Doubles Privacy Policy
Effective October 13, 2026
Doubles ("the app", "we", "us") is a food and fitness journal with an AI coach named Otto. It is made by Supercharge LLC. This policy explains what the app collects, where it goes and the choices you have.
The short version
- Your journal lives on your phone first. If you turn on sync, it is also stored privately on our servers so it survives a lost or replaced phone.
- When you use AI features, the note, photo or voice recording you send, plus some recent journal context and Apple Health readings, goes to our AI providers (OpenAI, Anthropic and Groq) to produce your entry or reply. AI is off until you turn it on.
- We read Apple Health only with your permission and only the categories you choose. We never sell your data, never use it for advertising and never share Health data for marketing.
- You can export your records, or delete your account and all of its data, from inside the app.
What we collect
Account details. When you sign in with Apple we receive a private account identifier from Apple and, if you choose to share them, your name and email address. Apple lets you hide your real email, in which case we receive a relay address.
Your journal. Meals, drinks and supplements, the daily list you keep (such as creatine, water or a medicine), nutrition estimates, workouts, notes, targets, and the answers you give when setting up your plan, such as age, height, weight, goal and activity level.
Photos. Food, nutrition-label and progress photos you choose to attach.
Voice recordings. When you record a voice note and choose Send or Review, the recording is sent to Groq to be turned into text (or to OpenAI if Groq is unavailable). Recordings pass through our server in memory and are not stored on our servers. A recording that fails to send stays on your phone so you can try again.
Apple Health data. With your permission, the app reads the Health categories you select, such as workouts, steps, active calories, sleep, weight, body fat, lean mass, resting heart rate and heart rate variability. Health data is not synced to or stored on our servers. Active calories stay on your phone and are not sent to our AI providers. When AI is on, the day's Health readings and a short weekly summary (such as steps, sleep, weight and average resting heart rate and heart rate variability) are sent with your notes so Otto can take them into account. To stop this, turn AI off or remove the app's Health access.
Usage counts. We count how many AI requests each account makes per day to enforce fair-use limits. We do not use analytics or advertising tools, and we do not track you across other apps or websites.
How we use it
- To run the journal: save your entries, sync them between your phone and our servers, and estimate nutrition.
- To provide the coach: turn notes, photos and voice into journal entries, answer your questions, and write daily and weekly summaries.
- To keep the service safe and working: prevent abuse, enforce limits and fix problems.
We do not sell your data, use it for advertising, or use it to build profiles for anyone else.
Who we share it with
We share data only with service providers that run parts of the app for us, and only for that purpose:
| Provider | What they receive | Why |
|---|---|---|
| Cloudflare | Your synced journal, photos and account details | Hosts our servers, database and private photo storage |
| OpenAI | The text or photos you submit, with related journal context (recent totals, targets, open questions, the day's Apple Health readings and a weekly Health summary); voice recordings only if Groq is unavailable | Creates journal entries, nutrition estimates and coach replies, reads each typed message to decide which AI model answers it, may look up nutrition facts on the web, and is the backup for transcription |
| Anthropic | For some accounts, the text you submit (including the words of a voice note, but not photos or the recording itself), with the same journal context and Health readings | Writes some of Otto's coach replies, such as answers to questions, morning check-ins, closing the day and the weekly review, and may look up nutrition facts on the web |
| Groq | Voice recordings you choose to send | Turns speech into text |
| Apple | Sign-in requests | Sign in with Apple |
| Open Food Facts | A product barcode number only, with nothing that identifies you | Looks up nutrition for packaged foods |
We send AI requests with OpenAI's setting not to store them for later retrieval, and we have not opted in to any program that lets OpenAI, Anthropic or Groq train on our data. These providers may still keep request data for a limited time under their own published policies, for example to monitor for abuse, and then delete it.
ChatGPT connection (optional). If you choose to connect Doubles to your own ChatGPT account, ChatGPT can read your synced journal (days, targets and usual foods) when you ask it to. If you also allow editing, ChatGPT can prepare new entries, corrections or removals, but nothing changes in your journal until you tap Save on the Doubles card in ChatGPT. Your use of ChatGPT is covered by OpenAI's own privacy policy. You can disconnect at any time in the app.
We may disclose data if the law requires it, or to protect someone's safety.
Your choices
- AI and transcription can be turned off in You. The journal still works with manual logging.
- Sync can be turned off in You. This stops future syncing; records already on our servers stay there until you delete your account. AI sharing is controlled separately.
- Apple Health access is managed in the Health app or in iPhone Settings, one category at a time.
- Export your records from You › Privacy & your data.
- Delete your account in You › Privacy & your data › Delete account & all data. This removes your journal, photos and account from our servers and revokes the app's Sign in with Apple link.
How long we keep data
We keep your synced journal and photos while your account exists. Unfinished photo uploads are removed after a day. Voice recordings are not kept on our servers. When you delete your account, its data is removed from our live systems right away; if a step is interrupted, it is retried automatically. Our hosting provider's automatic backups expire on their own within 30 days. Data our AI providers hold follows their retention policies described above.
Security
Data travels over encrypted connections. Photos are stored privately and are available only to your signed-in account. No system is perfectly secure, but we limit who and what can reach your data.
Health and safety
Doubles gives general nutrition and fitness information. It is not medical advice and does not diagnose or treat any condition. Nutrition numbers are estimates. Talk to a doctor before making big changes to your diet or training, especially if you are pregnant or breastfeeding, under 18, or have a history of disordered eating.
Children
The app is not intended for children under 13, and we do not knowingly collect data from them.
Where data is processed
Our providers may process data in the United States and other countries.
Changes
If we change this policy, we will update the date above and, for important changes, tell you in the app.
Contact
Questions or requests: hello@supercharge.biz