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Fein
Open-source credits

Built on other people’s work.

Fein stands on software that many people wrote and chose to share. We are grateful to them. This page names what the Fein apps are built from and the outside services they use.

Software reports

Every package, with its licence.

One report for each phone. Each lists the packages that are part of the app on that phone, with the version, the licence and the copyright notice, and then the full text of each licence.

What these reports cover. They list the software packages the Fein apps are built from, the engine that runs them and the fonts. The iPhone and Android build tools also add native libraries when the apps are compiled. Those libraries are not listed here yet.
Outside services and SDKs

What Fein uses besides its own code.

A service is a company whose systems the app or Fein’s server talks to. An SDK is ready-made software inside the app. What each service receives is in the Privacy Policy.

Services

  • Hosts Fein’s database, sign-in and file storage, and runs Fein’s server code.
    In use
  • Provides the map, finds the places you search for, gives a street address when your phone cannot, and matches your trips to the roads you drove.
    In use
  • Looks up the speed limit of the road you are on while you drive, for speeding alerts.
    In use
  • Delivers push notifications and app updates, and measures how fast the app starts.
    In use
  • Apple iPhone
    Delivers push notifications to iPhones, provides Sign in with Apple, and turns coordinates into a street address on the phone.
    In use
  • Provides Google sign-in. On Android it also delivers push notifications and turns coordinates into a street address on the phone.
    In use
  • Sends the SOS text message to your emergency contact.
    In use
  • Sends Fein’s emails: sign-in links and codes, password resets, security notices and the message that your data export is ready. It sends from the European Union (Sweden).
    In use
  • Sends the same emails when Amazon cannot, and hosts the support mailbox.
    In use
  • Checks and keeps track of subscriptions to paid plans.
    Included in the app; stays off until billing is turned on
  • Receives crash reports.
    Included in the app, switched off
  • Cloudflare Website
    Hosts this website.
    In use

SDKs inside the apps

  • The framework the apps are built with.
    In use
  • The engine that runs the app’s JavaScript.
    In use
  • Ready-made parts of the app: notifications, location, motion sensors, secure storage, app updates and app performance.
    In use
  • Draws the map on the phone.
    In use
  • Connects the app to Supabase.
    In use
  • The software behind Google sign-in.
    In use
  • Connects the app to Adapty.
    Included in the app; stays off until billing is turned on
  • Sends crash reports to Sentry.
    Included in the app, switched off
Maps and data

Where the map and its data come from.

What the apps use today.

  • Street map
    Map tiles from Mapbox, built on OpenStreetMap data. © Mapbox © OpenStreetMap contributors. OpenStreetMap data is available under the Open Database License.
  • Satellite map
    Imagery from Mapbox and Maxar. © Mapbox © Maxar.
  • Places, addresses and trips
    Place search, street addresses for coordinates and the matching of trips to roads come from Mapbox.
  • Speed limits
    Posted speed limits come from TomTom.
Fonts and icons

The type and the icons.

Each is used under its own licence, and the full text is in the reports.

  • Text in the apps and on this website.
    OFL-1.1 Copyright 2016 The Inter Project Authors (https://github.com/rsms/inter)
  • Arabic text in the apps.
    OFL-1.1 Copyright 2009 The Cairo Project Authors (https://github.com/Gue3bara/Cairo)
  • Icons in the apps. The icons on this website come from the same Lucide set.
    ISC Copyright (c) 2026 Lucide Icons and Contributors
  • Icon fonts on Android.
    MIT AND Apache-2.0 Copyright (c) 2020 Expo

Something missing or wrong? Email [email protected].