HIIT Interval Timer | Cero

Name: HIIT Interval Timer | Cero
Rating: 4.7 (435 reviews)
Author: Flawless Studio LLC

By: Flawless Studio LLC App

Tabata, Gym & Boxing Workout

Overview

Version:

4.1.2

Last updated: 2026-09-18

Ranking

#76,804 ▼ 62

Overall

Features & Capabilities

Cero is a flexible interval timer for HIIT, Tabata, circuit training, WODs, EMOM workouts, boxing rounds, indoor cycling and HYROX preparation. Create simple work-and-rest timers or detailed sessions with custom intervals, warm-ups, cool-downs, sets, colors, icons and intensity levels.

Stay focused with large controls, reliable audio and voice cues, vibrations, interval music, Live Activities, Dynamic Island support, Home Screen widgets, Siri and Shortcuts. Use Gym Display on a larger screen, share workouts by file or QR code, and access saved sessions from Apple Watch. Adaptive HR can adjust recovery based on your target heart rate and provide effort alerts using Apple Watch or a compatible Bluetooth monitor. Cero also includes a countdown, lap stopwatch, workout history, Apple Health integration and automatic iCloud backups.

User Growth & Download Statistics

App Sports Task Management Music & Audio

By:

Flawless Studio LLC

Rating:

4.70

(435)

Version:

4.1.2 Last updated: 2026-09-18

Version code:

891556685

Creation date:

2017-07-15

Compatible devices:

Size:

41.64MB

URLs:

Website ,Privacy policy

Full description:

Source:

Apple Apps Store

Data ingested on:

2026-09-21

Compare stats and ranking:

Ranking

# 76,804 ▼ 62

For Developers

Monetize with App Pass Boost with Extension Booster

Contact the developer

Chrome-Stats does not own this Apple app. Please use these information below to contact the Apple app developer.

Developed by:

Flawless Studio LLC

Apple Apps Store

https://apps.apple.com/us/app/hiit-interval-timer-cero/id1256319392

Website:

http://cero.app

User Reviews

Users praise Interval Timer | Cero for its versatility and ease of use, plus a welcome one-time price. It’s widely viewed as a top interval timer for HIIT and related routines. Recurring drawbacks include ads and forced updates, battery drain, weak end-of-interval alerts on devices, and usability gaps such as lack of background music support and typing time values rather than using plus/minus.

Pros

Versatile and feature-rich timer suitable for HIIT, Tabata, AMRAP, EMOM, and more.
Easy to set up, customize, and name timers with a clean, intuitive UI.
One-time purchase price with no mandatory subscription.
Reliable performance and strong user reputation; many call it the best interval timer.
Good value with extensive settings, even in the free version.

Cons

Ads appear after updates or force updates, which can be off-putting.
Battery drain/background usage when the app runs.
Cannot listen to music in the background while using the timer.
End-of-interval alerts (beep/haptic) can be weak or inaudible on phone/watch.
Time entry is cumbersome (plus/minus only; would like to type numbers) and occasional UI quirks like landscape rotation after updates.