Android shows the microphone.
You will see an ongoing notification and Android's microphone indicator while listening is on.
Can't remember where you left it?
Or whistle. That works too.
ClapWhistle listens on your nearby Android phone. When it hears the sound you picked, your phone rings, vibrates, and flashes so you can follow it.

01 / How to find your phone
Two claps are a good place to start. You can change the number of claps and test both sounds before putting the phone down.
Android keeps a notification on screen while the microphone is in use, and you can stop listening from there at any time.
Your phone can ring, vibrate, and flash. Follow the alert, then stop it from the phone or its notification.

02 / Make it work in your room
A quiet bedroom is not a busy kitchen. Start with the Normal room setting, try a few claps or whistles, then adjust only if the phone misses you or goes off by mistake.
This is for a phone that is close enough to hear you. It is not GPS tracking, and closed doors, bags, and room noise can shorten the range.
03 / Your microphone
While listening is on, ClapWhistle checks small pieces of sound for a sharp clap or one steady whistle. Each piece is thrown away as soon as it has been checked.
Read the privacy policy in plain languageNo recordings
No audio uploads
No account needed
Sound detection works without internet
The app may use the internet for ads and basic app reports, but microphone audio is not part of them.
04 / What Android allows
You will see an ongoing notification and Android's microphone indicator while listening is on.
Modern Android will not quietly restart the microphone. ClapWhistle shows a notice you can tap.
Some Samsung, Xiaomi, Oppo, Vivo, and other phones pause apps more aggressively than others.
Google Play
The latest release is still in Google Play review, so there is no public download page yet. This site will link to it as soon as it is live.
Somewhere under the couch, your phone is getting nervous.