Comparison

Interval Flow vs Round Timer

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

Head to head
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/

About

Round Timer

This interval timer offers extensive customization for workouts, training, or any timed activity. Features include custom presets, sound libraries, voice announcements, and detailed session tracking. Enjoy an intuitive, ad-free experience designed for flexibility.

Highlights
  • Customizable colors
  • Custom presets
  • Rich sound library
  • Voice announcements
  • Proximity sensor support
  • Shake-to-pause
  • Detailed session summaries
Features
Read full description

Round is the ultra-customizable interval timer designed to supercharge anything you do. It’s packed with features like customizable colors, custom presets, a rich library of sounds, voice announcements, proximity sensor support, shake-to-pause, and precise time entry. Track your sessions with detailed summaries, enable tick sounds, and enjoy an intuitive, ad-free interface. Perfect for any activity, from sports to work.

Screenshots

Interval Flow4 screens
Round Timer4 screens

Verdict

The call

The clearest difference is monetization model: Round Timer at free against Interval Flow's subscription. Round Timer also leads on review sentiment (67% vs 48%) and rating (4.9 vs 4.7). Interval Flow's advantage is ratings volume (168 vs 14). 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

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 and Round Timer sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Round Timer holds the better App Store score, 4.9 against 4.7. That said, the two scores are not equally well evidenced: Interval Flow has 168 ratings behind it against 14, so its average is the more settled of the two. Written reviews point the same way: 48% of Interval Flow's written reviews are positive against 67% of Round Timer's.

UpkeepUpdate frequency

Interval Flow ships an update fortnightly, Round Timer every 2 weeks. The most recent releases landed on September 5, 2026 and August 23, 2026 respectively.

Scorecard5 real differences · 5 level
Interval Flow versus Round Timer: the parameters behind the verdict, then further details
ParameterInterval FlowRound Timer
PriceFreeFree
Rating4.7 (168 ratings)4.9 (14 ratings) — better
Positive reviews48.1% of reviews66.7% of reviews — better
Number of ratings168 — better14
Update frequencyFortnightly — betterEvery 2 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationSubscriptionFree — better
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS18.615.0 — better
Further details — not scored
Size20 MB18 MB
Age rating4+4+
DeveloperBence KaposztaYauhen Bahdanovich

Customer experience

Interval Flow

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

Round Timer

All ratings14 ratings
Positive92.9%
Neutral7.1%
Negative0.0%
Written reviews3 reviews
Positive66.7%
Neutral33.3%
Negative0.0%

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
1 purchases

Round Timer

One-time1
  • Round Pro$0.99

Questions

Is Interval Flow free?
Interval Flow is free to download, with in-app purchases available.
Is Round Timer free?
Round Timer is free to download, with in-app purchases available.
Which has better reviews, Interval Flow or Round Timer?
Round Timer is rated higher. Interval Flow averages 4.7 out of 5 from 168 ratings, while Round Timer averages 4.9 from 14 ratings.
Do Interval Flow or Round Timer have ads?
Neither Interval Flow nor Round Timer shows ads.
Which is updated more often, Interval Flow or Round Timer?
Interval Flow ships an update fortnightly, and Round Timer every 2 weeks. Most recently, Interval Flow was updated on September 5, 2026 and Round Timer on August 23, 2026.

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