# TimeFit vs HIIT Interval Timer | Cero

The clearest difference is update cadence: HIIT Interval Timer | Cero at every 3 days against TimeFit's fortnightly. HIIT Interval Timer | Cero also leads on iOS requirement (16.0 vs 18.0). On price, rating, review sentiment and ratings volume there is nothing between them.

Both are free to download. TimeFit sells 4 in-app purchases, starting at $3.99 per month and HIIT Interval Timer | Cero sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.7 for TimeFit against 4.7 for HIIT Interval Timer | Cero. Both are backed by a comparable volume of ratings — 321 and 435 respectively. Written reviews split almost evenly too, at 75% and 75% positive.

TimeFit ships an update fortnightly, HIIT Interval Timer | Cero every 3 days. Both last shipped on October 12, 2026.

## The numbers

| Metric | TimeFit | HIIT Interval Timer | Cero |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (321 ratings)](https://appshunter.io/ios/app/timefit-interval-timer/id1180413207/reviews) | **[4.7 (435 ratings)](https://appshunter.io/ios/app/hiit-interval-timer-cero/id1256319392/reviews)** |
| Number of ratings | 321 | **435** |
| Positive reviews | **74.8% of reviews** | 74.6% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Fortnightly | **Every 3 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 55 MB | 43 MB |
| Requires iOS | 18.0 | **16.0** |
| Devices | iPhone, Apple Watch | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Samir Mestari](https://appshunter.io/developer/1104666243) | [Flawless Studio LLC](https://appshunter.io/developer/1228312508) |

## What reviewers say

### TimeFit

[App page](https://appshunter.io/ios/app/timefit-interval-timer/id1180413207)

Create custom workout routines for various training methods like HIIT, Tabata, and Crossfit. This app offers interval timers, voice alerts, and a smart stopwatch to enhance your fitness sessions. Track your progress with a workout history log and share routines with others.

**Highlights:** Custom interval timer, HIIT and Tabata support, Voice alerts for exercises, Smart stopwatch with lap tracking, Workout history and notes, Workout sharing, Organized workout folders

**Features:** macOS Compatibility, Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $3.99 | per month |
| Yearly (Recommended) | $17.99 | per year |
| Upgrade to Pro | $6.99 | one-time |
| Upgrade to Pro | $8.99 | one-time |

**What reviewers like**

- 👍 Easy to use and configure
- 💪 Highly customizable workouts
- 🎵 Works with music in background
- 🗣️ Voice prompts for next exercise
- 💰 Good value for money (paid version)

**What reviewers complain about**

- 💸 Expensive for full features
-  quảng cáo Frequent and intrusive ads
- 🐛 Crashes frequently
- 🔒 Paywall for essential features
- 🗑️ Free version limited

**Reported bugs**

- Lost all data after update
- Crashes every time on opening
- Freezes on introductory pop-up
- Crashes randomly with voice alert language change
- Free version doesn't play timer

**Requested features**

- Apple Watch compatibility
- iPad adaptation
- Visual statistics/graphs
- Independent voice volume control
- Ability to share workouts


### HIIT Interval Timer | Cero

[App page](https://appshunter.io/ios/app/hiit-interval-timer-cero/id1256319392)

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:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Cero Pro Monthly | $2.99 | per month |
| Cero Pro | $14.99 | one-time |

**What reviewers like**

- 👍 Simple and straightforward
- 👍 Very practical and customizable
- 👍 Great for HIIT and Tabata
- 👍 Clear design and easy to use
- 👍 Good value, no subscription

**What reviewers complain about**

- 🔋 Drains battery
- 🎶 Music playback interrupted
- ⚠️ Ads interrupt timers
- 🔊 Weak or non-functional sound/haptics
- 🔄 Forced updates

**Reported bugs**

- 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**

- 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


## Frequently asked questions

### Is TimeFit free?

TimeFit is free to download, with in-app purchases available.

### Is HIIT Interval Timer | Cero free?

HIIT Interval Timer | Cero is free to download, with in-app purchases available.

### Which has better reviews, TimeFit or HIIT Interval Timer | Cero?

HIIT Interval Timer | Cero is rated higher. TimeFit averages 4.7 out of 5 from 321 ratings, while HIIT Interval Timer | Cero averages 4.7 from 435 ratings.

### Do TimeFit or HIIT Interval Timer | Cero have ads?

Both TimeFit and HIIT Interval Timer | Cero show ads.

### Which is updated more often, TimeFit or HIIT Interval Timer | Cero?

TimeFit ships an update fortnightly, and HIIT Interval Timer | Cero every 3 days. Most recently, TimeFit was updated on October 12, 2026 and HIIT Interval Timer | Cero on October 12, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*