Comparison

HIIT timer chronometer gym vs HIIT Interval Timer | Cero

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

Head to head
About

HIIT timer chronometer gym

This interval timer helps you manage work and rest periods for various fitness activities like HIIT, tabata, and strength training. It offers customizable settings for timers, repetitions, and series, with audible and visual cues to guide your workouts.

Highlights
  • Programmable timers
  • Customizable time settings
  • Customizable series and repetitions
  • Audible and visual alerts
  • Pause and resume functionality
  • Speaking coach
Features
Read full description

We’re proud to introduce this handy interval timer that helps you keep track of your work and rest periods during your HIIT interval training and workouts. This app is an awesome training timer, whether you're working on cycling, running, lifting weights, exercise, workout, stretching, boxing, MMA or HIIT, this interval timer will prove to be an invaluable asset for your HIIT interval training. This app can be used as HIIT timer, tabata timer, round timer, and anything else about interval training you want to track. Tabata timer is a full featured, easy to use Tabata timer Crossfit HIIT Interval training, kettle bells, running, cycling, or any interval fitness training. FEATURES: * 3 programmable timers * Customize all time settings * Customize number of series * Customize number of repetitions * easy to hear alerts * pause and resume session * restart session where you left off if interrupted * mute sound use in silent mode * screen changecolor for visual cue * Speaking coach

About

HIIT Interval Timer | 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

HIIT timer chronometer gym4 screens
HIIT Interval Timer | Cero4 screens

Verdict

The call

The clearest difference is in-app purchases: HIIT timer chronometer gym at none against HIIT Interval Timer | Cero's 2. HIIT timer chronometer gym also leads on iOS requirement (14.0 vs 16.0). HIIT Interval Timer | Cero's advantage is update cadence (every 3 days vs every 7 months) and review sentiment (75% vs 53%). On price, 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. HIIT Interval Timer | Cero sells 2 in-app purchases, starting at $2.99 per month. HIIT timer chronometer gym asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

HIIT Interval Timer | Cero holds the better App Store score, 4.7 against 4.4. That said, the two scores are not equally well evidenced: HIIT Interval Timer | Cero has 435 ratings behind it against 37, so its average is the more settled of the two. Written reviews point the same way: 53% of HIIT timer chronometer gym's written reviews are positive against 75% of HIIT Interval Timer | Cero's.

UpkeepUpdate frequency

HIIT timer chronometer gym ships an update every 7 months, HIIT Interval Timer | Cero every 3 days. The most recent releases landed on October 18, 2026 and October 16, 2026 respectively.

Scorecard7 real differences · 3 level
HIIT timer chronometer gym versus HIIT Interval Timer | Cero: the parameters behind the verdict, then further details
ParameterHIIT timer chronometer gymHIIT Interval Timer | Cero
PriceFreeFree
Rating4.4 (37 ratings)4.7 (435 ratings) — better
Positive reviews52.9% of reviews74.6% of reviews — better
Number of ratings37435 — better
Update frequencyEvery 7 monthsEvery 3 days — better
AdsYesYes
In-app purchasesNo — betterYes
MonetizationAd-supported — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, Apple Watch
Requires iOS14.0 — better16.0
Further details — not scored
Size7 MB42 MB
Age rating+44+
DeveloperMireia Lluch OrtolaFlawless Studio LLC

Customer experience

HIIT timer chronometer gym

All ratings37 ratings
Positive83.8%
Neutral5.4%
Negative10.8%
Written reviews70 reviews
Positive52.9%
Neutral10.0%
Negative37.1%

HIIT Interval Timer | Cero

All ratings435 ratings
Positive92.9%
Neutral3.9%
Negative3.2%
Written reviews59 reviews
Positive74.6%
Neutral10.2%
Negative15.3%

User reviews

HIIT timer chronometer gym

From 37 App Store ratings

What we love

  • 👍 Simple and easy to use
  • 🚀 Effective for HIIT workouts
  • 💰 Free to use
  • 👌 Good for basic timing needs
  • 🗣️ Voice control is superb

Room to improve

  • anúncios Annoying ads
  • 🔇 No sound issues
  • 🔒 Screen locks and app stops
  • 👎 Unstable, crashes during workouts
  • 🎛️ Limited customization options

HIIT Interval Timer | Cero

From 435 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

HIIT timer chronometer gym

Reported bugs

16 issues
  • Screen goes to sleep and locks
  • Screen turns off after last update
  • No sound
  • App disappears during workouts
  • Timer stops when screen is locked
Show 11 more
  • App crashes or restarts workouts
  • Ads are intrusive and cannot be closed
  • Timer doesn't count after preparation time
  • Sound signal not working
  • App stops working when device is locked or in background
  • Inverts exercises and repetitions
  • Timer stops when screen turns off
  • Cannot set number of series, time, or repetitions
  • Ads cannot be removed
  • App closes by itself and returns to the beginning of the workout
  • Music playback is blocked when timer starts

Requested features

14 requests
  • Ability to save workout settings
  • Option to create rest periods for stretching
  • Specify series vs. exercises better
  • Basic customization would be useful
  • Landscape mode
Show 9 more
  • Ability to name exercises
  • Saved workouts
  • Apple Watch support
  • Total remaining time display
  • Option for a break every second exercise
  • Ability to modify settings mid-workout without resetting
  • More than one screen for different timer programs
  • Vibration when sound is off
  • Option for configurable sound

HIIT Interval Timer | 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

None

HIIT timer chronometer gym

No in-app purchases

2 purchases

HIIT Interval Timer | Cero

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

Questions

Is HIIT timer chronometer gym free?
HIIT timer chronometer gym is free to download, with no in-app purchases.
Is HIIT Interval Timer | Cero free?
HIIT Interval Timer | Cero is free to download, with in-app purchases available.
Which has better reviews, HIIT timer chronometer gym or HIIT Interval Timer | Cero?
HIIT Interval Timer | Cero is rated higher. HIIT timer chronometer gym averages 4.4 out of 5 from 37 ratings, while HIIT Interval Timer | Cero averages 4.7 from 435 ratings.
Do HIIT timer chronometer gym or HIIT Interval Timer | Cero have ads?
Both HIIT timer chronometer gym and HIIT Interval Timer | Cero show ads.
Which is updated more often, HIIT timer chronometer gym or HIIT Interval Timer | Cero?
HIIT timer chronometer gym ships an update every 7 months, and HIIT Interval Timer | Cero every 3 days. Most recently, HIIT timer chronometer gym was updated on October 18, 2026 and HIIT Interval Timer | Cero on October 16, 2026.

Other comparisons