Volume control problems
The app is fairly simple and works well. However, there are a lot of errors that occur with volume control. Take one example: when another application takes control of the volume (e.g. a phone call) SimplyNoise will resume playback as expected but no sound will play. It is as if the internal playback volume of the app is not syncd correctly to the volume of the iPhone itself.
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SimplyNoise - Free White Noise, v1.3