Description
20 Seconds is an Apple Watch timer designed for slow, controlled strength-training repetitions. Each repetition lasts 20 seconds. Strong haptic cues help you stay on pace without repeatedly looking at your Watch. A repeating pattern of one, two, or three haptic alerts identifies the beginning of each repetition, and four alerts mark the halfway point. The app can display your live heart rate during an active workout. Pressing Stop ends the timer, workout session, and continuous heart-rate collection.
What's New
Version 2.1 2026-09-07
Added a live heart-rate display and workout-status indicator. Pressing Stop now ends workout mode and heart-rate monitoring. Also includes a new icon and an on-... Technical Analysis
Package Overview Basic metadata
Bundle ID
com.knotonline.SuperSlow Current Version 2.1
Minimum iOS 15.6
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