Comparison

Interval Timer □ HIIT Timer vs Flextimer

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

Head to head
About

Interval Timer □ HIIT Timer

Easily create custom workout timers with adjustable intervals for exercise and rest. Enjoy audio cues and track your progress with detailed history. Integrates with your music apps and allows background use.

Highlights
  • Customizable intervals for workout and rest
  • Voice or beep audio guides
  • Background operation with music apps
  • Detailed workout history and statistics
  • Repeat previous workouts
  • Optional subscription for advanced features
Features
Read full description

A simple and beautiful interval timer. 1. Drag to set your custom intervals for workout, rest, rounds, etc 2. Tap to start. Interval Timer doesn't interfere with your music or other apps: ∙ Listen to your music apps while you work out. ∙ Voice or beep guides for every workout. ∙ You can leave the app and still listen to the audio guides, in order to follow a workout you found online. And no need to manually record your workouts: ∙ Detailed history and statistics pages to track your progress. ∙ Repeat a previous workout from your history, so you don't need to set it again. If you have any ideas for how to improve the app, just tap "Contact Support" inside the app and let us know! We are always trying to improve Interval Timer. This app offers an optional auto-renewable subscription, Premium Pass (monthly), and a one-time Lifetime Pass. Premium Pass starts with a 1-week free trial for eligible new subscribers, then renews automatically every month at the price shown in the app until you cancel. Payment is charged to your Apple Account when you confirm the purchase or, with a free trial, when the trial ends. The subscription renews automatically unless auto-renew is turned off at least 24 hours before the end of the current period, and your account is charged for the renewal within 24 hours before the end of the current period. You can manage the subscription and turn off auto-renewal at any time in your Apple Account settings. Cancelling stops the next renewal, and Premium stays active until the end of the period you've paid for. Any unused part of a free trial ends when you buy a subscription. Privacy Policy: https://float.support/interval-timer/privacy Terms of Use: https://float.support/interval-timer/terms

About

Flextimer

Create custom interval timers for workouts, focus sessions, or daily routines. Design sessions step-by-step or use AI to generate them from plain text descriptions. Includes cues for sounds, vibration, and color changes.

Highlights
  • AI-generated timer creation from text
  • Customizable interval and round timers
  • Step cues for sound, vibration, and color
  • Timer Summary with detailed progress
  • Configurable run-screen controls
  • Saved custom timers and starting points
Features
Read full description

More than a countdown. Flextimer is a flexible interval, round, and HIIT timer for workouts, focus, routines, and more — built your way. Design a session step by step, or just describe it in plain words and let AI create it for you to review, edit, and save. Describe. Cue. Run. What sets Flextimer apart is the combination: named steps and repeating rounds, cues for sounds, vibration, color changes, and countdowns, a clear Timer Summary, and AI that can build a timer for you. Fit every part of your session, from prep and work to breaks and cooldowns. Use Flextimer for: • Workouts and interval training (HIIT, EMOM, Tabata) • Boxing, MMA, and round timers • Pomodoro and focus sessions • Meditation and breathing exercises • Presentation and speaking practice • Stretch breaks, chores, cooking, and daily routines • Structured sessions that need more than one countdown Features: • Describe a timer in plain words and let AI build it for you (preview) • Flexible step and repeat-group timer design • Optional final-step skipping, useful for omitting final rest periods • Step cues for additional sounds, vibration, color transitions, countdowns, or in repeating intervals • Timer Summary with total time, time by color, cues, and progress behavior • Configurable run-screen controls for next step, total remaining time, skip, and restart • Custom progress tracking for steps or rounds • Saved custom timers and built-in starting points • Local-first storage • No account required • No ads Flextimer is built for anyone who needs more than a simple countdown timer.

Screenshots

Interval Timer □ HIIT Timer4 screens
Flextimer4 screens

Verdict

The call

Interval Timer □ HIIT Timer and Flextimer both sit at 4.8 stars, but that hides the real split: 100% of Flextimer's written reviews are positive against 61% of Interval Timer □ HIIT Timer's. Flextimer also leads on in-app purchases (none vs 5) and update cadence (every 9 days vs every 5 weeks). Interval Timer □ HIIT Timer's advantage is ratings volume (88K vs 2). On price, rating, ads 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 □ HIIT Timer sells 5 in-app purchases, starting at $1.99 per month. Flextimer asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Flextimer holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Interval Timer □ HIIT Timer has 88K ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 61% of Interval Timer □ HIIT Timer's written reviews are positive against 100% of Flextimer's.

UpkeepUpdate frequency

Interval Timer □ HIIT Timer ships an update every 5 weeks, Flextimer every 9 days. The most recent releases landed on November 8, 2026 and October 31, 2026 respectively.

Scorecard5 real differences · 5 level
Interval Timer □ HIIT Timer versus Flextimer: the parameters behind the verdict, then further details
ParameterInterval Timer □ HIIT TimerFlextimer
PriceFreeFree
Rating4.8 (88K ratings)5.0 (2 ratings) — better
Positive reviews60.6% of reviews100.0% of reviews — better
Number of ratings88K — better2
Update frequencyEvery 5 weeksEvery 9 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.615.1 — better
Further details — not scored
Size21 MB56 MB
Age rating4+4+
DeveloperFloat Tech, LLCSOPHOMATH LLC

Customer experience

Interval Timer □ HIIT Timer

All ratings87,497 ratings
Positive96.7%
Neutral1.2%
Negative2.1%
Written reviews1,851 reviews
Positive60.6%
Neutral6.2%
Negative33.2%

Flextimer

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

Bugs and requests

Interval Timer □ HIIT Timer

Reported bugs

3 issues
  • Timer not always accurate
  • Favorites/saved workouts feature not working
  • Inconsistent behavior when pausing/resuming

Requested features

3 requests
  • Ability to save and name custom workouts
  • More flexibility in exercise/rest time settings
  • Option to adjust volume of voice prompts

Flextimer

Not enough reviews yet to summarise bugs or requests.

In-app purchases

5 purchases

Interval Timer □ HIIT Timer

Subscriptions2
  • Premium Pass7 Days trial$1.991 Month
  • Premium Pass7 Days trial$2.991 Month
One-time3
  • Lifetime Pass$14.99
  • Lifetime Pass$19.99
  • Premium Forever Promo$29.99
None

Flextimer

No in-app purchases

Questions

Is Interval Timer □ HIIT Timer free?
Interval Timer □ HIIT Timer is free to download, with in-app purchases available.
Is Flextimer free?
Flextimer is free to download, with no in-app purchases.
Which has better reviews, Interval Timer □ HIIT Timer or Flextimer?
Flextimer is rated higher. Interval Timer □ HIIT Timer averages 4.8 out of 5 from 88K ratings, while Flextimer averages 5.0 from 2 ratings.
Do Interval Timer □ HIIT Timer or Flextimer have ads?
Neither Interval Timer □ HIIT Timer nor Flextimer shows ads.
Which is updated more often, Interval Timer □ HIIT Timer or Flextimer?
Interval Timer □ HIIT Timer ships an update every 5 weeks, and Flextimer every 9 days. Most recently, Interval Timer □ HIIT Timer was updated on November 8, 2026 and Flextimer on October 31, 2026.

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