Privacy Policy

Preamble

With the following privacy policy we would like to inform you about the types of personal data (hereinafter also referred to as "data") we process, for which purposes and to what extent in the context of providing our application.

The terms used are not gender-specific.

Last Update: 30. May 2026

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Table of contents

Controller

Guido Stoff Apps
Guido Stoff
Holter 15
53937 Schleiden
Germany

E-mail address: privacy@multibatterymonitor.com

Legal Notice: https://www.guidostoffapps.com/impressum

Overview of processing operations

The following table summarises the types of data processed, the purposes for which they are processed and the concerned data subjects.

Categories of Processed Data

Categories of Data Subjects

Purposes of Processing

Relevant legal bases

Relevant legal bases according to the GDPR: In the following, you will find an overview of the legal basis of the GDPR on which we base the processing of personal data. Please note that in addition to the provisions of the GDPR, national data protection provisions of your or our country of residence or domicile may apply. If, in addition, more specific legal bases are applicable in individual cases, we will inform you of these in the data protection declaration.

National data protection regulations in Germany: In addition to the data protection regulations of the GDPR, national regulations apply to data protection in Germany. This includes in particular the Law on Protection against Misuse of Personal Data in Data Processing (Federal Data Protection Act - BDSG). In particular, the BDSG contains special provisions on the right to access, the right to erase, the right to object, the processing of special categories of personal data, processing for other purposes and transmission as well as automated individual decision-making, including profiling. Furthermore, data protection laws of the individual federal states may apply.

Reference to the applicability of the GDPR and the Swiss DPA: This privacy policy is intended to provide information in accordance with both the Swiss Federal Act on Data Protection (FADP) and the General Data Protection Regulation (GDPR). Where references are made to concepts such as the processing of personal data, legitimate interests, or special categories of data, these references are to be understood in accordance with the applicable data protection laws. Within the scope of application of the Swiss FADP, the legal interpretation of these terms is determined exclusively by Swiss law.

Security Precautions

We take appropriate technical and organisational measures in accordance with the legal requirements, taking into account the state of the art, the costs of implementation and the nature, scope, context and purposes of processing as well as the risk of varying likelihood and severity for the rights and freedoms of natural persons, in order to ensure a level of security appropriate to the risk.

The measures include, in particular, safeguarding the confidentiality, integrity and availability of data by controlling physical and electronic access to the data as well as access to, input, transmission, securing and separation of the data. In addition, we have established procedures to ensure that data subjects' rights are respected, that data is erased, and that we are prepared to respond to data threats rapidly. Furthermore, we take the protection of personal data into account as early as the development or selection of hardware, software and service providers, in accordance with the principle of privacy by design and privacy by default.

Securing online connections through TLS/SSL encryption technology (HTTPS): To protect the data of users transmitted via our online services from unauthorized access, we employ TLS/SSL encryption technology. Secure Sockets Layer (SSL) and Transport Layer Security (TLS) are the cornerstones of secure data transmission on the internet. These technologies encrypt the information that is transferred between the website or app and the user's browser (or between two servers), thereby safeguarding the data from unauthorized access. TLS, as the more advanced and secure version of SSL, ensures that all data transmissions conform to the highest security standards. When a website is secured with an SSL/TLS certificate, this is indicated by the display of HTTPS in the URL. This serves as an indicator to users that their data is being securely and encryptedly transmitted.

Transmission of Personal Data

In the course of processing personal data, it may happen that this data is transmitted to or disclosed to other entities, companies, legally independent organizational units, or individuals. Recipients of this data may include service providers tasked with IT duties or providers of services and content that are integrated into a website. In such cases, we observe the legal requirements and particularly conclude relevant contracts or agreements that serve to protect your data with the recipients of your data.

International data transfers

Data Processing in Third Countries: If we transfer data to a third country (i.e., outside the European Union (EU) or the European Economic Area (EEA)), or if this occurs in the context of using third-party services or the disclosure or transfer of data to other individuals, entities, or companies (which becomes apparent either from the postal address of the respective provider or when explicitly mentioned in the privacy policy regarding data transfer to third countries), this is always done in accordance with legal requirements.

For data transfers to the USA, we primarily rely on the Data Privacy Framework (DPF), which has been recognized as a secure legal framework by the EU Commission's adequacy decision of July 10, 2023. Additionally, we have concluded Standard Contractual Clauses with the respective providers, which comply with the EU Commission's requirements and establish contractual obligations to protect your data.

This dual safeguard ensures comprehensive protection of your data: The DPF serves as the primary level of protection, while the Standard Contractual Clauses act as an additional security measure. Should any changes occur within the DPF framework, the Standard Contractual Clauses will serve as a reliable fallback option. This ensures that your data remains adequately protected even in the event of political or legal changes.

For individual service providers, we will inform you whether they are certified under the DPF and if Standard Contractual Clauses are in place. The list of certified companies and further information about the DPF can be found on the U.S. Department of Commerce's website at https://www.dataprivacyframework.gov/.

For data transfers to other third countries, appropriate safeguards apply, particularly Standard Contractual Clauses, explicit consent, or legally required transfers. Information on third-country transfers and applicable adequacy decisions can be found in the information provided by the EU Commission: https://commission.europa.eu/law/law-topic/data-protection/international-dimension-data-protection_en.

We will inform you which of our service providers are certified under the Data Privacy Framework as part of our data protection notices.

General Information on Data Retention and Deletion

We delete personal data that we process in accordance with legal regulations as soon as the underlying consents are revoked or no further legal bases for processing exist. This applies to cases where the original purpose of processing is no longer applicable or the data is no longer needed. Exceptions to this rule exist if statutory obligations or special interests require a longer retention or archiving of the data.

In particular, data that must be retained for commercial or tax law reasons, or whose storage is necessary for legal prosecution or protection of the rights of other natural or legal persons, must be archived accordingly.

Our privacy notices contain additional information on the retention and deletion of data specifically applicable to certain processing processes.

In cases where multiple retention periods or deletion deadlines for a date are specified, the longest period always prevails.

Data that is no longer stored for its originally intended purpose but due to legal requirements or other reasons are processed exclusively for the reasons justifying their retention.

Data Retention and Deletion: The following general deadlines apply for the retention and archiving according to German law:

Start of the period at the end of the year: If a period does not expressly start on a specific date and lasts at least one year, it automatically begins at the end of the calendar year in which the event triggering the period occurred. In the case of ongoing contractual relationships in the context of which data is stored, the event triggering the deadline is the time at which the termination or other termination of the legal relationship takes effect.

Rights of Data Subjects

Rights of the Data Subjects under the GDPR: As data subject, you are entitled to various rights under the GDPR, which arise in particular from Articles 15 to 21 of the GDPR:

Business services

We process personal data of our contractual and business partners, such as Customers, Clients, Prospective Customers, Suppliers and other cooperation partners (collectively referred to as "Contractual Partners"), for the initiation, execution and settlement of contractual relationships as well as comparable legal relationships. This also includes pre-contractual measures carried out at the request of the parties and communication related to the respective contractual relationship.

Processing serves in particular to fulfil our primary and secondary contractual obligations. This includes providing the agreed services, any update and information obligations, handling warranty claims and other service disruptions, processing revocations, terminations of continuing obligations, reversals, refunds as well as handling other contract-related statements and enquiries. Both one-off contracts and ongoing contractual relationships are covered.

In particular, we process master data such as name, address and where applicable company name; contact details such as email address and telephone number; contract and service data such as subject matter of the contract, duration of the contract, order or transaction number; usage and performance data; payment and billing data; as well as communication content and histories. Where necessary, we also process data disclosed or transmitted to us in connection with carrying out an assignment.

Furthermore, we process the data to safeguard our rights and to comply with legal obligations. This particularly includes commercial law and tax law retention requirements, documentation obligations as well as possible duties of proof or accountability. Processing may also take place on the basis of our legitimate interests in proper business management, internal administration, risk control and IT security as well as in protecting our business operations and Contractual Partners against misuse or threats to data, secrets or other legal assets. This may include involving external Service Providers such as IT- and telecommunications providers, transport- or logistics companies, payment service providers, banks, tax advisors or legal advisors or other vicarious agents insofar as this is required for executing contracts or fulfilling legal obligations.

Personal data will only be passed on to third parties if this is necessary for fulfilling a contract or conducting pre-contractual measures; safeguarding legitimate interests; or complying with statutory obligations. We will inform you separately within this privacy policy about any further processing activities—particularly those undertaken for marketing purposes.

Which specific data is required in each case will be communicated to Contractual Partners during collection—for example by appropriate labelling in online forms or during personal contact.

Data will be deleted once it is no longer required for these purposes provided there are no statutory retention requirements preventing deletion. Statutory retention periods—particularly under commercial- or tax law—may require longer storage periods. Data transmitted in connection with a specific assignment will be deleted after completion of that assignment and expiration of any applicable retention period unless further statutory or contractual storage obligations exist.

Further information on processing methods, procedures and services used:

Business processes and operations

Personal data of service recipients and clients - including customers, clients, or in specific cases, mandates, patients, or business partners as well as other third parties - are processed within the framework of contractual and comparable legal relationships and pre-contractual measures such as the initiation of business relations. This data processing supports and facilitates business processes in areas such as customer management, sales, payment transactions, accounting, and project management.

The collected data is used to fulfil contractual obligations and make business processes efficient. This includes the execution of business transactions, the management of customer relationships, the optimisation of sales strategies, and ensuring internal invoicing and financial processes. Additionally, the data supports the protection of the rights of the controller and promotes administrative tasks as well as the organisation of the company.

Personal data may be transferred to third parties if necessary for fulfilling the mentioned purposes or legal obligations. After legal retention periods expire or when the purpose of processing no longer applies, the data will be deleted. This also includes data that must be stored for longer periods due to tax law and legal obligations to provide evidence.

Further information on processing methods, procedures and services used:

Use of online platforms for listing and sales purposes

We offer our services on online platforms operated by other service providers. In addition to our privacy policy, the privacy policies of the respective platforms apply. This is particularly true with regard to the payment process and the methods used on the platforms for performance measuring and behaviour-related marketing.

Further information on processing methods, procedures and services used:

Payment Procedure

Within the framework of contractual and other legal relationships, due to legal obligations or otherwise on the basis of our legitimate interests, we offer data subjects efficient and secure payment options and use other service providers for this purpose in addition to banks and credit institutions (collectively referred to as "payment service providers"). Payment transactions are carried out exclusively via encrypted connections in accordance with the state of the art, ensuring that the data entered is protected from unauthorized access during transmission.

The data processed by the payment service providers includes inventory data, such as the name and address, bank data, such as account numbers or credit card numbers, passwords, TANs and checksums, as well as the contract, total and recipient-related information. The information is required to carry out the transactions. However, the data entered is only processed by the payment service providers and stored with them. I.e. we do not receive any account or credit card related information, but only information with confirmation or negative information of the payment. Under certain circumstances, the data may be transmitted by the payment service providers to credit agencies. The purpose of this transmission is to check identity and creditworthiness. Please refer to the terms and conditions and data protection information of the payment service providers.

The terms and conditions and data protection information of the respective payment service providers apply to the payment transactions and can be accessed within the respective websites or transaction applications. We also refer to these for further information and the assertion of revocation, information and other data subject rights.

Further information on processing methods, procedures and services used:

Provision of online services and web hosting

We process user data in order to be able to provide them with our online services. For this purpose, we process the IP address of the user, which is necessary to transmit the content and functions of our online services to the user's browser or terminal device.

Further information on processing methods, procedures and services used:

Processing of data in the context of applications (apps)

We process the data of the users of our application to the extent necessary to provide the users with the application and its functionalities, to monitor its security and to develop it further. Furthermore, we may contact users in compliance with the statutory provisions if communication is necessary for the purposes of administration or use of the application. In addition, we refer to the data protection information in this privacy policy with regard to the processing of user data.

Legal basis: The processing of data necessary for the provision of the functionalities of the application serves to fulfil contractual obligations. This also applies if the provision of the functions requires user authorisation (e.g. release of device functions). If the processing of data is not necessary for the provision of the functionalities of the application, but serves the security of the application or our business interests (e.g. collection of data for the purpose of optimising the application or security purposes), it is carried out on the basis of our legitimate interests. If users are expressly requested to give their consent to the processing of their data, the data covered by the consent is processed on the basis of the consent.

Further information on processing methods, procedures and services used:

Purchase of applications via Appstores

The purchase of our apps is done via special online platforms operated by other service providers (so-called "appstores"). In this context, the data protection notices of the respective appstores apply in addition to our data protection notices. This applies in particular with regard to the methods used on the platforms for webanalytics and for interest-related marketing as well as possible costs.

Further information on processing methods, procedures and services used:

Registration, Login and User Account

Users can create a user account. Within the scope of registration, the required mandatory information is communicated to the users and processed for the purposes of providing the user account on the basis of contractual fulfilment of obligations. The processed data includes in particular the login information (name, password and an e-mail address).

Within the scope of using our registration and login functions as well as the use of the user account, we store the IP address and the time of the respective user action. The storage is based on our legitimate interests, as well as the user's protection against misuse and other unauthorized use. This data will not be passed on to third parties unless it is necessary to pursue our claims or there is a legal obligation to do so.

Users may be informed by e-mail of information relevant to their user account, such as technical changes.

Further information on processing methods, procedures and services used:

Single Sign-on Authentication

Single Sign-On" or "Single Sign-On Authentication or Logon" are procedures that allow users to log in to our online services using a user account with a provider of Single Sign-On services (e.g. a social network). The prerequisite for Single Sign-On Authentication is that users are registered with the respective Single Sign-On provider and enter the required access data in the online form provided for this purpose, or are already logged in with the Single Sign-On provider and confirm the Single Sign-On login via the button.

Authentication takes place directly with the respective single sign-on provider. Within the scope of such authentication, we receive a user ID with the information that the user is logged in with the respective single sign-on provider under this user ID and an ID that cannot be used for other purposes (so-called "user handle"). Whether we receive further data depends solely on the single sign-on procedure used, the data releases selected as part of authentication and also which data users have released in the privacy or other settings of the user account with the single sign-on provider. Depending on the single sign-on provider and the user's choice, there can be different data, usually the e-mail address and the user name. The password entered by the single sign-on provider as part of the single sign-on procedure is neither visible to us nor is it stored by us.

Users are requested to note that their data stored with us can be automatically compared with their user account with the single sign-on provider, but this is not always possible or actual. If, for example, the e-mail addresses of users change, users must change these manually in their user account with us.

We can use single sign-on authentication, provided that it has been agreed with users in the context of pre-fulfillment or fulfilment of the contract, in the context of consent processing and otherwise use it on the basis of our legitimate interests and the interests of users in an effective and secure authentication system.

Should users decide to no longer want to use the link of their user account with the Single Sign-On provider for the Single Sign-On procedure, they must remove this link within their user account with the Single Sign-On provider. If users wish to delete their data from us, they must cancel their registration with us.

Further information on processing methods, procedures and services used:

Contact and Inquiry Management

When contacting us (e.g. via mail, contact form, e-mail, telephone or via social media) as well as in the context of existing user and business relationships, the information of the inquiring persons is processed to the extent necessary to respond to the contact requests and any requested measures.

Further information on processing methods, procedures and services used:

Push notifications

With the consent of the users, we can send the users so-called "push notifications". These are messages that are displayed on users' screens, devices or browsers, even if our online services are not being actively used.

In order to sign up for push messages, users must confirm that their browser or device has requested to receive push messages. This approval process is documented and stored. The storage is necessary to recognize whether users have consented to receive the push messages and to be able to prove their consent. For these purposes, a pseudonymous identifier of the browser (so-called "push token") or the device ID of a terminal device is stored.

The push messages may be necessary for the fulfilment of contractual obligations (e.g. technical and organisational information relevant for the use of our online offer) and will otherwise be sent, unless specifically mentioned below, on the basis of user consent. Users can change the receipt of push messages at any time using the notification settings of their respective browsers or end devices.

Contents:

Notifications about low battery levels of monitored devices and alerts when the connection to monitored devices is interrupted.

Our settings and options to unsubscribe:

Push notifications can be disabled in the app settings as well as in the device system settings.

Further information on processing methods, procedures and services used:

Cloud Services

We use Internet-accessible software services (so-called "cloud services", also referred to as "Software as a Service") provided on the servers of its providers for the storage and management of content (e.g. document storage and management, exchange of documents, content and information with certain recipients or publication of content and information).

Within this framework, personal data may be processed and stored on the provider's servers insofar as this data is part of communication processes with us or is otherwise processed by us in accordance with this privacy policy. This data may include in particular master data and contact data of data subjects, data on processes, contracts, other proceedings and their contents. Cloud service providers also process usage data and metadata that they use for security and service optimization purposes.

If we use cloud services to provide documents and content to other users or publicly accessible websites, forms, etc., providers may store cookies on users' devices for web analysis or to remember user settings (e.g. in the case of media control).

Further information on processing methods, procedures and services used:

Changes and Updates

We kindly ask you to inform yourself regularly about the contents of our data protection declaration. We will adjust the privacy policy as changes in our data processing practices make this necessary. We will inform you as soon as the changes require your cooperation (e.g. consent) or other individual notification.

If we provide addresses and contact information of companies and organizations in this privacy policy, we ask you to note that addresses may change over time and to verify the information before contacting us.

Supervisory authority competent for us:

State Commissioner for Data Protection and Freedom of Information North Rhine-Westphalia
Kavalleriestraße 2-4
40213 Düsseldorf
Germany

Terminology and Definitions

In this section, you will find an overview of the terminology used in this privacy policy. Where the terminology is legally defined, their legal definitions apply. The following explanations, however, are primarily intended to aid understanding.