Comparison

Interval Timer for HIIT | 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

Interval Timer for HIIT | Cero

Create custom interval workouts for HIIT, Tabata, and circuit training. This app offers detailed programming with custom intervals, colors, and icons. Stay focused with large controls, clear cues, and optional heart rate training.

Highlights
  • Customizable interval programming
  • Heart rate training integration
  • Live Activities and Dynamic Island support
  • Siri and Shortcuts integration
  • Workout history and calorie tracking
  • Apple Watch app
  • Shareable timers
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

Features
Read full description

Tempo Fit is an interval timer and workout planner designed for HIIT, Tabata, circuit training, running intervals, strength training and home workouts. Build your own interval workouts, follow ready-made routines and track your training progress — all in one app. Tempo Fit is free to download and includes a Custom Interval Timer, basic workout history and progress tracking. Additional workouts, planning tools and advanced features require an optional Premium subscription. FREE FEATURES • Custom Interval Timer Create personalised workouts with adjustable work and rest intervals, exercises and rounds. Add warm-up and cool-down periods, and follow your routine with a clear countdown display. • Try Ready Workouts Explore 21 pre-built Tempo Fit workouts covering different fitness levels and training styles. Free users can start up to 3 Ready Workouts in total. Unlimited access requires Premium. • Basic Workout History View your recent workout activity and completed training sessions. • Basic Progress Tracking Monitor your workout activity and consistency with essential training statistics. • Audio and Countdown Alerts Stay focused with interval notifications, countdown cues and customisable timer settings. PREMIUM FEATURES — SUBSCRIPTION REQUIRED Upgrade to Tempo Fit Premium to unlock: • Unlimited Ready Workouts Access all 21 pre-built workouts without the free-use restriction. • Save Custom Workouts Save and reuse your personalised interval routines. • Weekly Workout Plans Create and manage structured training schedules to help organise your workouts. • Full Workout History Access extended workout history and review your previous training sessions. • Advanced Progress and Insights Explore detailed training statistics, trends and workout progress. • Ad-Free Experience Enjoy Tempo Fit without banner advertisements. PREMIUM SUBSCRIPTIONS Tempo Fit Premium is available through optional monthly and yearly auto-renewable subscriptions. Eligible new subscribers may receive a 7-day free trial with the yearly subscription. After the trial ends, the subscription automatically renews at the price shown during purchase unless cancelled. Subscriptions can be managed or cancelled through your Apple Account settings. You can continue using Tempo Fit's free features without subscribing. Whether you're training at home, preparing for a fitness class or building your own HIIT routine, Tempo Fit helps you organise your intervals and stay consistent with your workouts. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://sites.google.com/view/intervaltimer-privacypolicy

Screenshots

Interval Timer for HIIT | Cero4 screens
Interval Timer4 screens

Verdict

The call

The clearest difference is update cadence: Interval Timer for HIIT | Cero at every 3 days against Interval Timer's every 2 months. Interval Timer's advantage is iOS requirement (15.1 vs 18.0). On price, ads, in-app purchases and device support 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. Interval Timer for HIIT | Cero sells 2 in-app purchases, starting at $2.99 per month and Interval Timer sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Interval Timer for HIIT | Cero ships an update every 3 days, Interval Timer every 2 months. The most recent releases landed on November 11, 2026 and November 10, 2026 respectively.

Scorecard2 real differences · 8 level
Interval Timer for HIIT | Cero versus Interval Timer: the parameters behind the verdict, then further details
ParameterInterval Timer for HIIT | CeroInterval Timer
PriceFreeFree
Rating4.7 (441 ratings) — better—
Positive reviews74.6% of reviews—
Number of ratings441 — better—
Update frequencyEvery 3 days — betterEvery 2 months
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, Apple Watch — betteriPhone, iPod
Requires iOS18.015.1 — better
Further details — not scored
Size59 MB62 MB
Age rating4+4+
DeveloperFlawless Studio LLCJayendra Parmar

Bugs and requests

Interval Timer for HIIT | 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

Interval Timer for HIIT | Cero

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

Interval Timer

Subscriptions2
  • Premium Monthly$2.991 Month
  • Premium Yearly7 Days trial$19.991 Year

Questions

Is Interval Timer for HIIT | Cero free?
Interval Timer for HIIT | 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.
Do Interval Timer for HIIT | Cero or Interval Timer have ads?
Both Interval Timer for HIIT | Cero and Interval Timer show ads.
Which is updated more often, Interval Timer for HIIT | Cero or Interval Timer?
Interval Timer for HIIT | Cero ships an update every 3 days, and Interval Timer every 2 months. Most recently, Interval Timer for HIIT | Cero was updated on November 11, 2026 and Interval Timer on November 10, 2026.

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