# Stop vs ZeroIn

The clearest difference is update cadence: ZeroIn at every 3 weeks against Stop's every 3 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Stop sells 3 in-app purchases, starting at $1.99 per month and ZeroIn sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Stop ships an update every 3 months, ZeroIn every 3 weeks. The most recent releases landed on October 6, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | Stop | ZeroIn |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/zeroin-reaction-time-and-reflex/id6788565326/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 43 MB | 54 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Gary Bennett](https://appshunter.io/developer/1848817343) | [Emre ALTUN](https://appshunter.io/developer/1852335131) |

## What reviewers say

### Stop

[App page](https://appshunter.io/ios/app/stop-it/id6754552103)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| monthly_premium | $1.99 | per month |
| Unlimited Lives | $1.99 | one-time |
| Premium Lifetime | $3.99 | 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 Stop free?

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

### Is ZeroIn free?

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

### Do Stop or ZeroIn have ads?

Both Stop and ZeroIn show ads.

### Which is updated more often, Stop or ZeroIn?

Stop ships an update every 3 months, and ZeroIn every 3 weeks. Most recently, Stop was updated on October 6, 2026 and ZeroIn on October 21, 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.*