# On Time vs ZeroIn

The clearest difference is update cadence: On Time at every 2 days against ZeroIn's every 3 weeks. On Time also leads on monetization model (free vs free with in-app purchases) and ratings volume (43 vs 1). ZeroIn's advantage is rating (5.0 vs 4.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. On Time sells 3 one-off in-app purchases and ZeroIn sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ZeroIn holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: On Time has 43 ratings behind it against 1, so its average is the more settled of the two.

On Time ships an update every 2 days, ZeroIn every 3 weeks. Both last shipped on October 25, 2026.

## The numbers

| Metric | On Time | ZeroIn |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (43 ratings)](https://appshunter.io/ios/app/on-time-timer-game/id6758968921/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/zeroin-reaction-time-and-reflex/id6788565326/reviews)** |
| Number of ratings | **43** | 1 |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | **Every 2 days** | Every 3 weeks |
| Monetization | **Free** | Free with in-app purchases |
| Size | 72 MB | 54 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Byung Hun Lee](https://appshunter.io/developer/1873891172) | [Emre ALTUN](https://appshunter.io/developer/1852335131) |

## What reviewers say

### On Time

[App page](https://appshunter.io/ios/app/on-time-timer-game/id6758968921)

Test your internal clock by stopping a timer at precisely 10 seconds. Compete globally with three distinct game modes and unlockable themes. It's a simple yet challenging game of timing and focus.

**Highlights:** One-tap gameplay, Three distinct game modes, Extended precision timing, Global leaderboards, Unlockable themes, Daily challenges

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 10 Stars | $0.99 | one-time |
| Remove Ads | $2.99 | one-time |
| 60 Stars | $4.99 | one-time |


### ZeroIn

[App page](https://appshunter.io/ios/app/zeroin-reaction-time-and-reflex/id6788565326)

A reflex game where players stop a timer precisely on target, featuring various timing modes and challenges. Compete with others online or test your skills through hundreds of levels. Boosters and daily rewards help you progress.

**Highlights:** Stopwatch timing challenges, Visible, vanishing, and blind timing modes, Math and time estimation targets, Online reflex duels with leaderboards, Monthly seasons with rewards, Boosters for assistance, Daily rewards and streaks

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Life Refill | $1.99 | one-time |
| Remove Ads | $3.99 | one-time |
| ZeroIn Pro | $9.99 | one-time |


## Frequently asked questions

### Is On Time free?

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

### Is ZeroIn free?

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

### Which has better reviews, On Time or ZeroIn?

ZeroIn is rated higher. On Time averages 4.6 out of 5 from 43 ratings, while ZeroIn averages 5.0 from 1 ratings.

### Do On Time or ZeroIn have ads?

Both On Time and ZeroIn show ads.

### Which is updated more often, On Time or ZeroIn?

On Time ships an update every 2 days, and ZeroIn every 3 weeks. Most recently, On Time was updated on October 25, 2026 and ZeroIn on October 25, 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.*