Privacy policy

Last updated 17 October 2026

Frost Tonight is built so that we know as little about you as possible. There are no accounts, no names, no e-mail addresses and no advertising.

Who is responsible

Tullin Advisory v/Peter Tullin, CVR 35751793, Hans Hedtofts Gade 8, 4. th., 2300 København S, Denmark. support@frosttonight.app

What the app stores on your phone

Your location (to fetch the weather for your garden), your answers to the garden questions, the plants you picked, your warning time and your answers to "Was there frost this morning?". All of this stays on your phone.

What is sent to our server

To send you an evening warning, the app sends to our server (Cloudflare):

• your location rounded to about 1 km – never your exact position;
• your garden profile (terrain, shelter, surroundings, pots or beds), your plant list with their frost thresholds, your warning hour and time zone – for each of your spots (up to three);
• if you have more than one spot, the name you gave it ("Allotment"), so the warning can say which one it is about. Pick a name that isn't an address;
• an anonymous push-notification token issued by Apple, so we can reach your phone. It cannot be used to identify you.

We use this only to send you the warnings you asked for (GDPR art. 6(1)(b)). We also keep a 30-day log of warnings sent (time, estimated temperature, delivery status) to investigate false alarms (legitimate interest, art. 6(1)(f)). It contains no personal information.

Weather data

Forecasts come from Open-Meteo. Only the rounded 1 km cell is sent to them.

Purchases

Subscriptions are handled by Apple through the App Store. We use RevenueCat to check subscription status; RevenueCat receives an anonymous app-user id and Apple's purchase receipt, nothing else. See RevenueCat's privacy policy.

Tracking and analytics

None. No third-party analytics, no advertising SDKs, no tracking across apps or websites.

This website

frosttonight.app uses no analytics and no tracking cookies. If you pick a language in the menu, the choice is saved in a cookie (ft_lang) for one year so the site opens in that language next time. Our host, Cloudflare, processes your IP address to deliver the page. We don't keep access logs.

Service providers and transfers

Cloudflare (website and server), Open-Meteo (weather), RevenueCat (subscription status) and Apple (push notifications and App Store). Where data is transferred to the USA, the transfer is based on the EU–US Data Privacy Framework or the European Commission's standard contractual clauses.

How long we keep it

Delete the app and everything on your phone is gone. Your server record is deleted automatically when Apple reports the push token as invalid (which happens after uninstall), or on request. The warning log is kept for 30 days.

Your rights

You have the right to access, correct and delete your data, to restrict or object to processing, and to data portability. Write to support@frosttonight.app. Because we hold no name or e-mail address, deleting the app is the quickest way to remove everything. You can complain to the Danish Data Protection Agency (Datatilsynet) or to the data protection authority where you live.