Comparison

Interval Flow vs Reformd

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

Reformd

This app helps fitness instructors manage their classes with custom workout builders, precise timers, and instruction cues. Share routines with colleagues and monitor progress with live activity integration.

Highlights
  • Custom workout builder
  • Professional timer interface
  • Movement instruction cues
  • Workout sharing
  • Live Activities integration
  • Instructor-focused design
Read full description

Reformd - Professional Fitness Class Management Reformd is the essential tool for fitness instructors who need reliable, professional-grade class management. Designed specifically for instructors teaching structured movement sessions, Reformd streamlines your workflow so you can focus on what matters most - guiding your students. Whether you're teaching Pilates, yoga, strength training, or any movement-based fitness class, Reformd provides the timing precision and organizational tools that professional instructors demand. Key Features: Custom Workout Builder: Create detailed workout sequences with precise timing for each movement. Build your exercise library and reuse movements across multiple classes. Professional Timer Interface: Large, clear countdown displays designed for instructors to see at a glance during classes. Perfect visibility across the studio. Movement Instructions: Add detailed cues and instructions for each exercise. Keep your teaching notes organized and accessible during live instruction. Workout Sharing: Share your carefully crafted workout sequences with other instructors or import routines from colleagues. Live Activities: Monitor workout progress directly from your lock screen with iOS Live Activities and Dynamic Island integration. Instructor-Focused Design: Every feature is built with working fitness professionals in mind. Clean, distraction-free interface that works seamlessly during live classes. Reformd transforms how fitness instructors plan, organize, and execute their classes. Join thousands of instructors who trust Reformd to keep their classes running smoothly and professionally. To see our Terms of Use (EULA), please follow this link: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Interval Flow4 screens
Reformd4 screens

Verdict

The call

Interval Flow and Reformd both sit at 4.7 stars, but that hides the real split: 100% of Reformd's written reviews are positive against 48% of Interval Flow's. Reformd also leads on in-app purchases (none vs 10). Interval Flow's advantage is ratings volume (168 vs 5). On price, rating, update cadence and ads 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. Reformd asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.7 for Interval Flow against 4.8 for Reformd. That said, the two scores are not equally well evidenced: Interval Flow has 168 ratings behind it against 5, so its average is the more settled of the two. Written reviews are what separate them: 48% of Interval Flow's written reviews are positive against 100% of Reformd's.

UpkeepUpdate frequency

Interval Flow ships an update fortnightly, Reformd weekly. The most recent releases landed on September 5, 2026 and September 10, 2026 respectively.

Scorecard4 real differences · 6 level
Interval Flow versus Reformd: the parameters behind the verdict, then further details
ParameterInterval FlowReformd
PriceFreeFree
Rating4.7 (168 ratings)4.8 (5 ratings) — better
Positive reviews48.1% of reviews100.0% of reviews — better
Number of ratings168 — better5
Update frequencyFortnightlyWeekly — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationSubscriptionFree — better
DevicesiPhone, iPad — betteriPhone
Requires iOS18.617.0 — better
Further details — not scored
Size20 MB4 MB
Age rating4+4+
DeveloperBence KaposztaPeter Misthos

Customer experience

Interval Flow

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

Reformd

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
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
None

Reformd

No in-app purchases

Questions

Is Interval Flow free?
Interval Flow is free to download, with in-app purchases available.
Is Reformd free?
Reformd is free to download, with no in-app purchases.
Which has better reviews, Interval Flow or Reformd?
Reformd is rated higher. Interval Flow averages 4.7 out of 5 from 168 ratings, while Reformd averages 4.8 from 5 ratings.
Do Interval Flow or Reformd have ads?
Neither Interval Flow nor Reformd shows ads.
Which is updated more often, Interval Flow or Reformd?
Interval Flow ships an update fortnightly, and Reformd weekly. Most recently, Interval Flow was updated on September 5, 2026 and Reformd on September 10, 2026.

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