Sleep Time uses a 90-minute cycle to help users set their alarm to a time that will help them wake up rested and refreshed. The tool can estimate the ideal bed or wake-up time using a fine-tuned formula.
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Sleep Time uses a 90-minute cycle to help users set their alarm to a time that will help them wake up rested and refreshed. The tool can estimate the ideal bed or wake-up time using a fine-tuned formula.
I can't say whether it's real or just placebo but I do seem to wake up more refreshed when I set my alarm to a time suggested by this app.