Make sure your Android app meets these requirements before deploying it to Finix-supported PAX terminals.
You can deploy your own apps to the following Finix-supported terminals:
See each device page for developer specifications such as the Android version and screen resolution.
The SDK has a minSdkVersion of Android API Level 26 (Android 8.0)+.
- Build your app as a standard Android APK targeting the Android version of your terminal models.
- Each release must have a unique
versionCode. Terminals only move forward: to replace a release, publish a higher version. - Apps are signed and distributed through PAX's app management platform. You do not distribute builds to production terminals directly.
PAX terminals are payment devices first, so they differ from consumer Android hardware:
- No Google Play: Apps are distributed through PAX's app management platform, not the Play Store. Do not depend on the Play Store for installs or updates.
- Google Mobile Services: Services such as Google Maps and Firebase may be limited or unavailable. Verify any Google-dependent functionality on a debug device before you build around it.
- No production debugging: Android Debug Bridge (
adb) is only available on debug devices purchased from PAX. Production terminals cannot sideload apps or attach a debugger. For more information, see Testing Your App.
- Use the Finix Android SDK for PAX Device Readers for all card processing. Your app must not read, store, or transmit card data itself.
- Remote key injection: The Finix Android SDK for PAX Device Readers uses key slot 3 in Sandbox and key slot 4 in Production. If your app uses remote key injection, avoid using either of these key slots.
If you're unsure whether your app meets these requirements, reach out to your Finix point of contact or email support@finix.com.