Comparison

HIIT Interval Timer | Cero vs Interval Timer

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

Head to head
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/

About

Interval Timer

This versatile timer assists with various fitness routines, including HIIT, Tabata, and boxing. It also functions as a productivity timer for tasks like Pomodoro. Easily configure intervals, sets, and rest periods for personalized workouts.

Highlights
  • HIIT and Tabata workout timer
  • Boxing and martial arts round timer
  • Productivity and Pomodoro timer
  • Customizable interval and set configurations
  • Templates for quick setup
  • Supports various fitness exercises
Features
Read full description

Nice and simple Interval Timer for your Workouts. Perfect for HIIT, Tabata, Boxing, WOD, Crossfit and Fitness. Tabata Timer: Interval Timer for HIIT Workout Simple and convinient interval workout timer app for high intensity interval training (HIIT timer). Perfect stopwatch or countdown timer for your workouts. Fitness Timer for Interval Training This Tabata Timer is perfect for home workouts and daily workout routines for all your main muscle groups. You can use this circuit timer at gym and for home workout. In just a few minutes a day, you can build muscles and keep fitness with just your body weight. Use this hiit timer for fitness training for high intensity interval training at home or at gym. Boxing Timer - Round Timer for Martial Arts This workout timer can be used as Boxing Timer. You can set the number of boxing rounds, length of each round and rest interval. Use boxing timer for martial arts. Boxing timer can save templates for different fighting sports: Boxing, MMA, Kickboxing, Karate, Judo, Taekwondo, Jujutsu, Muay Thai, Aikido, Krav Maga, Capoeira, Wrestling etc. Productivity Timer - Pomodoro Timer You can even use this timer as a productivity timer or pomodoro timer to focus on your work tasks. Stay focused and productive with pomodoro timer. Configure and save pomodoro preset to use this productivity timer as pomodoro timer. Home Workout Timer - 7 Minute Workout Looking for home workout timer? This interval timer is perfect for 7 minute workout. Do you like 7 minute abs workout, abs workout at home, home workout with no equipment? This tabata timer will be useful for home exercises, home training and fitness at home. Warmup Timer - Round timer for Stretching and Morning Exercises Warmup and stretching is an important part of workout. If you do stretching and morning exercises every day, use this Warmup timer. This fitness timer for morning exercises has templates feature that allows you to start morning exercises in 1 click. Kitchen timer - Steak Timer, Egg Timer, Cooking Timer Going to cook a steak? Have a lot of cooking recipes in your kitchen book? Use this timer as kitchen timer. Kitchen timer can be used as steam timer, egg timer. Egg timer is perfect for egg cooking, steak timer will help to cook a steak. You can use this cooking timer for any cooking recipes in your kitchen book. Easy configuration - fast timer setup - Set warmup seconds time - Configure seconds timer for workout interval - Configure rest interval seconds - Enter amount of workout sets - Click start button Perfect for all exercises This timer can be uses as: workout timer, interval timer, tabata timer, hiit timer or circuit timer for your workouts. Timer is perfect for all kinds of exercises, including: - Tabata workouts - Boxing rounds - HIIT workouts (High Intensity Inverval Training) - Home Workout - Gym Workout - Training with weights - Bodyweight exercises - 7 minute abs workout - Weight loss workout - 5K Run - Interval Running - Six pack abs workout - Yoga and Meditation - WOD - TRX - Cardio exercises - Calisthenics - Stretching exercises - Kettlebells - Crossfit - Cycling or Exercise bike - Circuit workout - or any other high intensity interval training MAIN FEATURES: - Nice and simple ui - Fast timer setup - Templates to save your settings Try Tabata Timer: Interval Timer for HIIT Workout now!

Screenshots

HIIT Interval Timer | Cero4 screens
Interval Timer4 screens

Verdict

The call

The clearest difference is review sentiment: HIIT Interval Timer | Cero at 75% against Interval Timer's 29%. HIIT Interval Timer | Cero also leads on update cadence (every 3 days vs every 5 months) and rating (4.7 vs 4.5). Interval Timer's advantage is ads (none vs shown) and iOS requirement (12.0 vs 16.0). On price, ratings volume, in-app purchases and monetization model 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 and Interval Timer sells 3 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

HIIT Interval Timer | Cero holds the better App Store score, 4.7 against 4.5. Both are backed by a comparable volume of ratings — 435 and 149 respectively. Written reviews point the same way: 75% of HIIT Interval Timer | Cero's written reviews are positive against 29% of Interval Timer's.

UpkeepUpdate frequency

HIIT Interval Timer | Cero ships an update every 3 days, Interval Timer every 5 months. The most recent releases landed on October 7, 2026 and October 1, 2026 respectively.

Scorecard5 real differences · 5 level
HIIT Interval Timer | Cero versus Interval Timer: the parameters behind the verdict, then further details
ParameterHIIT Interval Timer | CeroInterval Timer
PriceFreeFree
Rating4.7 (435 ratings) — better4.5 (149 ratings)
Positive reviews74.6% of reviews — better29.4% of reviews
Number of ratings435 — better149
Update frequencyEvery 3 days — betterEvery 5 months
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, Apple WatchiPhone, iPad, iPod
Requires iOS16.012.0 — better
Further details — not scored
Size42 MB11 MB
Age rating4+4+
DeveloperFlawless Studio LLCDMYTRO DOLOTOV

Customer experience

HIIT Interval Timer | Cero

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

Interval Timer

All ratings149 ratings
Positive87.2%
Neutral5.4%
Negative7.4%
Written reviews17 reviews
Positive29.4%
Neutral5.9%
Negative64.7%

Bugs and 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

Interval Timer

Not enough reviews yet to summarise bugs or requests.

In-app purchases

2 purchases

HIIT Interval Timer | Cero

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

Interval Timer

Subscriptions1
  • 1 Month Access$1.991 Month
One-time2
  • Lifetime Access -50%$4.99
  • Lifetime Access$9.99

Questions

Is HIIT Interval Timer | Cero free?
HIIT Interval Timer | Cero is free to download, with in-app purchases available.
Is Interval Timer free?
Interval Timer is free to download, with in-app purchases available.
Which has better reviews, HIIT Interval Timer | Cero or Interval Timer?
HIIT Interval Timer | Cero is rated higher. HIIT Interval Timer | Cero averages 4.7 out of 5 from 435 ratings, while Interval Timer averages 4.5 from 149 ratings.
Do HIIT Interval Timer | Cero or Interval Timer have ads?
HIIT Interval Timer | Cero shows ads; Interval Timer does not.
Which is updated more often, HIIT Interval Timer | Cero or Interval Timer?
HIIT Interval Timer | Cero ships an update every 3 days, and Interval Timer every 5 months. Most recently, HIIT Interval Timer | Cero was updated on October 7, 2026 and Interval Timer on October 1, 2026.

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