Timer | Interval vs RoundFlow
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Timer | Interval
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Timer | Interval is a clean, focused interval timer for HIIT, Tabata, EMOM, AMRAP, boxing rounds, HYROX, CrossFit, circuits, and gym training. Start fast with ready-made workout timers or build your own custom work/rest flow. The full-screen timer stays readable while you train, with clear audio cues, voice countdown options, and haptics so you don't have to keep checking the screen. Features: • 17 ready-made timers across HIIT, Tabata, EMOM, AMRAP, sprint, HYROX, CrossFit, boxing, and functional formats • Custom timer builder with work, rest, warm-up, and cool-down intervals • Big animated countdown display for active workouts • Landscape timer view for side-on training setups • Timer sound, voice countdown, and haptic options • Favourites for one-tap access to the timers you repeat • Dark, distraction-free interface designed for iPhone and iPad Optional Pro Upgrade: • Lifetime Pro unlock — one-time purchase, no subscription • Unlimited custom timers • Premium workout timers • Premium themes • Premium sound and haptic controls • Future Pro improvements Built for athletes who want a timer that gets out of the way and keeps them moving.
RoundFlow
This app provides a customizable interval timer for various combat sports and fitness routines. It seamlessly integrates with music apps, allowing your playlist to continue uninterrupted during workouts. Features include coach voice prompts, combo calls, and workout tracking.
- Music integration with Spotify, Apple Music, YouTube Music
- Customizable round, rest, and warm-up/cool-down timers
- Recorded coach voice and combo callouts
- Workout tracking with calendar and streaks
- Apple Watch companion app with haptic feedback
- Workout art generation for social sharing
- Group session synchronization
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RoundFlow is the round timer you can pay for once and keep forever, and it doesn't kill your music. It keeps timing with the screen locked, ducks your music for the bell, then hands the volume straight back. Start Spotify, Apple Music or YouTube Music, hit START, lock the phone and train. Your playlist never stops. A COACH IN YOUR CORNER • A real recorded coach voice calls your rounds, rests and the final "3-2-1" • Combo calls shout live combinations — "Jab, cross, hook!" • Bell, coach voice and haptics — or switch to a built-in system voice BUILT FOR EVERY ROUND • Boxing, Muay Thai, MMA, kickboxing, taekwondo, karate, CrossFit, HIIT, Tabata, sprints & running • Two custom profiles free, unlimited with Pro: rounds, round time, rest, warm-up, cool-down and warning • A big, glanceable timer ring you can read from across the gym RUN & SPRINT • Roadwork — a GPS run tracker built for fighters: distance, pace, kilometre splits and a goal for the session • Sprints — interval sprint sessions with the same bell, coach voice and rest countdown as your rounds • Every run lands in the same training log as your rounds MADE TO SHARE • Workout DNA — every session draws a one-of-a-kind piece of art from your training, ready for Instagram Stories • Your RoundFlow Year — a Wrapped-style recap of everything you've put in • Challenge a friend — send any workout as a link, then compare your scores TRAIN TOGETHER • Group sessions in perfect sync — everyone hears the bell at the same moment • Present mode — mirror the timer to a TV or projector for the whole class TRAIN WITHOUT LOOKING • Live Activity & Dynamic Island keep the round live on your Lock Screen • Apple Watch companion — a haptic on every bell, plus live heart rate, punch count and Effort Score. Leave the phone in your bag • Runs in the background with the screen off TRACK YOUR WORK • An automatic training log of every session, with a calendar and streaks • Stats: total workouts, time on the mat, weekly activity and trends • Earn belts and badges as you put in the rounds RoundFlow Pro unlocks unlimited profiles, the recorded coach voice and combo calls, the full Apple Watch experience (heart rate, punch tracking and Effort Score), group hosting, and complete stats and trends. Try Pro free for 7 days, or unlock everything forever with a one-time Lifetime purchase. The only timer that lets your music play. Ring the bell. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://zakin02.github.io/roundflow/privacy.html
Screenshots
Verdict
The clearest difference is iOS requirement: Timer | Interval at 15.1 against RoundFlow's 17.0. On price, update cadence, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Timer | Interval sells 1 one-off in-app purchase and RoundFlow sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.
Timer | Interval ships an update every 10 days, RoundFlow weekly. The most recent releases landed on September 18, 2026 and September 24, 2026 respectively.
| Parameter | Timer | Interval | RoundFlow |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 10 days | Weekly — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | — | Freemium |
| Devices | iPhone, iPad, iPod — better | iPhone, Apple Watch |
| Requires iOS | 15.1 — better | 17.0 |
| Further details — not scored | ||
| Size | 44 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | MICAH JOHN WALKER | Zakaria Elkassmi |
In-app purchases
Timer | Interval
- Timer | Interval$2.99
RoundFlow
- RoundFlow Pro (Monthly)$2.991 Month
- RoundFlow Pro (Yearly)$7.991 Year
- RoundFlow Pro (Lifetime)$24.99
Questions
Is Timer | Interval free?
Is RoundFlow free?
Do Timer | Interval or RoundFlow have ads?
Which is updated more often, Timer | Interval or RoundFlow?
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