Comparison

Interval Timer vs Justfit

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 provides a customizable interval timer for various training routines, including HIIT and Tabata. Easily set up custom workouts, track your progress, and stay motivated with visual cues and audio notifications. It's suitable for a wide range of activities from fitness to productivity.

Highlights
  • Customizable workout setup
  • Progress tracking with calendar
  • Saveable custom presets
  • Color-coded notifications
  • Listen to music/audiobooks
  • Large, full-screen display
  • Widget for easy access
Features
Read full description

Interval Timer: Tabata and HIIT is a customizable timer for sports. Use it for High-intensity interval training and workout. It's a free sports interval timer app that makes it easy to create your custom training routine. Use it as your timer for training or exercise. This sports timer is great for crossfit, fitness and running. The sports timer will also be useful for various activities such as crossfit, jogging, boxing,circuit training,breathing exercises and yoga. You can use this circuit timer as a productivity timer to focus on your work tasks. Key features: Setup workout Tracking your progress Customizable presets Notifications & colors Motivation Listening music or books Huge digits Widget SETUP WORKOUT Set up, edit and save your own workouts with the customizable feature. Add as many intervals as you like. You can add a 10 second rest period and a 20 second work period, as well as a 5 second interval between exercises. TRACKING PROGRESS Track your workouts with a Calendar. Plan and track events, and get notified when you have a training scheduled. With this feature, you will not miss a single workout and will keep track of your progress. CUSTOMIZABLE PRESETS Save your workouts in the presets section. It's also possible to create your own custom intervals. You can add an unlimited number of presets. NOTIFICATIONS & COLORS Each training phase is easy to distinguish by a different color and is initiated by an individually adjustable signal (sound, vibration, voice) MOTIVATION Each completed exercise motivates you to achieve higher goals. Enjoy your training and achieve your fitness goals with the interval timer. LISTENING MUSIC Listen to motivational audiobooks or your favorite music and get inspired and energized. Full screen color coded display is easy to read from a distance. Widget helps you train without being distracted by the constant unlocking of your phone. Interval Timer: Tabata and HIIT is an easy to use sports workout timer for your daily fitness training at home, at the gym or everywhere else.

About

Justfit

This app provides customizable interval timers for various activities like HIIT, Tabata, meditation, and studying. Track your progress with detailed history and analytics, and personalize your experience with custom sounds and colors.

Highlights
  • Fully customizable interval timers
  • Full-screen circular countdown/countup stopwatch
  • Pre-made templates for HIIT, Tabata, Meditation
  • Customizable audio for intervals, sets, and rest
  • Detailed progress tracking and analytics
  • Timer sharing via export/import
  • Multilanguage support
Features
Read full description

Justfit is the interval timer that stays out of your way. Build a circuit, Tabata, HIIT or boxing timer in seconds and let it run in the background with big, readable digits. WHAT YOU GET • Unlimited intervals, sets and rest — name and color each one • Voice announcements and 3-2-1 countdown, so you never look at the screen • Sounds that cut through your music, then get out of the way • Apple Watch app and complication, Live Activity on the Lock Screen • History, streaks and weekly insights • Widgets and Siri: "Start Tabata in Justfit" FREE VS PRO Free: 3 timers, all basic sounds, 7-day history. Pro unlocks unlimited timers, templates, premium sounds and full insights — monthly, yearly or one-time. PRIVACY No account, no tracking. Your timers stay on your device and, if you choose, in your iCloud. Terms of Use (EULA): https://www.nahitfidanci.com/justfit/terms Privacy Policy: https://www.nahitfidanci.com/justfit/privacy

Screenshots

Interval Timer4 screens
Justfit4 screens

Verdict

The call

The clearest difference is ads: Justfit at none against Interval Timer's shown. Justfit also leads on update cadence (every 3 days vs monthly). Interval Timer's advantage is ratings volume (379 vs 1). On price, rating, review sentiment 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 Timer sells 12 in-app purchases, starting at $2.09 per month and Justfit sells 4 in-app purchases, starting at $1.99 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 — 4.9 for Interval Timer against 5.0 for Justfit. That said, the two scores are not equally well evidenced: Interval Timer has 379 ratings behind it against 1, so its average is the more settled of the two. Written reviews are what separate them: 97% of Interval Timer's written reviews are positive against 100% of Justfit's.

UpkeepUpdate frequency

Interval Timer ships an update monthly, Justfit every 3 days. The most recent releases landed on October 1, 2026 and October 3, 2026 respectively.

Scorecard3 real differences · 7 level
Interval Timer versus Justfit: the parameters behind the verdict, then further details
ParameterInterval TimerJustfit
PriceFreeFree
Rating4.9 (379 ratings)5.0 (1 ratings) — better
Positive reviews96.5% of reviews100.0% of reviews — better
Number of ratings379 — better1
Update frequencyMonthlyEvery 3 days — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
DevicesiPhone, iPad, iPod, Apple Watch — betteriPhone, iPod, Apple Watch
Requires iOS15.015.0
Further details — not scored
Size113 MB104 MB
Age rating4+4+
DeveloperSimpleInnovation LLCFerda Nahit Fidanci

Customer experience

Interval Timer

All ratings379 ratings
Positive99.5%
Neutral0.3%
Negative0.3%
Written reviews317 reviews
Positive96.5%
Neutral0.9%
Negative2.5%

Justfit

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Interval Timer

Reported bugs

2 issues
  • Occasional app crashes
  • Compatibility issues with older devices

Requested features

3 requests
  • More pre-designed workout routines
  • Ability to name and customize exercises
  • Option to adjust countdown time between intervals

Justfit

Not enough reviews yet to summarise bugs or requests.

In-app purchases

12 purchases

Interval Timer

Subscriptions8
  • Timer PRO for 1 month: 30% OFF7 Days trial$2.091 Month
  • Timer PRO for 1 month: 25% OFF7 Days trial$2.291 Month
  • Interval Timer PRO for 1 month$2.991 Month
Show 5 more
  • Interval Timer PRO for 1 month7 Days trial$2.991 Month
  • Interval Timer PRO - 30% OFF7 Days trial$15.001 Year
  • Interval Timer PRO - 25% OFF7 Days trial$16.491 Year
  • Interval Timer PRO for 1 year$21.991 Year
  • Tabata Timer PRO for 1 year7 Days trial$21.991 Year
One-time4
  • Interval Timer - no Ads$2.99
  • HIIT Timer PRO Forever 30% OFF$27.99
  • HIIT Timer PRO Forever 25% OFF$29.99
Show 1 more
  • Exercise Timer PRO Forever$39.99
4 purchases

Justfit

Subscriptions2
  • Monthly$1.991 Month
  • Annual$7.991 Year
One-time2
  • Lifetime Access$3.99
  • Lifetime Access$7.99

Questions

Is Interval Timer free?
Interval Timer is free to download, with in-app purchases available.
Is Justfit free?
Justfit is free to download, with in-app purchases available.
Which has better reviews, Interval Timer or Justfit?
Justfit is rated higher. Interval Timer averages 4.9 out of 5 from 379 ratings, while Justfit averages 5.0 from 1 ratings.
Do Interval Timer or Justfit have ads?
Interval Timer shows ads; Justfit does not.
Which is updated more often, Interval Timer or Justfit?
Interval Timer ships an update monthly, and Justfit every 3 days. Most recently, Interval Timer was updated on October 1, 2026 and Justfit on October 3, 2026.

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