the Fitbit mobile app
Simple single-purpose app that gets the balance of crypto fund in your Kraken account and displays them in either USD or EUR.
1. Request API key from Kraken (log in > settings > API)
2. Only give the key permissions to request balance
3. Use phone settings to enter API Key and Secret
4. Launch the app from your wrist. Tap results to reload.
The creator of this app is not affiliated with Kraken in any way.