Comparison

TimeFit vs Interval Timer for HIIT | Cero

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

Head to head
About

TimeFit

Create custom workout routines for various training methods like HIIT, Tabata, and Crossfit. This app offers interval timers, voice alerts, and a smart stopwatch to enhance your fitness sessions. Track your progress with a workout history log and share routines with others.

Highlights
  • Custom interval timer
  • HIIT and Tabata support
  • Voice alerts for exercises
  • Smart stopwatch with lap tracking
  • Workout history and notes
  • Workout sharing
  • Organized workout folders
Features
Read full description

Create your workouts quickly and easily, whatever training methods you use Crossfit, HIIT, Tabata, TRX etc. *** A single watchword SIMPLICITY *** TimeFit app is an intelligent Tabata Timer with a custom interval timer. This advanced interval timer adds craziness to your fitness training and workouts. An enhanced timer with interval alerts make your training activity more interesting. TimeFit - Workout timer is your gym boss to track all your exercise activities. HIIT interval training timer makes it easy for you to calculate workouts routine. ### THE FEATURES OF TIMEFIT ### Smart Stopwatch - A smart stopwatch is integrated into the TimeFit app. It shows you the fastest and slowest lap live. Adaptive Circuit Training - A very easy to use editor with which you can create the circuit training adaptive to your sport. Interval Timer - Plan your workouts in advance using interval trainers. When the days come, they will be displayed on the home screen of the TimeFit. Seconds timer and minute timer are ready with interval alerts. TimeFit - Workout Timer IS THE ONLY ONE TO DO IT. Workout History - Logbook lets you keep track of your training history. Add workout photos and training notes to your routine. Voice Alerts - TimeFit will tell you the next exercise using enhanced timer and interval alerts. No need to look at the screen. The voice synthesis and the beeps are fully customizable. Personalized - Creates folders to organize your workouts. Easy Share - Exchange your workouts with your friends or with a sports coach. Eye Comfort - Large display is coloured for the comfort of the eyes even from a distance. An infinite number of colors are available. But as a practice is better than a long speech, I invite you to try it :) ^^^ IMPORTANT ^^^ - Notifications are only used to show current or upcoming workout when the application is in the background. - TimeFit will ask you for permission to access data from the Health application. TimeFit - Workout Timer uses information on weight, number of steps and distance travelled for enhanced user experience. ### WE NEED YOU ### - A great feature you would like to see integrated into the application? - An idea for improvement? - A nasty bug that's ruining your life? -- CONTACT US NOW -- more importantly -- WRITE A REVIEW -- it helps us a lot... Thank you all in advance and don't forget: $$$ SWEAT TODAY, SMILE TOMORROW! $$$ Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Interval Timer for HIIT | Cero

This interval timer app enhances various workouts like HIIT, Tabata, and yoga with intuitive design and customizable timer modes. Create and save custom intervals, track calorie expenditure, and sync settings across devices, including Apple Watch.

Highlights
  • Customizable interval timers
  • Simple and advanced timer modes
  • Create and save multiple workout settings
  • Apple Watch compatibility with heart monitor
  • Automatic calorie tracking to Apple Health
  • Cross-device sync
Features
Read full description

Build an interval workout around the way you train. Cero is a flexible interval timer for HIIT, Tabata, circuit training, WODs and HYROX preparation. Set up a quick work/rest timer or program each interval in detail. Distinct colors, large controls and reliable cues keep you focused on the session instead of the clock. BUILD YOUR SESSION • Set work, recovery, sets, warm-up and cool-down. • Create advanced workouts with custom intervals, colors, icons and intensity levels. • Save, duplicate and reorder timers. • Share timers by file or QR code. • Review completed sessions in workout history. STAY IN THE WORKOUT • Follow compatible sessions with Live Activities and Dynamic Island. • Start saved or recent timers from Home Screen widgets. • Use Siri and Shortcuts to start, pause, resume and stop a timer. • Put Gym Display on a larger screen or mirrored TV. • Choose a default song or assign music to individual intervals. • Customize sounds, voice cues, vibrations and background alerts. TRAIN BY HEART RATE Adaptive HR can extend recovery until you reach your target heart rate, then guide hard efforts with low and high alerts. Pair a Bluetooth heart-rate monitor with iPhone or train with heart-rate data from Apple Watch. COUNTDOWN AND STOPWATCH The built-in countdown and lap stopwatch cover warm-ups, station changes, rest periods and race-day practice. Stopwatch sessions continue after you close and reopen the app. ON APPLE WATCH Run saved workouts from your wrist, follow heart rate and use the standalone countdown and stopwatch. Cero can save completed workouts and estimated calories to Apple Health. Automatic iCloud backups help protect saved timers and custom intervals. Useful for HIIT, Tabata, circuits, EMOM-style workouts, boxing rounds, strength and conditioning, indoor cycling, running intervals and hybrid race preparation. Feedback and suggestions: hi@flawless.studio Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

TimeFit4 screens
Interval Timer for HIIT | Cero4 screens

Verdict

The call

The clearest difference is update cadence: Interval Timer for HIIT | Cero at every 3 days against TimeFit's fortnightly. Interval Timer for HIIT | Cero also leads on iOS requirement (16.0 vs 18.0). On price, rating, review sentiment and ratings volume 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. TimeFit sells 3 in-app purchases, starting at $3.99 per month and Interval Timer for HIIT | Cero sells 2 in-app purchases, starting at $2.99 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 — 4.7 for TimeFit against 4.7 for Interval Timer for HIIT | Cero. Both are backed by a comparable volume of ratings — 321 and 438 respectively. Written reviews split almost evenly too, at 75% and 75% positive.

UpkeepUpdate frequency

TimeFit ships an update fortnightly, Interval Timer for HIIT | Cero every 3 days. Both last shipped on November 2, 2026.

Scorecard2 real differences · 8 level
TimeFit versus Interval Timer for HIIT | Cero: the parameters behind the verdict, then further details
ParameterTimeFitInterval Timer for HIIT | Cero
PriceFreeFree
Rating4.7 (321 ratings)4.7 (438 ratings) — better
Positive reviews74.8% of reviews — better74.6% of reviews
Number of ratings321438 — better
Update frequencyFortnightlyEvery 3 days — better
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, Apple WatchiPhone, iPad, Apple Watch — better
Requires iOS18.016.0 — better
Further details — not scored
Size55 MB45 MB
Age rating4+4+
DeveloperSamir MestariFlawless Studio LLC

Customer experience

TimeFit

All ratings321 ratings
Positive91.9%
Neutral3.4%
Negative4.7%
Written reviews103 reviews
Positive74.8%
Neutral7.8%
Negative17.5%

Interval Timer for HIIT | Cero

All ratings437 ratings
Positive92.9%
Neutral3.9%
Negative3.2%
Written reviews59 reviews
Positive74.6%
Neutral10.2%
Negative15.3%

User reviews

TimeFit

From 321 App Store ratings

What we love

  • 👍 Easy to use and configure
  • 💪 Highly customizable workouts
  • 🎵 Works with music in background
  • 🗣️ Voice prompts for next exercise
  • 💰 Good value for money (paid version)

Room to improve

  • 💸 Expensive for full features
  • quảng cáo Frequent and intrusive ads
  • 🐛 Crashes frequently
  • 🔒 Paywall for essential features
  • 🗑️ Free version limited

Interval Timer for HIIT | Cero

From 438 App Store ratings

What we love

  • 👍 Simple and straightforward
  • 👍 Very practical and customizable
  • 👍 Great for HIIT and Tabata
  • 👍 Clear design and easy to use
  • 👍 Good value, no subscription

Room to improve

  • 🔋 Drains battery
  • 🎶 Music playback interrupted
  • ⚠️ Ads interrupt timers
  • 🔊 Weak or non-functional sound/haptics
  • 🔄 Forced updates

Bugs and requests

TimeFit

Reported bugs

20 issues
  • Lost all data after update
  • Crashes every time on opening
  • Freezes on introductory pop-up
  • Crashes randomly with voice alert language change
  • Free version doesn't play timer
Show 15 more
  • Obnoxious full-screen ads
  • App crashes when trying to copy/paste workouts
  • Copy/paste only copies folder, not exercises
  • Exercises missing names in preview
  • Timer not correct when using other apps simultaneously
  • Timer stops when app is in background
  • Timer hasn't been running when checked
  • Interval timer only runs when screen is on
  • Unable to contact developer
  • Weight log only in kg
  • Voice is too quiet
  • Unable to restore purchase
  • Text box moves out of screen when editing
  • App crashes at 4 seconds before end of interval
  • Randomly stops workouts part way through

Requested features

14 requests
  • Apple Watch compatibility
  • iPad adaptation
  • Visual statistics/graphs
  • Independent voice volume control
  • Ability to share workouts
Show 9 more
  • Display photo with intervals
  • Sync with Apple Watch
  • Add daily photo
  • Receive notifications for daily workouts
  • Image or video of exercise
  • Turn on/off individual alert sounds
  • Fix text box positioning when naming steps
  • Add statistics table for overview
  • Restore purchase on new phone

Interval Timer for HIIT | Cero

Reported bugs

4 issues
  • App runs in background draining battery
  • Rotation broke after update
  • Apple workout app overrides Cero app on Apple Watch
  • Interval signals too weak or not working

Requested features

5 requests
  • Ability to group timers
  • Option to add warm-up and cool-down features
  • Ability to type numbers for time adjustment
  • Timer sounds through headphones or interrupting music
  • Ability to change exercise names

In-app purchases

3 purchases

TimeFit

Subscriptions2
  • Monthly7 Days trial$3.991 Month
  • Yearly (Recommended)14 Days trial$17.991 Year
One-time1
  • Upgrade to Pro$8.99
2 purchases

Interval Timer for HIIT | Cero

Subscriptions1
  • Cero Pro Monthly7 Days trial$2.991 Month
One-time1
  • Cero Pro$14.99

Questions

Is TimeFit free?
TimeFit is free to download, with in-app purchases available.
Is Interval Timer for HIIT | Cero free?
Interval Timer for HIIT | Cero is free to download, with in-app purchases available.
Which has better reviews, TimeFit or Interval Timer for HIIT | Cero?
Interval Timer for HIIT | Cero is rated higher. TimeFit averages 4.7 out of 5 from 321 ratings, while Interval Timer for HIIT | Cero averages 4.7 from 438 ratings.
Do TimeFit or Interval Timer for HIIT | Cero have ads?
Both TimeFit and Interval Timer for HIIT | Cero show ads.
Which is updated more often, TimeFit or Interval Timer for HIIT | Cero?
TimeFit ships an update fortnightly, and Interval Timer for HIIT | Cero every 3 days. Most recently, TimeFit was updated on November 2, 2026 and Interval Timer for HIIT | Cero on November 2, 2026.

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