IntervalRunner vs SumCha

Run every interval exactly as planned. IntervalRunner checks your pace against your target and tells you the moment you drift — by voice, by tone and with a tap on your wrist — so you never have to look at the screen. ALERTS YOU CAN TRUST • Smoothed pace instead of jumpy GPS, with a tolerance band you choose • Different tones and haptics for too fast and too slow • Natural AI-generated voice cues that lower your music and keep working with the screen locked BUILD ANY INTERVAL • Time or distance steps with a target pace or speed • 7 ready-to-run presets: walk-run starter, 1 min fast / 1 min easy, 400 m and 800 m repeats, tempo, slow running and Zone 2 (Zone 2 with Pro) • Three count modes: start when you reach target pace, count only while on target, or count right away • Auto-pause per workout, km or miles, pace or speed WITH OR WITHOUT APPLE WATCH With Apple Watch, the watch measures and taps your wrist while iPhone shows the numbers and speaks. No watch? Run with iPhone alone — or with just the watch. Treadmill mode needs no GPS: run on time at the speed you set on the machine, then confirm the distance from its display. After each run, see target vs. actual for every step. Workouts are saved to Apple Health. SHARE SHOTS Turn any run into a photo, video or Live Photo with your stats — free. • Your own photo or video (up to 15 s) or one of 8 designed themes (4 free), with stickers and text in 13 fonts • Save as a GIF or video too: numbers count up from zero and the route draws itself FREE Everything you need to run: the builder, presets, all alerts and count modes, treadmill mode, unlimited history, Apple Health, Live Activity, GPX/JSON export and 3 saved workouts of your own. Step analysis is open for your first two runs. The free version shows ads, never during a run. INTERVALRUNNER PRO • No ads • Step analysis, trends and personal bests • Heart-rate zone targets, and recovery that ends when your heart rate drops • Unlimited saved workouts and folders • Nested repeats and ladder, pyramid and Yasso 800 generators • Per-second CSV export • 4 premium themes and 3 premium templates (Gradient, Big route, Titanium) for share shots, plus logo-free share shots • Recap share shots: weekly, monthly and yearly totals • Route views for share shots: bird's-eye, oblique and isometric (top-down is free) Heart-rate features need Apple Watch or a Bluetooth heart-rate monitor. SUBSCRIPTION IntervalRunner Pro is an auto-renewing subscription, available monthly or yearly. The price is shown in the app and varies by country or region. The yearly plan includes a 7-day free trial for eligible new subscribers; the monthly plan has no trial. Payment is charged to your Apple Account when you confirm the purchase, or when the free trial ends. The subscription renews automatically unless canceled at least 24 hours before the end of the current period. Manage or cancel anytime in Settings > [your name] > Subscriptions. Any unused portion of a free trial is forfeited when you purchase a subscription. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://juki-j.github.io/privacy-policy/intervalrunner-en.html PRIVACY No account and no server of ours. Your runs, routes and health data stay on your devices and are never sent to us, to advertisers or to analytics. Ads in the free version come from Google AdMob, personalized only if you allow tracking. The Meta SDK measures our own Facebook and Instagram ads (installs, free trials and subscriptions); it never receives workout, health or GPS location data. Firebase collects crash reports and usage statistics to keep the app stable; they are never used to track you or for ads. If you allow it, workouts are saved to Apple Health, which Apple manages and syncs. Voice cues are AI-generated speech.

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.