Comparison

Interval Flow vs Personal Trainer AI

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

Personal Trainer AI

This app uses AI-powered form analysis and real-time feedback to guide your workouts. It creates personalized plans for various fitness goals and tracks your progress, offering a comprehensive fitness experience.

Highlights
  • AI-powered form analysis
  • Personalized workout plans
  • Real-time voice feedback
  • Progress tracking
  • Pre-made video workouts
  • Warm-up and cool-down routines
Features
Read full description

Welcome to the future of fitness, where cutting-edge technology meets personalized guidance to help you reach your goals. FormFusion is more than just an exercise app; it's your intelligent training partner, equipped with AI-powered form analysis, custom workouts, and real-time feedback to keep you motivated and injury-free. Find the perfect plan for your goals, from weight loss to muscle building. Move with Confidence, Train with Precision: •AI-powered form analysis: Ditch the guesswork! FormFusion's advanced AI analyzes your movements through your phone's camera, providing instant feedback on your technique. Whether you're a seasoned gym-goer or just starting, FormFusion ensures you perform each exercise correctly, maximizing your workout's effectiveness while minimizing the risk of injury. • Personalized workouts tailored to you: No more one-size-fits-all routines! FormFusion takes your fitness level, goals, and preferences to create custom workout plans that challenge and keep you engaged. From strength training and cardio to HIIT and yoga, find the perfect workout to fit your lifestyle and preferences. • Real-time voice feedback: Get coached in real-time! FormFusion's voice guidance system provides clear instructions and encouragement throughout your workout, keeping you on track and motivated. Not required to check your phone constantly; let FormFusion be your virtual trainer, guiding you to perfect form and peak performance. • Track your progress and celebrate your wins: Stay motivated and witness your progress with detailed workout logs and performance tracking. FormFusion keeps tabs on your reps, sets, weight lifted, and calories burned so you can see how far you've come and celebrate every milestone. • Pre-Made Video Workouts: Immerse yourself in expert-led workouts where a virtual fitness instructor demonstrates each exercise. Follow along effortlessly, and let FormFusion keep you synchronized for a comprehensive and engaging workout experience. FormFusion is a revolutionary app that uses AI to give you real-time feedback on your form, like having a personal trainer in your pocket. Beyond the Basics: A Fitness Ecosystem for All FormFusion isn't just about the workout itself; it's about creating a holistic fitness experience that supports your journey every step. Here's what else you can expect: •Warm-up and cool-down routines: Get your body prepped for action and wind down properly with guided warm-up and cool-down routines designed to prevent injuries and boost recovery. •Home & gym workouts: Whether you prefer working out at home or the gym, FormFusion has you covered. Enjoy a seamless fitness experience wherever you are. •Exercise library and technique guide: Access a comprehensive library of exercises with detailed instructions and video demonstrations to ensure you perform each movement with proper form. •Fully Customize Your App: Beyond Workouts allows you to personalize the app. Exercise your creative control by fully customizing the app's appearance and changing the color palette. Make FormFusion an extension of your identity! •Train anywhere, anytime: Ditch the crowded gym and expensive trainers. Work out on your own terms, with your phone as your ultimate coach. Download FormFusion today and experience the future of fitness. With its cutting-edge AI technology, personalized approach, and comprehensive features, FormFusion is your one-stop shop for achieving your fitness goals, staying injury-free, and loving the journey every step of the way. Remember, with FormFusion, you're not just working out. You are investing in a healthier, happier you. Take the first stage towards your fitness transformation today! Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.starhiveconcept.com/formfusion-privacy-policy-terms/

Screenshots

Interval Flow4 screens
Personal Trainer AI4 screens

Verdict

The call

Interval Flow and Personal Trainer AI both sit at 4.7 stars, but that hides the real split: 94% of Personal Trainer AI's written reviews are positive against 48% of Interval Flow's. Personal Trainer AI also leads on monetization model (free with in-app purchases vs subscription) and update cadence (every 6 days vs fortnightly). On price, rating, ratings volume 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 and Personal Trainer AI sells 4 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.7 for Interval Flow against 4.6 for Personal Trainer AI. Both are backed by a comparable volume of ratings — 168 and 106 respectively. Written reviews are what separate them: 48% of Interval Flow's written reviews are positive against 94% of Personal Trainer AI's.

UpkeepUpdate frequency

Interval Flow ships an update fortnightly, Personal Trainer AI every 6 days. The most recent releases landed on September 5, 2026 and September 16, 2026 respectively.

Scorecard3 real differences · 7 level
Interval Flow versus Personal Trainer AI: the parameters behind the verdict, then further details
ParameterInterval FlowPersonal Trainer AI
PriceFreeFree
Rating4.7 (168 ratings) — better4.6 (106 ratings)
Positive reviews48.1% of reviews94.1% of reviews — better
Number of ratings168 — better106
Update frequencyFortnightlyEvery 6 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationSubscriptionFree with in-app purchases — better
DevicesiPhone, iPad — betteriPhone
Requires iOS18.617.0 — better
Further details — not scored
Size20 MB243 MB
Age rating4+4+
DeveloperBence KaposztaStarhive Concept Srl

Customer experience

Interval Flow

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

Personal Trainer AI

All ratings106 ratings
Positive90.6%
Neutral0.0%
Negative9.4%
Written reviews17 reviews
Positive94.1%
Neutral0.0%
Negative5.9%

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
4 purchases

Personal Trainer AI

Subscriptions3
  • Unlimited access$3.991 Month
  • Unlimited access2 variants$14.996 Months
  • Unlimited access7 Days trial$24.991 Year
One-time1
  • Unlimited Access - Lifetime$59.99

Questions

Is Interval Flow free?
Interval Flow is free to download, with in-app purchases available.
Is Personal Trainer AI free?
Personal Trainer AI is free to download, with in-app purchases available.
Which has better reviews, Interval Flow or Personal Trainer AI?
Interval Flow is rated higher. Interval Flow averages 4.7 out of 5 from 168 ratings, while Personal Trainer AI averages 4.6 from 106 ratings.
Do Interval Flow or Personal Trainer AI have ads?
Neither Interval Flow nor Personal Trainer AI shows ads.
Which is updated more often, Interval Flow or Personal Trainer AI?
Interval Flow ships an update fortnightly, and Personal Trainer AI every 6 days. Most recently, Interval Flow was updated on September 5, 2026 and Personal Trainer AI on September 16, 2026.

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