Privacy Policy

Last updated: June 1, 2026

Meteogram is designed to use as little personal data as possible. The app does not require an account, does not sell personal data, and does not use advertising. It uses limited anonymous analytics to understand basic app usage and improve the app.

1. Who we are

Meteogram is operated by the independent developer of Meteogram ("we", "us", "our"). For privacy questions or to exercise your data protection rights, contact mpenapps@protonmail.com.

2. Scope of this policy

This policy explains how Meteogram processes personal data when you use the app, website-hosted legal pages, and related services. It is intended to satisfy GDPR transparency requirements, including for users in Greece.

3. Data we process

Depending on how you use the app, we may process the following categories of data:

Location data - your device coordinates when you allow location access, so we can fetch forecasts and optionally refresh them in the background.
Search and place data - the place query you type and the selected place label, coordinates, and country code needed to show forecasts.
Local settings and cached content - pinned location, recent searches, preferences, cached forecasts, and related metadata stored on your device.
Purchase status - subscription or entitlement status provided through RevenueCat and the relevant app store.
Anonymous usage analytics - limited product-interaction events such as app opens, session duration, onboarding completion, weather refresh success, app version, platform, unit preference, and subscription access state such as free or paid plan type. These events do not include your name, email address, account identifier, advertising identifier, transaction identifier, precise coordinates, or selected place name.

4. Data we do not intentionally collect

Your name, email address, or account profile in the app
Advertising identifiers such as IDFA or GAID
Contacts, photos, messages, or similar device content
Payment card details, which are handled by Apple or Google

5. Why we process data and our legal bases

To provide weather forecasts you request - legal basis: performance of a contract under Article 6(1)(b) GDPR.
To remember your settings and chosen locations - legal basis: performance of a contract under Article 6(1)(b) GDPR.
To manage subscriptions and restore purchases - legal basis: performance of a contract under Article 6(1)(b) GDPR.
To understand anonymous app usage and improve Meteogram - legal basis: legitimate interests under Article 6(1)(f) GDPR.
To maintain, secure, and improve the service - legal basis: legitimate interests under Article 6(1)(f) GDPR.

6. Location permissions

If you grant location access, Meteogram uses your device coordinates to retrieve weather data for your current location. If you grant background location access, the app may refresh weather data in the background. You can also use Meteogram without device location by searching for a place manually.

7. Third-party recipients and processors

Apple WeatherKit - provides weather data. See Apple's privacy policy.
Nominatim / OpenStreetMap - used for place search and some reverse geocoding. See the OpenStreetMap Foundation privacy policy.
RevenueCat - used to manage subscriptions and entitlement state. See RevenueCat's privacy policy.
Aptabase - used for privacy-first anonymous analytics. Aptabase receives limited product-interaction events and subscription access state for app improvement and does not receive advertising identifiers, user accounts, transaction identifiers, precise coordinates, or place names from Meteogram. See Aptabase's privacy policy.
Cloudflare Workers - our server endpoint receives forecast request data and, for the optional AI weather summary feature, processes derived weather-summary inputs and outputs so the app can return weather data and short natural-language descriptions.
OpenAI - used only for the optional AI weather summary feature. We send derived weather-condition data and fallback forecast text to generate a short human-like weather description. We do not send your name, account, exact coordinates, precise place name, or other direct user identifiers to OpenAI for this feature.
Apple App Store / Google Play - process purchases, subscriptions, billing, and refunds under their own terms and privacy notices.

8. AI weather summaries

Meteogram may optionally generate a short human-like weather-condition description. To do this, the app sends derived weather-condition data and fallback forecast text through our Cloudflare-hosted endpoint to OpenAI. This request is designed not to include your name, account identity, exact coordinates, or precise place name, and we do not use it to identify you.

9. International transfers

Some recipients listed above may process data outside the European Economic Area. Where applicable, transfers rely on the provider's lawful transfer mechanism described in that provider's documentation.

10. Storage and retention

On-device data - remains on your device until overwritten, cleared, or removed when you uninstall the app.
Location and search requests sent to third parties - are retained according to the receiving provider's own practices.
RevenueCat purchase data - is retained according to RevenueCat's and the app store's policies.
Anonymous analytics events - are retained according to Aptabase's retention practices and are used only in aggregate to understand app usage and improve Meteogram.
AI summary requests - derived weather summary inputs and outputs may be cached temporarily by our server infrastructure to improve performance and reduce repeated requests.

11. Your GDPR rights

Subject to the conditions and limits in applicable law, you may have rights of access, rectification, erasure, restriction, objection, and portability where applicable. To exercise these rights, contact mpenapps@protonmail.com.

12. Complaints

If you are in the EU, you have the right to lodge a complaint with your local supervisory authority. If you are in Greece, you can contact the Hellenic Data Protection Authority at dpa.gr.

13. Children's privacy

Meteogram is not directed to children under 13, and we do not knowingly collect personal data from children through the app.

14. Changes to this policy

We may update this policy from time to time. If we make material changes, we will update the date at the top of this page.

15. Contact

For privacy questions, requests, or complaints, email mpenapps@protonmail.com.