Comparison

HIIT Interval Timer | Cero vs Workout Timer App

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

Workout Timer App

Create and manage custom interval timers for your workouts. This app integrates with Apple Health to track your fitness data and offers a variety of alert sounds to keep you motivated. Build tailored routines to achieve your fitness goals.

Highlights
  • Customizable workout timers
  • Apple Health integration
  • Pre-configured workout timers
  • Powerful timer editor
  • Customizable alert sounds
  • Workout activity type selection
Read full description

It's time to Push! Build your own tailored workout and reach your fitness goals. Push! Workout Timer brings Apple Health integration to your iPhone. Featuring a bunch of timers to get you up and running, and a powerful timer editor to create your own custom workout timer. Features: • integration with Apple Health so that your Fitness data is up to date (close those rings!) • the full collection of workout activity types to choose from • a starter collection of pre-configured workout timers • a powerful timer editor • notifications to keep you on task when switching apps • a long list of alert sounds to configure your timer with • developed with indie passion Push! Workout Timer Premium Subscription Upgrade to access all features Payment will be charged to your Apple ID account at the confirmation of purchase. Subscription automatically renews unless it is canceled at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours prior to the end of the current period. You can manage and cancel your subscriptions by going to your account settings on the App Store after purchase. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

HIIT Interval Timer | Cero4 screens
Workout Timer App4 screens

Verdict

The call

The clearest difference is ads: Workout Timer App at none against HIIT Interval Timer | Cero's shown. Workout Timer App also leads on review sentiment (100% vs 75%). HIIT Interval Timer | Cero's advantage is update cadence (every 3 days vs every 2 months) and rating (4.7 vs 4.3). On price, in-app purchases, monetization model and iOS requirement 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 1 one-off in-app purchase and Workout Timer App sells 5 in-app purchases, starting at $4.99 per 7 days. 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 4.3. That said, the two scores are not equally well evidenced: HIIT Interval Timer | Cero has 435 ratings behind it against 3, so its average is the more settled of the two. Written reviews complicate that: 75% of HIIT Interval Timer | Cero's written reviews are positive against 100% of Workout Timer App's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

HIIT Interval Timer | Cero ships an update every 3 days, Workout Timer App every 2 months. The most recent releases landed on September 29, 2026 and September 21, 2026 respectively.

Scorecard6 real differences · 4 level
HIIT Interval Timer | Cero versus Workout Timer App: the parameters behind the verdict, then further details
ParameterHIIT Interval Timer | CeroWorkout Timer App
PriceFreeFree
Rating4.7 (435 ratings) — better4.3 (3 ratings)
Positive reviews74.6% of reviews100.0% of reviews — better
Number of ratings435 — better3
Update frequencyEvery 3 days — betterEvery 2 months
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
DevicesiPhone, iPad, Apple Watch — betteriPhone
Requires iOS16.016.0
Further details — not scored
Size42 MB65 MB
Age rating4+4+
DeveloperFlawless Studio LLCFoobar Creative

Customer experience

HIIT Interval Timer | Cero

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

Workout Timer App

All ratings3 ratings
Positive66.7%
Neutral33.3%
Negative0.0%
Written reviews1 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

Workout Timer App

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

HIIT Interval Timer | Cero

One-time1
  • Cero Pro$3.99
5 purchases

Workout Timer App

Subscriptions4
  • Workout Timer Premium Weekly3 Days trial$4.997 Days
  • Workout Timer Premium Monthly$6.991 Month
  • Workout Timer Premium Yearly7 Days trial$29.991 Year
Show 1 more
  • Workout Timer Premium Yearly$29.991 Year
One-time1
  • Premium Lifetime$29.99

Questions

Is HIIT Interval Timer | Cero free?
HIIT Interval Timer | Cero is free to download, with in-app purchases available.
Is Workout Timer App free?
Workout Timer App is free to download, with in-app purchases available.
Which has better reviews, HIIT Interval Timer | Cero or Workout Timer App?
HIIT Interval Timer | Cero is rated higher. HIIT Interval Timer | Cero averages 4.7 out of 5 from 435 ratings, while Workout Timer App averages 4.3 from 3 ratings.
Do HIIT Interval Timer | Cero or Workout Timer App have ads?
HIIT Interval Timer | Cero shows ads; Workout Timer App does not.
Which is updated more often, HIIT Interval Timer | Cero or Workout Timer App?
HIIT Interval Timer | Cero ships an update every 3 days, and Workout Timer App every 2 months. Most recently, HIIT Interval Timer | Cero was updated on September 29, 2026 and Workout Timer App on September 21, 2026.

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