Privacy Policy
Last updated: September 2026.
Please note: This is an English translation provided for your convenience. The German-language Datenschutzerklärung (privacy policy) is the legally binding version.
With this Privacy Policy, I inform you about the nature, scope and purpose of the processing of personal data on this website and in the Mika Guide, Mika Math and Mika Play services described here. Information about website cookies, the chat assistant and web analytics refers to the website. The separate Guide section describes iOS audio downloads and purchase checks in Mika Guide; Mika Math is described in section 12, and Mika Play in section 13. The controller within the meaning of the General Data Protection Regulation (GDPR) is:
Katarina Živković – Mika Autism
Im Paradies 23, 63853 Mömlingen, Germany
Email: info@mika-autism.com · Phone: +49 151 51836922
1. General information
I take the protection of your personal data seriously and treat it confidentially and in accordance with the applicable data protection laws. As a rule, you can use this website without providing any personal data. This website uses SSL/TLS encryption (recognizable by “https://” in the address bar).
2. Hosting and server log files
This website is hosted by STRATO GmbH, Otto-Ostrowski-Straße 7, 10249 Berlin, Germany. A data processing agreement (Art. 28 GDPR) has been concluded with the host. When you access the website, the server automatically records information in so-called log files: browser type and version, operating system, referrer URL, the pages visited, the date and time of access, and the IP address. This data serves to ensure trouble-free operation and security (legal basis: Art. 6(1)(f) GDPR) and is not merged with other data sources.
3. Cookies, local storage & fonts
- This website uses no tracking, analytics or marketing cookies (no Google Analytics or the like). Visitor statistics are collected solely via the cookie-less service Plausible Analytics (see section 10).
- To remember that you have closed the privacy notice or the chat notice, that you have enabled the “Calm view”, and that you have dismissed the language notice, localStorage in your browser is used (technically necessary, containing no personal data).
- The Mika Guide web app stores your entries – for example names, the emergency card/profile, worksheets and progress – exclusively locally in your device’s localStorage. This data is not transmitted to our server or to third parties and can be deleted in the app at any time using the “Delete local data” function; an existing Mika+ activation is kept as proof of purchase and is only removed by clearing your browser data.
- The fonts are loaded locally from this server – there is no request to Google Fonts or other external services, and your IP address is not transmitted to third parties in the process.
- For Mika Math, see section 12 for local learning progress, backups and purchase management.
4. Contacting me (contact form, email, phone)
If you send me inquiries via the contact form, by email or by phone, your details (name, email address, phone number where applicable, and the content of your message) are stored in order to process your request and for any follow-up questions. The legal basis is the performance of pre-contractual measures or the fulfillment of a contract (Art. 6(1)(b) GDPR) as well as my legitimate interest in processing the request (Art. 6(1)(f) GDPR). I do not pass on this data without your consent.
Please note: if your inquiry contains health data (for example, information about your child’s diagnosis), I process this solely to handle your request and on the basis of your consent (Art. 9(2)(a) GDPR); you may withdraw this consent at any time with effect for the future.
5. Chat assistant “Mika Assistant” (artificial intelligence)
An optional chat assistant is available on this website. It is an AI assistant (not Katarina personally) that provides general information and guides you toward the free initial consultation. It does not make diagnoses and does not give medical advice.
- Processing: The text you enter is transmitted to the processor Anthropic PBC (the “Claude” service, USA) in order to generate the response. In this process, data may also be processed outside the EU (in the USA). The basis for a transfer to the USA is your explicit consent (Art. 49(1)(a) GDPR) or the EU Standard Contractual Clauses used by the providers (Art. 46 GDPR).
- Legal basis: Your consent, which you give when you start the conversation (after being informed beforehand in the chat window) – Art. 6(1)(a) GDPR.
- Storage: Conversations are not stored and are not used for advertising purposes. The conversation history exists only temporarily in your browser while the window is open, and is deleted when the page is reloaded.
- Voice output / read-aloud feature (optional): The chat assistant offers the option of having responses read aloud (text-to-speech). Only if you actively click the speaker icon is the respective response text transmitted to a processor for speech synthesis – the service ElevenLabs Inc. (USA) – in order to generate an audible voice output from it. In this process, processing may take place outside the EU (in the USA) (basis as above: Art. 49(1)(a) or Art. 46 GDPR). The audio is generated only at your request and is subsequently not stored either by me or – according to the provider’s statements – for the provider’s own purposes. Only the response text to be read aloud is transmitted; no other personal data.
- Please: Do not enter any sensitive data (for example, detailed health information about your child). For personal matters, please arrange a free initial consultation.
6. Retention period
Personal data is stored only for as long as it is necessary for the stated purposes or for as long as statutory retention periods apply. After that, the data is deleted.
7. Your rights
With regard to the personal data concerning you, you have the following rights: access (Art. 15 GDPR), rectification (Art. 16 GDPR), erasure (Art. 17 GDPR), restriction of processing (Art. 18 GDPR), data portability (Art. 20 GDPR) as well as the right to object to processing (Art. 21 GDPR). You may withdraw any consent you have given at any time with effect for the future (Art. 7(3) GDPR). To do so, simply contact me informally at info@mika-autism.com.
8. Right to lodge a complaint with a supervisory authority
You have the right to lodge a complaint with a data protection supervisory authority (Art. 77 GDPR). The competent authority is the Bavarian State Office for Data Protection Supervision (Bayerisches Landesamt für Datenschutzaufsicht, BayLDA), Promenade 18, 91522 Ansbach, Germany, www.lda.bayern.de.
9. Automatic features
No automated decision-making, including profiling, takes place on this website. Mika Math may automatically adapt learning levels based on locally stored results. This feature selects further activities; it does not make diagnoses or decisions about treatment or school grades.
10. Web analytics (Plausible Analytics)
To measure how this website is used, I use the privacy-friendly analytics service Plausible Analytics (Plausible Insights OÜ, Västriku tn 2, 50403 Tartu, Estonia – EU). Plausible works without cookies and stores no personal data: only aggregated statistics are collected (e.g. pages visited, approximate country of origin, device type, referral source). IP addresses are not stored, no user profiles are created, and individual visitors cannot be recognized across days. All data is processed exclusively on servers within the EU. The legal basis is my legitimate interest in analyzing the reach of this website (Art. 6(1)(f) GDPR). As no cookies are set and no personal data is stored, no consent is required.
11. Payment processing (Mika+)
Purchase via the website: The optional, paid add-on area Mika+ is processed via external payment providers: Stripe Payments Europe, Ltd., 1 Grand Canal Street Lower, Dublin 2, Ireland, and PayPal (Europe) S.à r.l. et Cie, S.C.A., 22–24 Boulevard Royal, L-2449 Luxembourg. You enter your payment details (for example card number or PayPal credentials) exclusively on the pages of the respective payment provider; I myself neither receive nor store complete payment data. From the payment providers I only receive the information required for processing and invoicing (in particular the payment confirmation, name, email address and the purchased product). The legal basis is the performance of the purchase contract for Mika+ (Art. 6(1)(b) GDPR). Stripe and PayPal may also process data outside the EU/EEA (including in the USA); such transfers are based on the EU standard contractual clauses used by the providers (Art. 46 GDPR) or other appropriate safeguards. Further information can be found in the privacy notices of Stripe and PayPal.
Purchase of Mika+ in Mika Guide (iOS or Android): Purchasing Mika+ within Mika Guide is billed exclusively through the Apple App Store or Google Play; I do not receive any payment data in the process. To verify and restore your purchase status, I use RevenueCat, Inc., 1100 Sansome St, San Francisco, CA 94111, USA. This involves processing a pseudonymous user identifier and purchase receipt data. The transfer to the USA is based on the EU Standard Contractual Clauses (Art. 46 GDPR). The legal basis is Art. 6(1)(b) GDPR (performance of a contract).
Audio in Mika Guide for iOS
The Mika Guide iOS app downloads prerecorded audio only when you start a language-pack download in the app. The files are downloaded over an encrypted connection from our web server www.mika-autism.com, hosted by STRATO. The server receives your IP address and the names of the requested audio files. Your personal entries, profiles and checklists are not sent in these requests. Audio downloads do not use cookies. Once downloaded successfully, the files are stored on your device and can be played without another internet request. An updated language pack may require a new download.
Your personal entries in the native app remain on your device. You can choose to send selected content to other apps or people using the share function. RevenueCat is set up for purchase management when the app starts; purchase-status checks may take place even if you have never purchased Mika+, and when you return to the app. These checks process technical data, an app user identifier assigned by RevenueCat and, where applicable, purchase receipt data. Your personal Guide entries are not sent to RevenueCat for these checks.
12. Mika Math — learning progress and purchase management
Learning and local storage: Mika Math does not require a user account and contains no advertising. Learning progress and settings are stored locally on the device in the installed app or web version. The app does not transfer learning progress to our servers or RevenueCat. The free number studio is not scored and does not change learning levels. The end of a Math+ subscription does not delete locally stored learning progress.
Backups: In the Parent Area, you can export and restore learning progress yourself. If you copy or share a backup, you choose its recipients. Clearing app or browser storage removes the local data stored there; it does not delete a backup saved or shared separately.
Math+ in the installed app: The service RevenueCat, Inc. (USA) is used to manage the optional, automatically renewing Math+ monthly subscription or the alternative Math+ one-time purchase. Purchase management is first activated when the protected Parent Area is successfully opened, even without a purchase. The activated SDK may then refresh purchase status automatically, including during later use or in the background. Closing the Parent Area does not stop this processing. Opening the Parent Area is not a separate declaration of consent.
Purchase and restoration data: RevenueCat processes an SDK-generated identifier (known as an anonymous App User ID), purchase history, receipt and transaction data, subscription status including duration and renewal, and technical device and app information, such as platform, device model, operating system, app and SDK version, language and currency. The identifier is pseudonymous and allows purchase data to be associated with it. Processing serves to attribute, verify, analyse and restore purchases. The app does not send names, email addresses, diagnoses, learning progress or answers from maths activities to RevenueCat.
Country in the purchase profile: According to the provider’s documentation, RevenueCat displays the transaction country. If that information is unavailable, it uses the country last determined from the IP address; RevenueCat states that it discards the IP address itself after determining the country. The country remains associated with the purchase profile and may be used for purchase analysis. This is not precise location detection by Mika Math.
Payment and service provider: Payment for Math+ is handled by the relevant app store at the local price shown before purchase. The monthly subscription renews automatically for one month at a time until you cancel renewal in that store’s subscription settings. With a standard cancellation, access continues until the end of the period already paid for. A refund or revocation of the purchase entitlement may end access earlier. Without a valid Math+ entitlement, the paid modules and all everyday maths are unavailable; the free area and locally stored learning progress remain. As an alternative to the monthly subscription, Math+ is available as a one-time purchase without automatic renewal. Confirmed one-time purchases remain valid and do not require an additional subscription. Mika Math does not receive credit card or bank details. RevenueCat is a US provider; purchase and technical data may also be processed in the USA. Further information on processing by the service is available from RevenueCat. The information about Mika+ in Mika Guide in section 11 is separate from the Math+ purchase management described here.
Read-aloud support and website links: Prepared voice recordings are included with the installed Math app. When needed, the app uses the device’s read-aloud feature. Mika Math does not send learning progress or activity answers to ElevenLabs to generate speech. The chat assistant described in section 5 belongs to the website. If you open a website link from the app, the hosting and web analytics information in sections 2 and 10 applies to that website visit.
Optional purchase and privacy support: For Math enquiries, you can write to kontakt@mika-autism.com, including without an identifier. Under Parents → Data → Show support ID, you can choose to read the existing RevenueCat identifier locally and copy it with a separate action. Displaying it does not additionally start purchase management or save the identifier in learning progress, a backup or app logs. Hiding it or closing the view clears the display; a copy you have chosen to create in the clipboard or a message is unaffected. The app does not automatically send an email or learning progress. If you send the identifier yourself, your enquiry and sender address can be associated with the RevenueCat purchase record. This allows a connection to your identity. The identifier alone does not prove authority over someone else’s record.
Access and deletion: You can use this contact channel to request access to or deletion of your purchase data at RevenueCat. The connection between the request and the record, and the exact scope, are checked before handling it; reasonable follow-up questions may be necessary if there are justified doubts. A deletion request does not trigger automatic deletion in the app. Resetting local learning progress does not delete purchase data at RevenueCat or the store. Confirmed deletion at RevenueCat is not a refund and does not automatically remove receipts independently held by the store or local data. Further SDK use, purchases or restorations may create data again. General information on retention and your rights is provided in sections 6 and 7; statutory retention obligations and the relevant store’s own processing must also be taken into account. Deleting the app, local learning progress or RevenueCat data does not cancel the subscription. Automatic renewal must be stopped in the relevant store.
13. Mika Play — progress and purchase management
Controller: Katarina Živković – Mika Autism is responsible for Mika Math and Mika Play; contact details appear at the beginning of this policy. Send requests to info@mika-autism.com.
Play and local data: Mika Play requires no Mika account and contains no advertising. Progress, settings, activity summaries and First–Then cards stay on the device. These contents are not sent for purchase management. Bundled images and voice recordings can be used offline; gameplay content is not sent to a speech service.
Optional store connection: The protected grown-ups’ area explains processing before connecting to the store. Purchase management through RevenueCat is configured only after selecting “Agree and connect to store”. Free worlds and settings remain usable without this connection. Once activated, the SDK may check purchase status again, including when returning to the app. Closing the grown-ups’ area does not end an already configured SDK session.
Play+ and purchase data: Play+ is a one-time purchase unlocking 30 additional worlds, with no subscription or automatic renewal. Payment is handled exclusively by the relevant app store at its displayed local price. Mika Play receives no credit card or bank details. RevenueCat, Inc. (USA) processes the SDK-generated pseudonymous app user ID, purchase receipts, transactions, purchase status and technical device, operating system, app and SDK information. The app sends no names, email addresses, diagnoses or gameplay progress to RevenueCat. Purchase data supports verification, access, restoration and purchase analysis, not advertising tracking.
Country and international processing: According to its documentation, RevenueCat uses the transaction country or, if unavailable, the last country inferred from the IP address. RevenueCat states that it discards the IP address after this inference; the country remains in the purchase profile. The app does not determine a precise location. Purchase and technical data may be processed in the USA. RevenueCat’s data processing agreement and standard contractual clauses apply to its services as a processor.
Purposes and legal bases for Math and Play: Requested purchase offers, purchases and access management are processed for steps prior to a contract and performance of a contract (Article 6(1)(b) GDPR). Technical purchase security and assessment of its functioning are based on the legitimate interest in a reliable service (Article 6(1)(f) GDPR). Maths answers and gameplay behaviour are not uploaded for this purpose. Connecting to the store is not consent to advertising or an external learning profile.
Deletion, restoration and links: Deleting local app data does not remove purchase records at the store or RevenueCat. Send access and deletion requests to the contact address above; we verify the request’s association and scope before processing it. Statutory retention and the store’s independent duties remain applicable. A new purchase or restoration may generate purchase data again. General rights and retention information are in sections 6 to 8. When you choose to open a website link, the relevant website’s privacy information also applies.