Free version doesn't do much – Sonosync - relaxing music for sleep and meditation Review

This app is a pretty decent free app, but it's not much more than an audio player. I didn't see anything that would support the claim of matching your heart rate. And the picture and music selections are pretty limited. My sense was that you could easily do the same thing with any audio player like the iOS Music app. Having said that, the audio samples the free version has are not bad. The sleep timer is a neat twist. The frustrating thing was that the app offers the feature in the user interface, not grayed out. Then if you select the feature, such as the tempo, it prompts you to upgrade. The free version does give one a sense of what the app is all about.
Review by CL500000 on Sonosync - relaxing music for sleep and meditation.