Comparison

Interval Workout 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 Workout Timer

Features
Read full description

Stop fighting your timer. Start building your workout. Block Timer is a premium, modular interval system for those who have outgrown generic fitness apps. Whether you’re an athlete, coach, gym-goer, or home-workout warrior, Block Timer gives you the power to build any routine exactly how you want it. The "Building Block" Advantage Most timers are rigid—ours is flexible. Every exercise and rest period is a "Block" that you can color-code, name, and rearrange with a single swipe. No more "Set/Rest" constraints. Build complex circuits in seconds. Core Features: • Quick Timer: Set and go for simple sessions. • Drag & Drop Builder: The most intuitive routine editor on the App Store. • Smart Voice & Haptics: Audio cues read your exercise names aloud so you can stay focused. • Instant Flexibility: Tap the +15s button mid-workout to extend any block without pausing. • 100% Offline & Private: Your data stays on your device. • Seamless Audio: Play music or podcasts without volume ducking or interruptions. • Pro Stats: Track your total volume, activity days, and workout history. Why Athletes Choose Block Timer: "Finally, a timer that respects my routine. I can build specific mobility flows and high-intensity circuits without fighting a cluttered UI." Subscription Terms: Payment will be charged to your Apple ID account at the confirmation of purchase. The subscription automatically renews unless it is canceled at least 24 hours before the end of the current period. You can manage and cancel your subscriptions by going to your account settings on the App Store after purchase. Privacy Policy: https://persistent-carnation-002.notion.site/Terms-of-Service-32df21bea4988071be83d45234ba8b78?pvs=74 Terms of Service: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

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. Most instructors juggle three tools: notes or a spreadsheet to plan, a separate interval timer to run the clock, and music on the side. Group Fit Studio is all three. The class you build is exactly what the timer runs. No writing on the mirrors, no glancing between apps mid-class. GET STARTED IN MINUTES New to Group Fit Studio? Pick a ready-made starter class and it's yours to customize. Fill in your own exercises, then rehearse it as a live session with a quick guided walkthrough before you teach it for real. Prefer a blank page? Skip straight to building your own class instead. ONE CLASS, ONE PLACE Every class you teach lives on the Classes home. Open one and you get its whole workspace: class setup for the structure with timed blocks, group intervals, and station rotations, plus optional warm-up and cool-down. Set the structure once and prepare it again week after week with fresh movements. Add exercises from a curated library of over 900, organized by muscle group and equipment. Set timing per interval and add instructor notes for cues and transitions. All you have to do is add your exercises and press play. PRESS PLAY Tap Start on any class to run it as your real-time guide. A countdown timer tracks each work and rest interval, auto-advances through your class, and lets you skip forward or back on the fly. Pair an Apple Music playlist with any class so your music starts when class starts and ducks during the countdown beeps. No more losing your place mid-class. WEAR IT ON YOUR WRIST The Apple Watch companion mirrors your live session with the current exercise, timer, and progress at a glance. Use the app controls to pause, resume, skip, or end without picking up your phone. Heart rate and active energy are recorded as a workout in the Health app. BUILD YOUR LIBRARY Browse 900+ exercises, each with step-by-step instructions, primary and secondary muscle targeting, and suggested similar moves to keep your classes fresh. Create your own exercises and use them right away. Submit them to the shared catalog and they may be made available to all instructors after review. MIX & MATCH WITH COMBOS Studio Combos - Browse existing combos or create your own combination of exercises that drop right into an exercise slot in your class. Combos are created by the Group Fit Studio community. Search and filter by muscle group and equipment to find the perfect combo easily. 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 - 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 Workout Timer4 screens
Group Fitness Class Timer4 screens

Verdict

The call

The clearest difference is iOS requirement: Interval Workout Timer at 15.1 against Group Fitness Class Timer's 26.0. 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 Workout Timer sells 3 in-app purchases, starting at $2.49 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.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 3 days. The most recent releases landed on September 20, 2026 and September 18, 2026 respectively.

Scorecard1 real difference · 8 level
Interval Workout Timer versus Group Fitness Class Timer: the parameters behind the verdict, then further details
ParameterInterval Workout TimerGroup Fitness Class Timer
PriceFreeFree
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyEvery 3 daysEvery 3 days
AdsNoNo
In-app purchasesYesYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, Apple Watch
Requires iOS15.1 — better26.0
Further details — not scored
Size50 MB29 MB
Age rating4+4+
DeveloperYU HUA CHEOKPaul Krause

In-app purchases

3 purchases

Interval Workout Timer

Subscriptions2
  • Block Timer Pro$2.491 Month
  • Block Timer Pro7 Days trial$11.991 Year
One-time1
  • Lifetime Premium$31.99
2 purchases

Group Fitness Class Timer

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

Questions

Is Interval Workout Timer free?
Interval Workout 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.
Do Interval Workout Timer or Group Fitness Class Timer have ads?
Neither Interval Workout Timer nor Group Fitness Class Timer shows ads.
Which is updated more often, Interval Workout Timer or Group Fitness Class Timer?
Interval Workout Timer ships an update every 3 days, and Group Fitness Class Timer every 3 days. Most recently, Interval Workout Timer was updated on September 20, 2026 and Group Fitness Class Timer on September 18, 2026.

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