IntervalKit vs SumCha

IntervalKit is a simple and powerful interval training app for runners. Set your intervals, work and rest durations, and let IntervalKit guide you through your workout with voice prompts and live countdowns. FEATURES • Time-based or distance-based intervals • Voice guidance — spoken phase announcements and countdown • Live Activity on Dynamic Island and Lock Screen • Optional warmup and cooldown phases • Step counting and cadence tracking • Works indoors — no GPS required for time mode • Slovak and English language support

Pick, tap, run. A simple, clean interval running app. · Choose a program like 2 min run / 1 min walk and just tap start · The running screen puts the current interval and time left up front, big and clear · Voice, haptics, and a 3-2-1 countdown tell you when intervals change · Apple Watch: wrist haptics and voice cues for every interval, and race your last run (Pro, 3 free runs) · Pacemaker to run alongside your past runs, and a leaderboard that calls out new records · Build your own: warm-up, run, walk, repeats, cool-down · When a set ends you keep going as a free run, or add one more set · Start, pause, and end from the Lock Screen, Dynamic Island, widgets, and Control Center · Auto-pause when you stop, resume when you run · Distance, pace, and calories (uphill included), weekly/monthly/yearly summaries, and your route on a map · Findings and detailed analysis show how your running is trending (Pro) · Save your runs to Apple Health as running workouts · Sync your history across your devices through your own iCloud (the developer can't see it) Free to use, with no ads on the running screen. One purchase removes ads, or go Pro for Apple Watch and Insights too.