The app plays a series of tones that can help you test your phone speakers.
3 Ultimate speaker testing modes.
Volume booster mode helps testing the speaker at boosted volume.
A frequency tone generator is also provided to generate various sound waves between a frequency of 1 Hz - 25000 Hz.
Choose between 7 classic waveforms.
Note: This app does not remove water from your iPhone. This is not a volume booster app