Use your phone's in-built microphone as a loudspeaker hearing aid or as a microphone.
All you need is to put stereo cable in your phone's jack.

This application is equipped with advanced modes including:
1- Noise filtration
2- Sports Mode
3- Theater Mode
4- Meeting Mode and
5- Conversation Mode

Please feel free to send us feed back if you need more options to be included in this application.