Works good
I have the actual Baby Shusher as well. The app doesnt have as clear of a shushing sound (Im picky like that), but its hardly noticeable and Im certain its due to my iPhones (5s) much smaller speaker. I like how I have more control with the app however such as timer longer than just 30 minutes and my own custom shushing sound as my baby daughter also likes a quicker descending shushing sound at times too. I would definitely recommend the app.
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Baby Shusher Sleep Miracle App