Privacy Policy

Optional advertising measurement

Only with your consent do we load the Google Ads tag (Google Ireland Limited), which uses advertising cookies to attribute a completed sign-in to an ad. This includes returning users signing in again; it does not count only new registrations. We do not send your email, name, account identifier, diary contents, profile or health records. Enhanced conversions and ad personalization are disabled. Google also receives ordinary technical data such as your IP address and browser information when contacted.

You can decline or change your choice using “Ad measurement”. Declining does not limit the app, and we do not load the Google Ads tag before consent. Your choice is kept only in your browser for at most 180 days. A temporary random sign-in attempt identifier is valid in browser session storage for at most 30 minutes and prevents duplicate conversion submissions. This measurement does not change the MYBACK database or stored records. Google processing details: https://business.safety.google/privacy/ and https://policies.google.com/technologies/ads.

1. Developer and contact

The developer and controller is Pavel Jonák, author of the project “Doktor, co není doktor”. Contact for privacy, support and deletion requests: doktorconenidoktor@gmail.com.

This policy covers MY BACK (Android package cz.myback.app), also called MYBACK / OH SH#T, MY BACK!, and its features provided at myback.cz.

2. Data we process and why

The data depends on the features you use. Health records and profile fields are not required just to browse the anatomical atlas.

• Account: ChatGPT sign-in provides a user identifier, email address and, where available, a name. These associate your private records, access rights and orders with your account. We do not receive or store your ChatGPT password.
• Personal and health records: locations and intensity of pain, dates and times, comments, descriptions, drawings, context, observations, favorite locations and daily changes that you enter. These support your journal, timeline, summaries, comparisons and exports you choose to use.
• Training and activity: selected or custom exercises, workouts, sets, repetitions, load, effort, trained areas and muscles, notes, goals, activity and better days. These support your own training and activity history.
• Optional profile: sex / gender, age, weight and selected activity frequency. Fields can be left blank, edited or cleared in profile settings.
• PRO TĚLO / FOR YOUR BODY: weight entries with dates and notes, height, age, selected sex-specific equation and goal settings (starting and target weight, direction, pace and starting date). We also store your selected flag that an individual plan is needed; the flag itself does not distinguish a specific medical reason. Any health information you choose to write in a note remains part of that note. These data support weight history, BMI, an indicative resting-energy estimate, an illustrative goal scenario and its separate export. The combined chart uses a weekly average calculated from existing saved pain entries.
• Medication: your own medicine list, favorite / long-term markers and custom chart colors, names, product strength, form, ingredients and optional representative SÚKL code; schedules, times, dates, quantities, units, confirmed taken or skipped records, notes and optional schedule links. History retains the medicine snapshot from recording time. Technical revisions and save identifiers prevent duplicates and lost changes. These data support your calendar, chart of recorded intake, personal history, chosen time comparison with pain and exports. We do not prescribe doses or automatically assess drug interactions.
• Orders: paid features or contributions may create records of orders, amounts, payment status, subscriptions and related identifiers. We also keep records for daily usage limits and feature trials.
• FITNESS: after you confirm the preview, we import Health sleep intervals and available stages, step counts, heart-rate measurements, timestamps and selected source names. The original ZIP/XML is processed on your device and is not sent to our server. Only selected measurements are saved to a signed-in account; guest imports remain in page memory. A new import replaces the previous import, not the pain journal. You can remove the import directly in FITNESS. Automatic sync with Apple Health is not active. Imported measurements are not used for advertising measurement or external generative AI and are included in account-data deletion.
• DEATHCLOCK: draft and completed answers, age from your completed profile or an age or birth date you enter, acknowledgement of the entry warning, and unit and sound settings. A birth date is processed only if you enter it. Signed-in questionnaires are saved to the account; guest questionnaires remain only in the open page memory. The fictional scenario locally uses selected available record inputs, excluding pain and free-text notes. It is not an actual lifespan estimate or a prediction of death.
• Tutorials: signed-in accounts retain only opened-guide identifiers and first-opened times so guides do not automatically repeat, including on another device. Browser flags are cached separately for the current account or guest. Tutorial examples are not saved as health records. Guides can be replayed from the Tutorials account section. Full account deletion includes these flags.
• LIFE CANISTER: motivational points are computed from completed workouts and imported steps and sleep. Signed-in accounts retain daily imported-measurement summaries beyond the latest import window to maintain a long-term balance. Importing the same day replaces its original contribution. Removing the Fitness import also removes its canister archive; deleting a workout corrects its contribution. Points do not measure lifespan gained or lost. Full account deletion includes these daily summaries and technical revisions.
• Free PRO TĚLO entries: to allow the first five new entries without paid access, we record successful saves, entry identifiers and save times. Editing or deleting an entry does not restore free entries already used.
• Support: your email address and message contents are processed when you contact us. Please avoid sending unnecessary medical documents with a routine support question.
• Technical operation: hosting and authentication providers process information necessary to deliver and secure the service, such as IP addresses, request times, browser information and operational or error logs.

3. Trying the app without signing in

Guest journal, training, activity and profile data, including PRO TĚLO weight entries, settings, goals, medicine lists, schedules and medication records, stays in the open page’s memory. It is not sent through MYBACK account APIs to our database. Refreshing or closing the page or clearing the temporary session removes it. Only when sign-in starts do we keep a transfer copy in this tab’s sessionStorage for up to two hours. After sign-in we try to save it to the verified account and remove the copy once every item is confirmed. Conflicts, limits or outages leave the copy available until expiry for retry or download.

A signed-in account receives the first five new PRO TĚLO entries free; further new entries require paid access. For a guest, the five free entries and their counter apply only to the current open visit, not to a permanently identified person. Transferring trial data respects the account’s free limits and paid permissions. Existing account data with different contents is not overwritten automatically.

The service still connects to the internet to load the app and any embedded services. Signed-in records are stored on the server under your account after you save them.

4. Device storage, microphone and exports

The device remembers settings such as language, appearance, body model and graphics preferences. The platform uses its technical mechanisms, including cookies, for authentication and security. The installable web app’s offline cache is for public icons, not a substitute for the private database.

The microphone starts only after you press the voice-entry button and grant the relevant device or browser permission. Speech recognition may process audio through the browser or operating-system provider. MYBACK does not store audio recordings. You can review, edit or discard the transcript; text is saved to your journal only when you confirm your record.

Summaries, anatomical associations, the experimental personal outlook and PRO TĚLO calculations use local rules and calculations. These features do not send journal text or PRO TĚLO data to an external generative AI model. Their results are not a medical diagnosis; the weight-goal line is an illustrative scenario, not a guarantee of progress.

An export you create is downloaded to your device. If you send or share that file yourself, you choose its recipient and subsequent use.

5. Service providers and recipients

Your records are not public atlas or contact-directory content. We do not sell private records or use them to target advertising. The following providers support the features you choose:

• OpenAI / ChatGPT: authentication and the Sites platform on which the service runs.
• Cloudflare: technical delivery and database infrastructure for saved account records.
• Stripe: checkout and subscription management where payments are enabled. Card details are entered with the payment provider and are not stored in our app database. We do not send health notes with orders.
• SÚKL: public medicine reference data is downloaded to our infrastructure; search text is processed locally in your browser. We do not send your personal medicine list, intake records or search text to SÚKL.
• Google Maps: map previews when opened. They may process IP addresses, device information and their own cookies under their policies. Maps receive the clinic’s address, not your health records or current location.
• Your browser or operating-system provider: optional speech recognition and device features.

6. Security and international processing

Communication with the app uses HTTPS. Account APIs verify authentication on the server and associate private reads and changes with their owner. Absolute security of the internet or your device cannot be guaranteed.

The providers’ infrastructure may involve processing outside the European Economic Area. Specific locations and safeguards depend on the provider. We do not promise storage exclusively in Czechia. See the providers’ policies and terms linked below.

7. Retention

Saved personal records and profiles are retained to provide your chosen features until you delete them or a deletion request is handled. Signing out, uninstalling the app or becoming inactive does not automatically delete server records.

Signed-in weight entries, settings and goals for PRO TĚLO are stored on the server under the account. After an individual weight entry is deleted, its opaque identifier and save time remain in usage records so deletion does not reset the first-five-free limit. These usage records do not contain the weight value or note. A request to delete the entire account and associated data includes these usage records.

Records necessary for billing, legal obligations or specific legal claims may be retained for the necessary period after other data is deleted. This is not a blanket exception for your health journal. Any relevant reason and scope will be explained when your request is handled.

Infrastructure providers also manage technical logs and backups under their own rules and cycles. Deletion from the active database may therefore not immediately remove every technical backup copy.

8. Deletion and your rights

Individual records can be managed and deleted in the relevant app sections. To request deletion of your MY BACK app account and all associated data, email doktorconenidoktor@gmail.com. The public “Delete account and data” page explains the steps. You can start without signing in.

Preferably write from the email associated with your account and state that you want the MY BACK account and related personal data deleted. Do not send passwords or verification codes. We may request only the verification necessary to establish that the request is authorized. This is deletion, not merely account deactivation.

Deletion covers health records, drawings, favorites, profile, workouts, custom exercises, goals, activities, PRO TĚLO weight entries, settings and goals including the individual-plan flag and entry-usage records, medicine lists, schedules, medication records and related app data, subject to the justified exceptions described above. Deleting MY BACK does not delete your separate ChatGPT account or replace subscription management with the payment provider.

Depending on applicable law, you may request access, correction, erasure, restriction or portability, or object to processing. Where processing relies on consent, you may withdraw it. Requests are handled without undue delay, normally within one month; we will explain any lawful extension. You may also complain to the Czech Office for Personal Data Protection.

Request account and data deletion

9. Updates

This version is effective from 11 November 2026. We will update this policy and its date when features or data practices change. The current version remains publicly available at https://myback.cz/privacy.

Provider policies and privacy authority