Comparison

iCountTimer 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

iCountTimer

This app combines a timer and counter for various training routines like HIIT, yoga, and boxing. It offers audio cues and a large display to keep you focused on your workout, with an optional Pro version for advanced features.

Highlights
  • Timer and counter combined
  • Save custom presets
  • Large, clear display
  • Audio cues
  • Smart screen lock
  • Health app integration (Pro)
Features
Read full description

Focus on your moves, not the count. iCountTimer is a timer and counter in one — built for anyone who trains. Whether it's interval training, yoga, home workouts, HIIT, boxing, or circuit training, this app fits right in and keeps you on track. Set your intervals, hit start, and let the app do the counting. Audio cues and a large, clear display with progress bar guide you through every session so you can stay focused on your form. What users are saying: "Best and most versatile timer app I have used. If you mix up your workouts and need a flexible solution to keep time, reps and more — download this now!" — Eric Mullen "As a coach, the best. Best timer ever. I speak as a coach who has tried many timer apps and this is the easiest way to set up interval training ever." — Todd Parker "Been looking for something like this for a while. Now I know how many sets I've done without guessing, and I can concentrate on what I should be doing." — Mark Clews Features: • Timer + Counter combined in one app • Save timers and counters as presets organized by activity • Large, clear display with progress bar • Audio cues to guide your sessions • Smart screen lock to prevent accidental taps mid-workout Upgrade to iCountTimer Pro for more: • No ads • Live Activity on your Lock Screen • Apple Watch app with presets and quick-access timer and counter • Save up to 40 presets • 5 themes and custom alert sounds • Calorie estimation with Health app integration • Custom start delay and multiple counter modes iCountTimer is free with all the essentials. When you're ready for more, go Pro. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

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

iCountTimer4 screens
HIIT Interval Timer | Cero4 screens

Verdict

The call

The clearest difference is update cadence: HIIT Interval Timer | Cero at every 3 days against iCountTimer's every 4 months. HIIT Interval Timer | Cero also leads on ratings volume (435 vs 12). iCountTimer's advantage is review sentiment (90% vs 75%). On price, rating, 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. iCountTimer sells 3 in-app purchases, starting at $1.99 per month and HIIT Interval Timer | Cero sells 1 one-off in-app purchase. 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 iCountTimer against 4.7 for HIIT Interval Timer | Cero. That said, the two scores are not equally well evidenced: HIIT Interval Timer | Cero has 435 ratings behind it against 12, so its average is the more settled of the two. Written reviews are what separate them: 90% of iCountTimer's written reviews are positive against 75% of HIIT Interval Timer | Cero's.

UpkeepUpdate frequency

iCountTimer ships an update every 4 months, HIIT Interval Timer | Cero every 3 days. The most recent releases landed on September 27, 2026 and September 29, 2026 respectively.

Scorecard3 real differences · 7 level
iCountTimer versus HIIT Interval Timer | Cero: the parameters behind the verdict, then further details
ParameteriCountTimerHIIT Interval Timer | Cero
PriceFreeFree
Rating4.7 (12 ratings)4.7 (435 ratings)
Positive reviews90.1% of reviews — better74.6% of reviews
Number of ratings12435 — better
Update frequencyEvery 4 monthsEvery 3 days — better
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, Apple WatchiPhone, iPad, Apple Watch
Requires iOS16.016.0
Further details — not scored
Size24 MB42 MB
Age rating4+4+
DeveloperRhythmicWorksFlawless Studio LLC

Customer experience

iCountTimer

All ratings12 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews91 reviews
Positive90.1%
Neutral5.5%
Negative4.4%

HIIT Interval Timer | Cero

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

Bugs and requests

iCountTimer

Not enough reviews yet to summarise bugs or requests.

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

3 purchases

iCountTimer

Subscriptions2
  • Monthly Subscription$1.991 Month
  • Yearly Subscription$9.991 Year
One-time1
  • Lifetime Pro$19.99
1 purchases

HIIT Interval Timer | Cero

One-time1
  • Cero Pro$3.99

Questions

Is iCountTimer free?
iCountTimer is free to download, with in-app purchases available.
Is HIIT Interval Timer | Cero free?
HIIT Interval Timer | Cero is free to download, with in-app purchases available.
Which has better reviews, iCountTimer or HIIT Interval Timer | Cero?
iCountTimer and HIIT Interval Timer | Cero are both rated 4.7 out of 5 on the App Store, from 12 and 435 ratings respectively.
Do iCountTimer or HIIT Interval Timer | Cero have ads?
Both iCountTimer and HIIT Interval Timer | Cero show ads.
Which is updated more often, iCountTimer or HIIT Interval Timer | Cero?
iCountTimer ships an update every 4 months, and HIIT Interval Timer | Cero every 3 days. Most recently, iCountTimer was updated on September 27, 2026 and HIIT Interval Timer | Cero on September 29, 2026.

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