Atlas

Atlas Privacy Policy

Version 1.2 · Last updated 7 November 2026

1. Summary

2. Who is responsible

Developer: LI YAN-SHAN (“I”), an individual developer in Taiwan.
Contact: [email protected]
Users in the EU or the UK who need a postal address may ask for it by email.

3. Your location

If you allow location access, the app uses your precise location on your phone to find events near you and how far away they are, to alert you only when something happens nearby, to find the nearest shelters and fire and police stations, and to show the weather and the local time where you are. Some lists are built into the app, such as Taiwan’s air-raid shelters and fire and police stations and Singapore’s civil defence shelters, so looking them up sends nothing.

Location is optional: without it the app still shows information worldwide, and you can add places to My places by hand. The app does not track your location in the background. When it checks for new alerts in the background, it uses only an approximate location kept on the phone (a grid of about 5 km).

4. What the app sends, and to whom

To download data, the app connects to these services as you use it:

PurposeWhat is sentRecipient
WeatherYour location and the places in My places, rounded to about 1 kmAtlas’s server, which gets the forecast from MET Norway (the Norwegian Meteorological Institute) for you; if the server does not answer, the app asks MET Norway directly. For places in Japan the app downloads the Japan Meteorological Agency’s forecast for the area instead, which sends no coordinates.
Satellite fire hotspotsNo locationAtlas’s server (from NASA FIRMS)
Base mapThe map area you are viewing (tile numbers)OpenFreeMap
Satellite and aerial imagery (realistic look)The map area you are viewingNASA GIBS; the Geospatial Information Authority of Japan
3D terrainThe map area you are viewingMapterhorn
3D close-up of an eventThe area around the eventApple Maps
Nearby shelters and meeting points; Japan’s hazard mapsMap tiles around you and the places in My places (about 5 to 40 km across)The Geospatial Information Authority of Japan, Norway’s Directorate for Civil Protection, Sweden’s Civil Contingencies Agency, Switzerland’s Federal Office for Civil Protection, the district of Vorpommern-Greifswald (Germany), the Autonomous Province of Bolzano (Italy), the City of Kyiv
Warnings, earthquakes, typhoons, outages and other dataNo coordinates. Some sources are downloaded only when you or a place in My places are near them, so a source could tell roughly which country or region you are in from what was downloaded.Governments and international organizations (the full list, with links, is in Settings > Data sources)

Like any website you visit, these services see your IP address and may keep request logs under their own policies (for example up to 90 days at MET Norway and up to 30 days at Mapterhorn). They are in various countries and each has its own privacy policy.

5. Atlas’s server

6. Data kept on your phone

The following stays on your phone, and I cannot access it: your settings (language, appearance, alert radius, layers turned on); the names and coordinates of My places (up to five, or twenty with Atlas Pro); whether you have Atlas Pro, as Apple last said; the events you follow; background check records and the approximate location; caches of downloaded data; the home screen widget’s contents (place names and event titles only, no coordinates).

You can delete all of it in Settings > Data on this phone; deleting the app deletes it too.

7. Purchases and subscriptions

8. Translation and diagnostics

9. Legal basis and retention

10. Push notifications (planned)

Alerts today are local notifications created by the phone itself. If push notifications are added, I will update this policy and ask for your consent first. The app will then send my server:

The server sends a region’s alerts to its subscribers, and your phone decides whether they are near you. This data is used only to deliver alerts, is not used for advertising or tracking, and contains nothing that names you, such as a name or an email address. It is deleted when the token expires, after 30 days without an update, or when you turn alerts off.

11. Children

Atlas is a general-audience app, is not directed to children under 13, and collects no personal data from anyone.

12. Your rights

You may access, correct or delete your data, object to processing, or withdraw consent. Because I keep no data that identifies you, you can do all of this with the app’s clear-data function and the iOS permission settings. For any question, write to the address above; I will reply within 30 days. You may also complain to the data protection authority where you live.

13. Security

The app connects only over HTTPS, contains no keys or passwords, and keeps your precise location on the phone.

14. Changes

When this policy changes, I will update its version and date on this page, and announce significant changes in the app.