Finding Tuner For Musical Instrument

Criteria:  simple to use

Try:

1. Tuner - DaTuner (Lite!)
Link: https://play.google.com/store/apps/details?id=org.cohortor.gstrings

- V simple to see in tune

2. Tuner - gStrings Free
Link:  https://play.google.com/store/apps/details?id=org.cohortor.gstrings

- too technical to follow

Choice: 1