Comparison

Interval Timer vs Group Fitness Class Timer

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

Head to head
About

Interval Timer

This app helps you manage workout intervals with customizable work and rest periods. It runs in the background and allows music playback, with options to save settings and share progress. Integrates with Apple Health for heart rate monitoring.

Highlights
  • Customizable sets, intervals, and rest times
  • Runs in background and with screen locked
  • Music playlist integration
  • Save settings as templates
  • Apple Health integration for heart rate
  • Post workouts to social media
Features
Read full description

***Free and reliable. Perfect for use at home, at the track or in the gym. We’re proud to introduce this handy little app that helps you keep track of your work and rest periods during workouts. Whether your into cycling, running, lifting weights, exercise, workout, stretching, boxing, MMA or HIT, this interval timer will prove to be an invaluable asset to you. Running foreground, background or with device locked, this reliable app allows you specify an overall time as well as program High/Low intensity interval and rest time between sets. Produced by Polycents! Key Features: - Customizable sets, high/low intensity interval and rest for your own need - Retina display, iOS4 and multitasking - Continue to run even when screen is locked - Play your song or playlist during your workout - Post your workout to Facebook or Twitter - Save settings as templates Customizable Features: - Number of Sets - Countdown Time - Set Time - Low Interval time - High Interval time - Rest Time - First Interval (low or high) - Sound Volume - Timer Sounds - Auto Lock - Vibrate - Pause during Rest - Playlist - New Each Set APPLE HEALTH: -Interval Timer can use Apple Health to show heart rate in Apple Watch App. # Subscription Details # - Monthly and annual subscriptions are available. - Payment will be charged to your iTunes account at confirmation of purchase. - Your subscription will automatically renew unless auto-renew is disabled at least 24 hours before the end of the current subscription period. - Automatic renewals will be charged at the same price you were originally charged for the subscription. - Subscriptions can be managed by going to Account Settings on the App Store after purchase. Terms of Use: https://www.iubenda.com/terms-and-conditions/18915396 Privacy Policy: https://www.iubenda.com/privacy-policy/18915396

About

Group Fitness Class Timer

This app helps group fitness instructors plan and lead classes. It combines class structuring, an interval timer, and an exercise library into one tool. Instructors can create custom routines, track time, and even integrate music.

Highlights
  • Class planning and structuring
  • Interval timer with auto-advance
  • Library of 800+ exercises
  • Music integration
  • Apple Watch companion app
  • Custom exercise creation
Features
Read full description

More than a timer. Group Fit Studio is the all-in-one class planner and interval timer built for group fitness instructors. Design how your class flows, fill it with movements from our curated library of 900+ exercises, then press play to teach with your plan and timer working together. Whether you teach HIIT, Tabata, circuits, bootcamp, strength, yoga, Pilates, or barre, Group Fit Studio adapts to your format. Plan, timer, and music live in one app, and the class you build is exactly what the timer runs. GET STARTED IN MINUTES Pick a ready-made starter class and make it yours, or start from a blank page. Rehearse it as a live session before you teach it for real. ONE CLASS, ONE PLACE Each class gets one workspace: timed blocks, group intervals, and station rotations, plus warm-up and cool-down. Set the structure once, then refresh the moves week after week. PRESS PLAY Tap Start and the timer runs your class: work and rest countdowns, auto-advance, and skip forward or back on the fly. Pair an Apple Music playlist and it ducks under the countdown beeps. WEAR IT ON YOUR WRIST Your Apple Watch mirrors the live session, controls it from your wrist, and records the class as a workout in Health. BUILD YOUR LIBRARY 900+ exercises with step-by-step instructions and muscle targeting. Create your own and use them right away, or submit them to the shared catalog. MIX & MATCH WITH COMBOS Studio Combos put several exercises in one slot. Use the community's or build your own. BUILT FOR INSTRUCTORS - Ready-made starter classes to get you teaching in minutes - One workspace per class — structure and this week's exercises side by side - Studio Combos — pre-built or custom exercise groups for any slot - Timed, group, and station-based blocks — HIIT, Tabata, circuits, rounds, and more - Timed blocks with a sequence of moves — each gets its share of the clock, and the live timer calls out what's next - Suggested resistance for every move: Light, Medium, or Heavy, plus what to use, like 15 lb dumbbells or 2 white springs - Live session timer with work/rest countdowns, auto-advance, and interval navigation - Apple Watch companion with on-wrist session controls - Apple Music playlist pairing with auto-ducking countdown beeps - Exercise library with 900+ movements and muscle/equipment filters - Create your own exercises and use them immediately in your classes - Offline support — your classes and sessions work without a connection - Session history to track what you taught and when Designed by a group fitness instructor with 19 years of teaching. Group Fit Studio is free to try. A subscription unlocks unlimited classes. --- Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Interval Timer4 screens
Group Fitness Class Timer4 screens

Verdict

The call

The clearest difference is rating: Group Fitness Class Timer at 5.0 against Interval Timer's 4.5. Group Fitness Class Timer also leads on ads (none vs shown) and update cadence (every 2 days vs every 9 days). Interval Timer's advantage is ratings volume (19K vs 2) and iOS requirement (13.0 vs 26.0). On price, in-app purchases, monetization model 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 Timer sells 6 in-app purchases, starting at $0.99 per month and Group Fitness Class Timer sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Group Fitness Class Timer holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Interval Timer has 19K ratings behind it against 2, so its average is the more settled of the two.

UpkeepUpdate frequency

Interval Timer ships an update every 9 days, Group Fitness Class Timer every 2 days. The most recent releases landed on October 23, 2026 and October 22, 2026 respectively.

Scorecard5 real differences · 5 level
Interval Timer versus Group Fitness Class Timer: the parameters behind the verdict, then further details
ParameterInterval TimerGroup Fitness Class Timer
PriceFreeFree
Rating4.5 (19K ratings)5.0 (2 ratings) — better
Positive reviews72.9% of reviews—
Number of ratings19K — better2
Update frequencyEvery 9 daysEvery 2 days — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod, Apple Watch — betteriPhone, iPad, Apple Watch
Requires iOS13.0 — better26.0
Further details — not scored
Size143 MB39 MB
Age rating4+4+
DeveloperNEO PIXEL LABS PTE. LTD.Paul Krause

Customer experience

Interval Timer

All ratings19,032 ratings
Positive88.4%
Neutral3.3%
Negative8.3%
Written reviews1,597 reviews
Positive72.9%
Neutral5.8%
Negative21.4%

Group Fitness Class Timer

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Interval Timer

Reported bugs

3 issues
  • Ads block functionality
  • App freezes or crashes
  • Timer doesn't work in background

Requested features

5 requests
  • Add notes to workouts
  • Provide workout history and analytics
  • Allow syncing with Apple Health
  • Improve Apple Watch integration
  • Add more customization options

Group Fitness Class Timer

Not enough reviews yet to summarise bugs or requests.

In-app purchases

6 purchases

Interval Timer

Subscriptions6
  • Plus - 1 Month$0.991 Month
  • Premium - 1 Month$1.991 Month
  • Plus - 1 Month$1.991 Month
Show 3 more
  • Premium - 1 Month$2.991 Month
  • Plus - 1 Year2 variants$4.991 Year
  • Premium - 1 Year7 Days trial2 variants$9.991 Year
2 purchases

Group Fitness Class Timer

Subscriptions2
  • Group Fit Studio Monthly$4.991 Month
  • Group Fit Studio Yearly$29.991 Year

Questions

Is Interval Timer free?
Interval Timer is free to download, with in-app purchases available.
Is Group Fitness Class Timer free?
Group Fitness Class Timer is free to download, with in-app purchases available.
Which has better reviews, Interval Timer or Group Fitness Class Timer?
Group Fitness Class Timer is rated higher. Interval Timer averages 4.5 out of 5 from 19K ratings, while Group Fitness Class Timer averages 5.0 from 2 ratings.
Do Interval Timer or Group Fitness Class Timer have ads?
Interval Timer shows ads; Group Fitness Class Timer does not.
Which is updated more often, Interval Timer or Group Fitness Class Timer?
Interval Timer ships an update every 9 days, and Group Fitness Class Timer every 2 days. Most recently, Interval Timer was updated on October 23, 2026 and Group Fitness Class Timer on October 22, 2026.

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