Comparison

HIIT Interval Timer | Cero vs Better Workout

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

Better Workout

This app helps you achieve fitness goals with customizable interval timers for Tabata, HIIT, and circuit training. It offers guided programs, progress tracking for weight and calories, and rewards for consistency. Designed for simplicity and ease of use during workouts.

Highlights
  • Customizable interval timers
  • Tabata, HIIT, and Circuit training programs
  • Guided exercise sets with sound indicators
  • Create custom time or rep-based workouts
  • Track progress (weight, calories, workout frequency)
  • Achievement system for hitting goals
Features
Read full description

Achieve your fitness goals with the best interval timer app! Be it Tabata, HIIT or Circuit training. Get in the best shape of your life! Better Workout was planned and designed to be as simple as possible and easy to use. Focusing specifically on the workout experience so you have confidence during your workouts. We are excited to continue improving and evolving the app with our Better Workout community in the process. FEATURES Programs Better Workout includes 4 different programs to choose from based on your personal goals. When you choose a program you are guided through a full set of exercises with a big timer, name of the exercise and sound indicator. This takes any guesswork out and keeps you focused on your exercise. Custom Workouts Better Workout allows you to create your own workouts wether time or repetition (reps) based. Create your HiiT workout or your weight lifting session. It's up to you what type of workout you want to do! Progress The path to a fit, healthy life is easier when you can track your progress. Keep track of your progress by weight, calories burned, how many times this week you've worked out. Consistency is key so as you continually hit your goals the app will reward you with achievements along the way! Privacy Policy & Terms of Use: https://www.martinlasek.com/terms-of-use-privacy-policy

Screenshots

HIIT Interval Timer | Cero4 screens
Better Workout4 screens

Verdict

The call

The clearest difference is ads: Better Workout at none against HIIT Interval Timer | Cero's shown. Better Workout also leads on review sentiment (100% vs 75%). HIIT Interval Timer | Cero's advantage is ratings volume (435 vs 25). On price, rating, update cadence 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. HIIT Interval Timer | Cero sells 2 in-app purchases, starting at $2.99 per month and Better Workout sells 8 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

On the App Store both sit at effectively the same score — 4.7 for HIIT Interval Timer | Cero against 4.7 for Better Workout. That said, the two scores are not equally well evidenced: HIIT Interval Timer | Cero has 435 ratings behind it against 25, so its average is the more settled of the two. Written reviews are what separate them: 75% of HIIT Interval Timer | Cero's written reviews are positive against 100% of Better Workout's.

UpkeepUpdate frequency

HIIT Interval Timer | Cero ships an update every 3 days, Better Workout every 6 days. The most recent releases landed on October 12, 2026 and October 1, 2026 respectively.

Scorecard3 real differences · 7 level
HIIT Interval Timer | Cero versus Better Workout: the parameters behind the verdict, then further details
ParameterHIIT Interval Timer | CeroBetter Workout
PriceFreeFree
Rating4.7 (435 ratings) — better4.7 (25 ratings)
Positive reviews74.6% of reviews100.0% of reviews — better
Number of ratings435 — better25
Update frequencyEvery 3 days — betterEvery 6 days
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
DevicesiPhone, iPad, Apple Watch — betteriPhone, iPad
Requires iOS16.016.0
Further details — not scored
Size43 MB10 MB
Age rating4+4+
DeveloperFlawless Studio LLCMartin Lasek

Customer experience

HIIT Interval Timer | Cero

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

Better Workout

All ratings25 ratings
Positive96.0%
Neutral0.0%
Negative4.0%
Written reviews5 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

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

Better Workout

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
8 purchases

Better Workout

Subscriptions6
  • Better Workout Pro (1 Month)$1.991 Month
  • Better Workout Pro (1 Month)7 Days trial$2.991 Month
  • Better Workout Pro (1 Month)$2.991 Month
Show 3 more
  • Better Workout Pro (1 Month)7 Days trial$5.991 Month
  • Better Workout Pro (1 Year)$11.991 Year
  • Better Workout Pro (Yearly)$24.991 Year
One-time2
  • Better Workout Pro (Lifetime)$19.99
  • Better Workout Pro - Lifetime$49.99

Questions

Is HIIT Interval Timer | Cero free?
HIIT Interval Timer | Cero is free to download, with in-app purchases available.
Is Better Workout free?
Better Workout is free to download, with in-app purchases available.
Which has better reviews, HIIT Interval Timer | Cero or Better Workout?
HIIT Interval Timer | Cero is rated higher. HIIT Interval Timer | Cero averages 4.7 out of 5 from 435 ratings, while Better Workout averages 4.7 from 25 ratings.
Do HIIT Interval Timer | Cero or Better Workout have ads?
HIIT Interval Timer | Cero shows ads; Better Workout does not.
Which is updated more often, HIIT Interval Timer | Cero or Better Workout?
HIIT Interval Timer | Cero ships an update every 3 days, and Better Workout every 6 days. Most recently, HIIT Interval Timer | Cero was updated on October 12, 2026 and Better Workout on October 1, 2026.

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