Privacy

Last updated: 20 May 2026

This page explains what data Drop Match collects, how it's used, and what rights you have. We try to keep it short and free of legalese.

What we collect

Account data. Your email address (from Apple Sign-In or manual sign-up) and the nickname you give during onboarding. If you enter a goal weight or a motivation, we store it tied to your account.

Weight and health data. Weigh-ins you enter manually or import from Apple Health (weight, sleep, steps, workouts — only what you've given permission for). The data stays on your account and is never shared without your explicit invitation to an opponent.

Match data. The matches you're part of, the weigh-ins tied to each match, side bets, and messages the AI coach has generated. Reactions to feed posts.

Push tokens. If you turn on notifications, we store one Expo push token per device so we can send you messages about weigh-ins and match activity.

How we use it

The data is used to run the service: to show you your progress, to share the right slice with your opponent based on your choice (open vs. relative visibility), and to generate personalised coach messages via a language model.

We don't sell data, we don't run ads, and we don't pass data to third parties beyond what's strictly necessary to deliver the app.

Third parties

• Supabase — hosts accounts, matches, and weigh-ins. Data is stored in the EU.
• OpenAI (GPT-5.4) — generates the coach messages. The context sent includes your nickname, match rules, and weight trend, and — if you've entered a motivation — that too. An opponent's name is never sent to the model; we replace it with an anonymous placeholder before the request leaves us, and swap it back into the reply before you see it. Strict rules against extreme advice or fasting are built into the instructions. The model doesn't store the context between calls.
• Apple Sign-In / Apple Health — authentication and health-data import. Apple Health data stays on your device until we import specifically what you've given permission for.
• Expo Push Service — delivers push notifications to your iOS devices. We only send messages, not profile data.

Your rights

Delete your account. Inside the app, on the Me tab, you can permanently delete your account. This removes your profile, weigh-ins, matches you created, and coach messages generated for you. Active matches are resolved as a walkover for your opponent.

Export your data. Email hello@dropmatch.app and we'll export everything we hold about you as JSON.

Complain. You can lodge a complaint with a data protection authority if you believe we're handling data incorrectly. Drop Match is operated from Norway, where the supervisory authority is Datatilsynet.

Disclaimer

Drop Match is a motivation app, not a medical tool. The content is not medical advice. Talk to your doctor before making major changes to diet, exercise, or medication.

Contact

Questions or concerns? Email hello@dropmatch.app.