How do I record audio secretly on Android?

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Tags

1. #audio
2. #thrice
3. #whenever
4. #within
5. #recording
6. #store
7. #secretly
8. #press
9. #button
10. #install
11. #android
12. #seconds
13. #power
14. #record
15. #device
16. #start
17. #voice
18. #recorder
19. #sound
20. #secret
21. #google