Comparison

PT 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

PT Timer

This app helps you manage physical therapy routines by timing exercises, counting reps, and storing custom instructions. Focus on your form while the app guides you through your prescribed regimen.

Highlights
  • Custom exercise creation with instructions and photos
  • Precise timer and rep counting
  • Voice and tone cues
  • Exercise scheduling and reminders
  • Note-taking and PDF export
  • Apple Health integration
Read full description

Prepare! — Start! — Release! — Repeat! — Switch! • ”I tried quite a few and this is the best one hands down!" • ”I might actually DO the exercises my PT prescribed, thanks to this app!" • ”I've looked at many timers for stretches, floor exercises, weight lifting... and this is the perfect one!" TIMER AND COUNTER FOR PHYSICAL THERAPY Keeps time, counts reps and sets, and lets you focus on your exercise, or something else—not the clock. YOU ENTER YOUR OWN EXERCISES Add instructions and photos, or a weblink, and set up your entire routine, exactly as prescribed by your therapist. Fine-tune cues and timers to match your personal pace. Note: this app does NOT offer pre-defined exercises (other than a few examples). KEY BENEFITS *** Some features are available only during the free trial or with a paid subscription as described below. • Stop counting seconds and reps—focus on proper form, breathing, or even reading or listening to music. • Clear voice and tone cues that work alongside music, podcasts, or when the app runs in the background. • Store all exercise instructions: notes, photos, and web links, with spoken guidance in a voice you choose. • Precisely adjust timers to fit your needs. • Schedule exercises and receive reminders. • Take notes after each exercise and email reports directly to your physical therapist. • Export workouts to PDF, including instructions, photos, and schedules. • Apple Health integration records exercise type and duration. MORE FROM THE REVIEWS • "The app is very easy to use and has resulted in the quality of my exercises increasing markedly … it does meet my needs to a "T"!" • "Best one ever. Have tried 2 others. At 65 stretching is important and this app helps." • "…it lets you focus on other things if you have simple boring exercises." BASIC VERSUS PAID SUBSCRIPTION CAPABILITIES Without a subscription, PT Timer provides limited basic functionality. During a free trial or an active subscription, you can create new exercises with instructions, timers, schedules and more. After the free trial, without a subscription, functionality for those exercises becomes limited. • In basic (unpaid) mode you can: view exercise routines created during a trial or subscription; view instructions and photos; receive already scheduled alerts; check off completed exercises; add and view notes after completing exercises; export to PDF. • Subscription-only features include: timing and counting; creating and editing exercises and workouts; modifying schedules; technical support. • NOTE: This app does not provide exercises or instructions (other than a few examples). You must enter exercises tailored to your own needs. TERMS OF SUBSCRIPTIONS Several subscription options are available with different renewal periods. They all provide access to the full functionality of the app. The prices of subscriptions vary by country and are shown within the app. Payment will be charged to the Apple Account at confirmation of purchase. A subscription automatically renews unless the subscription is cancelled at least 24-hours before the end of the current period. The Apple Account will be charged within 24-hours prior to the end of the current period at the price specified for current subscription. Subscriptions may be managed by the user and cancelled by going to the user's Account Settings after purchase. Any unused portion of a free trial period will be forfeited when the user purchases a subscription. Privacy Policy: http://www.pttimer.com/privacy.pdf Terms of Use: http://www.pttimer.com/TermsOfUse.pdf

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

PT Timer4 screens
Interval Flow4 screens

Verdict

The call

The clearest difference is monetization model: PT Timer at free with in-app purchases against Interval Flow's subscription. PT Timer also leads on review sentiment (81% vs 48%) and iOS requirement (15.6 vs 18.6). Interval Flow's advantage is rating (4.7 vs 4.3) and update cadence (fortnightly vs every 5 weeks). On price, ratings volume, 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. PT Timer sells 3 in-app purchases, starting at $0.99 per month and Interval Flow sells 10 in-app purchases, starting at $4.99 per 3 months. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Interval Flow holds the better App Store score, 4.7 against 4.3. Both are backed by a comparable volume of ratings — 95 and 168 respectively. Written reviews complicate that: 81% of PT Timer's written reviews are positive against 48% of Interval Flow's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

PT Timer ships an update every 5 weeks, Interval Flow fortnightly. The most recent releases landed on August 11, 2026 and September 5, 2026 respectively.

Scorecard5 real differences · 5 level
PT Timer versus Interval Flow: the parameters behind the verdict, then further details
ParameterPT TimerInterval Flow
PriceFreeFree
Rating4.3 (95 ratings)4.7 (168 ratings) — better
Positive reviews81.2% of reviews — better48.1% of reviews
Number of ratings95168 — better
Update frequencyEvery 5 weeksFortnightly — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases — betterSubscription
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.6 — better18.6
Further details — not scored
Size52 MB20 MB
Age rating4+4+
DeveloperQi Analytics LLCBence Kaposzta

Customer experience

PT Timer

All ratings95 ratings
Positive82.1%
Neutral2.1%
Negative15.8%
Written reviews85 reviews
Positive81.2%
Neutral1.2%
Negative17.6%

Interval Flow

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

Bugs and requests

PT Timer

Reported bugs

12 issues
  • App crashes frequently
  • Photo upload fails and hangs app
  • Audio playback errors
  • Countdown timer jumps to end
  • Camera function not working
Show 7 more
  • Audio recording function not working
  • Audio cues not reliably playing
  • App aborts when adding additional photo
  • Photo gets chopped off
  • Unable to delete photos
  • Sound goes off when screen is touched
  • New version audio cues unreliable

Requested features

13 requests
  • Export and import CSV files
  • Sync exercises between devices
  • Add photos from photo library
  • Video support
  • Share exercises and workouts with others
Show 8 more
  • Landscape mode for tablets
  • Dark mode
  • More professional UI
  • Easier upload from lite to standard version
  • Universal app name
  • Ability to create 'uber-exercises' with variants
  • Stronger reporting features
  • Apple Watch integration

Interval Flow

Not enough reviews yet to summarise bugs or requests.

In-app purchases

3 purchases

PT Timer

Subscriptions3
  • Full functionality7 Days trial$0.991 Month
  • Full functionality7 Days trial$1.993 Months
  • Full functionality7 Days trial$4.491 Year
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 PT Timer free?
PT Timer is free to download, with in-app purchases available.
Is Interval Flow free?
Interval Flow is free to download, with in-app purchases available.
Which has better reviews, PT Timer or Interval Flow?
Interval Flow is rated higher. PT Timer averages 4.3 out of 5 from 95 ratings, while Interval Flow averages 4.7 from 168 ratings.
Do PT Timer or Interval Flow have ads?
Neither PT Timer nor Interval Flow shows ads.
Which is updated more often, PT Timer or Interval Flow?
PT Timer ships an update every 5 weeks, and Interval Flow fortnightly. Most recently, PT Timer was updated on August 11, 2026 and Interval Flow on September 5, 2026.

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