When comparing Nightly vs SleepRate, the Slant community recommends SleepRate for most people. In the question“What are the best Android sleep tracking apps?” SleepRate is ranked 4th while Nightly is ranked 5th. The most important reason people chose SleepRate is:
SleepRate tracks hear rate, audio, and stress to determine which environmental factors effect users the most.
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Pros
Pro Compares sleep quality to several variables
SleepRate tracks hear rate, audio, and stress to determine which environmental factors effect users the most.
Pro Very detailed dashboard
The dashboard displays sleep quality on a nightly basis or compares multiple nights. It also breaks down different levels of sleep in a chart and how much time was spent awake during the night.
Pro Tracks sleep using heart rate
Instead of tracking sleep by frequency of movement during the night, SleepRate tracks sleep by monitoring heart rate through the sleep enhancement kit.
Cons
Con Battery killer
Can use up 50% of your watch battery in one night.
Con Sleep improvement kit must be purchased separately
The "sleep improvement kit" containing the heart monitor costs an extra $99 and is crucial for the app's functionality.
Con Uncomfortable monitor
The heart rate monitor that must be used with SleepRate is uncomfortable to wear.