Sleep Calculator vs Zynk
Neck and neck on boosts. Profiles, pricing and deals below.
Sleep Calculator
Sleep Cycles, REM & Wake Up Time
community boosts
⚡ 0
pricing
Freemium
what it is
Use Sleep Calculator to find the best time to go to bed or wake up based on 90-minute sleep cycles. Calculate REM sleep, ideal sleep time, and wake up refreshed
Zynk
Direct File Transfer Between All Your Devices
community boosts
⚡ 0
pricing
Freemium
what it is
Transfer files directly between any devices — phone, laptop, server. No size limits, end-to-end encrypted. Free for macOS, Windows, Linux, iOS, and Android.