Comparison

Best Interval Timer vs Interval Flow

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

Head to head
About

Best Interval Timer

This app acts as your personal coach, guiding you through workouts with customizable routines. Focus on your exercise while it manages timing for warm-up, high/low intensity intervals, cool-downs, and rest periods.

Highlights
  • Customizable workout routines
  • Warm-up, intensity, cool-down, rest periods
  • Background and multitasking support
  • Adjustable interval sounds and vibrations
  • Workout practice tracking
  • Landscape and portrait orientation
Features
Read full description

This app is like your personal coach, just focus on your workout without having to worry about time, Best Interval Timer will lead you to finish them perfectly. There is one default routine in this free version, but you can edit it to your own one which include warm-up, high/low intensity, cool down and rest time etc, you can custom as many sets as you wish to do. Key Features: ⁃ One default routine. ⁃ Big readable counting down time. ⁃ Start, pause or reset routine. ⁃ Warm up, low intensity, high intensity, cool down, rest time. ⁃ Support background, foreground playing and multitasking. ⁃ Music plays. ⁃ Vibrate or not. ⁃ 15 interval switch sounds. ⁃ 12 background interval pictures available. ⁃ Show number of times you have practiced of one routine. ⁃ Support landscape and portrait. ⁃ Create one reminder to alert you doing your workout. ⁃ Supports universal version. If you have any question or suggestion, please send email to our support userfeed@vip.tom.com.

About

Interval Flow

This app revolutionizes fitness routines with deep customization and advanced tracking for various activities like HIIT, Yoga, and CrossFit. It allows users to create, share, and follow personalized workouts with features like color-coded intervals, real-time progress tracking, and voice assistance.

Highlights
  • Color-coded intervals
  • Customizable circuits
  • Real-time progress tracking
  • Voice assist and search
  • Exercise library
  • Workout sharing
Features
Read full description

Interval Flow: Experience a Workout Revolution Interval Flow is your ultimate fitness companion, designed to transform your workout experience with deep customization and advanced tracking. This versatile app is perfect for a wide range of activities including HIIT, TABATA, CrossFit, Yoga, Pilates, Meditation, and more. With Interval Flow, you can stay focused on your fitness goals while the app handles the details. Key Features: - Color-Coded Intervals: Customize your workout visually with color-coded intervals. Set distinct colors for warm-ups, high-intensity bursts, rest periods, and more, to easily navigate through your routine. - Exercise Library: Build your workouts with ease! Add new exercises or select from the existing ones to tailor your workout to your specific needs. - Real-Time Progress Tracking: Keep a live tab on your workout progress. The dynamic interval list updates in real-time, ensuring you know exactly where you are in your routine. - Customizable Circuits: Create the perfect workout sequence by arranging various exercises into repeatable circuits tailored to your fitness level and goals. - Personalized Interval Warnings: Get timely alerts before an interval ends. Customize the warning sounds to suit your style, ensuring smooth transitions without missing a beat. - Interactive Workflow: Enjoy crafting your workouts with a user-friendly interface that’s as intuitive as it is functional. Setting up your ideal workout regime is now as engaging as the workout itself. - Voice Assist: Let our advanced voice assist guide you through your exercises, announcing what’s next so you can remain focused on your form and intensity. - Voice Search: Quickly find your favorite workouts using voice commands, making your preparation seamless and hands-free. - AirShare: Share your custom workouts with friends or clients effortlessly using AirDrop, enhancing connectivity and interaction. Why Choose Interval Flow? With Interval Flow, you don't just exercise, you experience a revolution in workout efficiency and enjoyment. The app’s intuitive interface and comprehensive customization options make it the optimal companion for anyone serious about fitness. Whether you're powering through a high-intensity session or seeking tranquility in yoga, Interval Flow adapts to your pace and preference. Unlock your potential with Interval Flow – where your workout meets innovation. Interval Flow Subscription: The app includes a 1 month long auto-renewable subscription with a 3-day free trial, which will unlock premium features, like unlimited workouts, timer program editing and autoplay and costs $4.99/ month. It will be charged to your credit card through your iTunes account and will automatically renew unless you canceled at least 24 hours before the end of the current period. Any unused portion of a free trial period will be forfeited when you purchase the subscription. Though your subscription for the current month cannot be canceled, you can turn auto-renewal off in your account settings after purchase. See the instructions here: https://support.apple.com/en-us/HT202039 You can read the terms of use and privacy policy here: https://kapi90.github.io/hiit_timer_privacy_policy.html End User License Agreement (EULA) of the App Store applies: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Best Interval Timer4 screens
Interval Flow4 screens

Verdict

The call

Best Interval Timer and Interval Flow both sit at 4.6 stars, but that hides the real split: 89% of Best Interval Timer's written reviews are positive against 48% of Interval Flow's. Best Interval Timer also leads on in-app purchases (none vs 10) and iOS requirement (16.0 vs 18.6). Interval Flow's advantage is ads (none vs shown) and update cadence (fortnightly vs every 12 months). On price, rating, ratings volume 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 Flow sells 10 in-app purchases, starting at $4.99 per 3 months. Best Interval Timer asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.6 for Best Interval Timer against 4.7 for Interval Flow. Both are backed by a comparable volume of ratings — 81 and 168 respectively. Written reviews are what separate them: 89% of Best Interval Timer's written reviews are positive against 48% of Interval Flow's.

UpkeepUpdate frequency

Best Interval Timer ships an update every 12 months, Interval Flow fortnightly. The most recent releases landed on September 18, 2026 and September 5, 2026 respectively.

Scorecard6 real differences · 4 level
Best Interval Timer versus Interval Flow: the parameters behind the verdict, then further details
ParameterBest Interval TimerInterval Flow
PriceFreeFree
Rating4.6 (81 ratings)4.7 (168 ratings) — better
Positive reviews89.3% of reviews — better48.1% of reviews
Number of ratings81168 — better
Update frequencyEvery 12 monthsFortnightly — better
AdsYesNo — better
In-app purchasesNo — betterYes
MonetizationAd-supported — betterSubscription
DevicesiPhone, iPadiPhone, iPad
Requires iOS16.0 — better18.6
Further details — not scored
Size19 MB20 MB
Age rating4+4+
Developer倩 赵Bence Kaposzta

Customer experience

Best Interval Timer

All ratings81 ratings
Positive92.6%
Neutral4.9%
Negative2.5%
Written reviews103 reviews
Positive89.3%
Neutral6.8%
Negative3.9%

Interval Flow

All ratings168 ratings
Positive93.5%
Neutral2.4%
Negative4.2%
Written reviews27 reviews
Positive48.1%
Neutral18.5%
Negative33.3%

Bugs and requests

Best Interval Timer

Reported bugs

7 issues
  • App stops working after rating notification
  • Buttons don't work after rating notification
  • Crashes when saving timers
  • Crashes when editing exercises
  • Freezes and stops working
Show 2 more
  • Lost all timers after reinstalling
  • Side view unusable

Requested features

10 requests
  • Ability to save multiple intervals/routines
  • Voice cues for start/stop
  • Apple Watch compatibility
  • Larger buttons and text
  • Option to save different schedules (e.g., Tabata)
Show 5 more
  • Fix crashing when saving timers
  • Fix crashing when editing exercises
  • Improve side view usability
  • Remove ads or reduce frequency
  • Option to have cool down at the end of all intervals

Interval Flow

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Best Interval Timer

No in-app purchases

10 purchases

Interval Flow

Subscriptions8
  • 3 Month$4.993 Months
  • 1 Month$9.991 Month
  • 1 Month, 3 day trial3 Days trial$9.991 Month
Show 5 more
  • Annual7 Days trial$14.991 Year
  • 1 Year discounted$25.951 Year
  • 1 Year, 3 day trial3 Days trial$39.991 Year
  • 1 Year$39.991 Year
  • 1 Year Intro month1 Month trial$39.991 Year
One-time2
  • Free Lifetime subscriptionFree
  • Lifetime$24.99

Questions

Is Best Interval Timer free?
Best Interval Timer is free to download, with no in-app purchases.
Is Interval Flow free?
Interval Flow is free to download, with in-app purchases available.
Which has better reviews, Best Interval Timer or Interval Flow?
Interval Flow is rated higher. Best Interval Timer averages 4.6 out of 5 from 81 ratings, while Interval Flow averages 4.7 from 168 ratings.
Do Best Interval Timer or Interval Flow have ads?
Best Interval Timer shows ads; Interval Flow does not.
Which is updated more often, Best Interval Timer or Interval Flow?
Best Interval Timer ships an update every 12 months, and Interval Flow fortnightly. Most recently, Best Interval Timer was updated on September 18, 2026 and Interval Flow on September 5, 2026.

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