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 app offers a highly customizable interval timer for workouts. Create your own routines or use pre-made templates for various fitness styles. It provides audio and haptic cues for guidance, logs your progress, and keeps your screen active during sessions.

Highlights
  • Custom interval timers
  • Ready-made workout templates
  • Voice and haptic prompts
  • Workout logging and history
  • Active screen mode
  • Unlimited timer creation (Pro)
Features
Read full description

Take control of your workouts with Inter – the most flexible interval timer on iOS. Whether you’re building a custom routine from scratch or launching one of our ready-made templates (cardio, HIIT, Tabata, stretching and more), Inter guides you through every second – with voice prompts, haptics and on-screen cues – so you can focus on crushing your goals. ========== Key Features ========== Custom Interval Timers • Configure warm-up, work time, rest time, round rest time and cooldown • Set number of rounds and repeat cycles • Add and reorder unlimited exercises Ready-Made Templates Choose from dozens of starter workouts: • Cardio intervals • HIIT burns • Tabata sprints • Stretch & mobility flows Audio & Haptics • Voice prompts for exercise names, rest, countdowns, warm-up, cooldown & workout completion • Adjustable voice, volume & countdown start point • Haptic cues for hands-free guidance Active Screen & Accessibility • Keep your screen awake during workouts • Toggle between minute/second display for maximum visibility Workout Logging & History • Automatic logging of every completed timer • Track your progress over days, weeks and months • Review logs and total time spent Pro Version • Create unlimited timers and templates • Access exclusive workout packs and advanced audio settings • Unlock priority support Why Inter? Most interval apps lock you into a single timer or rigid templates. Inter puts you in the driver’s seat: • Build any routine you can imagine • Jump straight into your favorite workout • Focus on performance, not fiddling with your phone Download Inter today and start every workout with confidence! Payment will be charged to your Apple ID account at the confirmation of purchase. The 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 before the end of the current period. You can manage and cancel your subscriptions by going to your App Store account settings after purchase. Cancellation of the current active subscription period is not allowed. Terms of Use: https://pattammaro.com/inter/terms-of-use Privacy Policy: https://pattammaro.com/inter/privacy-policy

Screenshots

HIIT Interval Timer | Cero4 screens
Interval Timer4 screens

Verdict

The call

The clearest difference is ads: Interval Timer at none against HIIT Interval Timer | Cero's shown. Interval Timer also leads on rating (5.0 vs 4.7). HIIT Interval Timer | Cero's advantage is ratings volume (435 vs 1) and device support (3 vs 1). 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 Interval Timer sells 2 in-app purchases, starting at $2.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Interval Timer holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: HIIT Interval Timer | Cero has 435 ratings behind it against 1, so its average is the more settled of the two.

Scorecard4 real differences · 6 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)5.0 (1 ratings) — better
Positive reviews74.6% of reviews—
Number of ratings435 — better1
Update frequencyEvery 2 weeks—
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
DevicesiPhone, iPad, Apple Watch — betteriPhone
Requires iOS16.0 — better17.0
Further details — not scored
Size42 MB24 MB
Age rating4+4+
DeveloperFlawless Studio LLCPatrick Tammaro

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 ratings1 ratings
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

Interval Timer

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

HIIT Interval Timer | Cero

One-time1
  • Cero Pro$3.99
2 purchases

Interval Timer

Subscriptions1
  • Pro3 Days trial$2.997 Days
One-time1
  • Lifetime$14.99

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?
Interval Timer is rated higher. HIIT Interval Timer | Cero averages 4.7 out of 5 from 435 ratings, while Interval Timer averages 5.0 from 1 ratings.
Do HIIT Interval Timer | Cero or Interval Timer have ads?
HIIT Interval Timer | Cero shows ads; Interval Timer does not.

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