Comparison

Interval Timer vs IntervalFlow

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Interval Timer

This professional and easy-to-use interval timer allows for customizable circuit training plans with voice prompts and background operation. It supports music integration and Apple Health, making it ideal for various fitness routines.

Highlights
  • Customizable training plans
  • Smart voice prompts
  • Automatic music playback
  • Background operation
  • Apple Health integration
  • Apple Watch support
Features
Read full description

Congratulations! You have found the most professional and easy-to-use Interval Timer in App Store. This is different from those with complex operation or gaudy functions. It is easy to set up all kinds of circuit training plans. You can custom your exercise library, adjust theirs duration flexibly, and the dial interface is the settings page that allows you to complete most of the normal operations. WYSIWYG! Next time you work out, maybe you’d like to try this practical voice coach fitness app! This app also has more powerful and practical functions. It includes warm-up, cold-down, recover and work out sessions, and also theirs duration can be changed flexibly. It can change the music automatically during your workout if you have subscribed the apple music service. This app is suitable for personal trainers, fitness enthusiasts, bodybuilders, athletes, home exerciser and etc. Use with HIIT, Tabata, weight training, kettlebells, HIIT running, sprints, HIIT treadmill, and any interval fitness training. Help to establish a scientific, systematic, based on your characteristics and personalized training program and maximize your workout are all we can do. Depends on no equipment and exercise anywhere or anytime! Hope you enjoy it. AT A GLANCE: + Easy to customize you training plan + Smart voice prompts + Automatically play and change music + prompts the next workout name + Fully customizable times, cycles and repeats + Can run in the background + Clean and smart design + Great on iphone X + Support Siri ("Hey Siri, start a workout using Fit Now") + Support Apple Watch, Standalone Apple Watch workouts. Leave your iPhone at home! + Apple Health integration MORE INFORMATION: • Easy Customize Touch what you want to change to set work time, rest time, cycles, repeats, warm up time and cooldown time. Stopwatchs can be set in 1 second increments up to 60 minutes! • Customize your training plan You can custom every single attribute like moves and its duration, and accordingly the voice system will prompts you what the next move is. • Smart voice prompts system this app will alerts you when it is time to work, rest, warmup or cooldown, even when this app is running in the background. You can preset your workout names for per cycle, and this app will call out them while the timer begins working. You can turn off the voice prompts, and choose the vibration mode. • Automatically play music this app allows you to set different playlists for each of the work duration, rest duration, warm up duration and cool down duration, and is easy to change the currently playing song in iPhone control center. Or you can just choose any music app you like, this app supports multitasking. • Runs in the background When the timer starts working, you can lock screen and run it in the background, and have it play voice prompts. Once your training plan ends, it won't run in the background any more, in case of more battery drain.

About

IntervalFlow

Features
Read full description

A HIIT and interval timer that stays out of your way. No ads. No tracking. Nothing interrupts your workout. WHY INTERVALFLOW • No ads, ever — not a banner, not a video, not between rounds. Your countdown is never covered and your audio is never cut. • No tracking — no analytics, no advertising identifier, no account. Your workouts stay on your device. • Live Activity and Dynamic Island — the current phase, the countdown, and the round stay on your Lock Screen. Check mid-set without unlocking. BUILT FOR REAL WORKOUTS • Ready-made presets: Tabata, HIIT 40/20, EMOM, boxing rounds, and multi-set circuits. • Custom builder: prepare, work, rest, rounds, sets, rest between sets, and cooldown — to the second. • A countdown you can read across the room, with each phase in its own colour: work, rest, get ready, cooldown. • Sound, haptics, and voice cues, so you can keep your eyes off the screen and on the set. IT KEEPS THE RECORD • Every finished session is logged on its own — time, rounds, and an estimate of calories. • A daily streak and a weekly count, for the weeks when motivation needs a number. Made for HIIT, Tabata, cross-training, boxing, running intervals, stretching, EMOM, and circuits — at the gym or on your living room floor. Open it, tap a preset, and start. That is the whole app.

Screenshots

Interval Timer4 screens
IntervalFlow4 screens

Verdict

The call

The clearest difference is in-app purchases: IntervalFlow at none against Interval Timer's 1. Interval Timer's advantage is update cadence (weekly vs every 4 weeks) and iOS requirement (11.0 vs 17.0). On price, ads and device support 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Interval Timer sells 1 one-off in-app purchase. IntervalFlow asks for nothing beyond the download.

UpkeepUpdate frequency

Interval Timer ships an update weekly, IntervalFlow every 4 weeks. The most recent releases landed on September 16, 2026 and September 18, 2026 respectively.

Scorecard3 real differences · 7 level
Interval Timer versus IntervalFlow: the parameters behind the verdict, then further details
ParameterInterval TimerIntervalFlow
PriceFreeFree
Rating3.8 (28 ratings) — better—
Positive reviews66.7% of reviews—
Number of ratings28 — better—
Update frequencyWeekly — betterEvery 4 weeks
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree—
DevicesiPhone, iPod, Apple Watch — betteriPhone, iPad
Requires iOS11.0 — better17.0
Further details — not scored
Size30 MB1 MB
Age rating4+4+
Developer宇超 朱Hyunwoo Lee

In-app purchases

1 purchases

Interval Timer

One-time1
  • UNLIMITED HIIT TIMER$3.99
None

IntervalFlow

No in-app purchases

Questions

Is Interval Timer free?
Interval Timer is free to download, with in-app purchases available.
Is IntervalFlow free?
IntervalFlow is free to download, with no in-app purchases.
Do Interval Timer or IntervalFlow have ads?
Neither Interval Timer nor IntervalFlow shows ads.
Which is updated more often, Interval Timer or IntervalFlow?
Interval Timer ships an update weekly, and IntervalFlow every 4 weeks. Most recently, Interval Timer was updated on September 16, 2026 and IntervalFlow on September 18, 2026.

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