Diagnosis
The app and faucet light are out of sync. The TDS sensor data isn't updating correctly in the app.
How to Fix It
Manually reset the filter life in the Frizzlife app. Go to the device page. Tap 'Filter Life'. Tap the reset button for the filter in question. Confirm. Then pull out the plug from the smart faucet base and plug it back in. This forces a resync.
If That Didn't Work
The problem may be the TDS sensor probe in the filter housing. Unplug the system. Remove the final stage filter. Check the two metal sensor pins inside the housing. Clean them with a cotton swab and white vinegar. Reinstall the filter and plug the unit back in.
Heads Up
The faucet light color (blue/yellow/red) is based on real-time TDS. The app percentage is just a timer. Always trust the faucet light for actual water quality.