# AtopOf vs Driver Reaction Timer

The clearest difference is price: Driver Reaction Timer at Free against AtopOf's $0.99. Driver Reaction Timer also leads on update cadence (every 4 months vs every 93 months) and iOS requirement (13.0 vs 17.2). On ads, in-app purchases and device support there is nothing between them.

Driver Reaction Timer is free to download; AtopOf costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

AtopOf ships an update every 93 months, Driver Reaction Timer every 4 months. The most recent releases landed on October 26, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | AtopOf | Driver Reaction Timer |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 93 months | **Every 4 months** |
| Size | 13 MB | 19 MB |
| Requires iOS | 17.2 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ZoliTech](https://appshunter.io/developer/559472506) | [Hugo De Beys](https://appshunter.io/developer/1740253086) |

## What reviewers say

### AtopOf

[App page](https://appshunter.io/ios/app/atopof/id1132849626)

**Features:** macOS Compatibility

**In-app purchases:** none


### Driver Reaction Timer

[App page](https://appshunter.io/ios/app/driver-reaction-timer/id6747767670)

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

**In-app purchases:** none


## Frequently asked questions

### Is AtopOf free?

AtopOf costs $0.99, with no in-app purchases.

### Is Driver Reaction Timer free?

Driver Reaction Timer is free to download, with no in-app purchases.

### Do AtopOf or Driver Reaction Timer have ads?

Neither AtopOf nor Driver Reaction Timer shows ads.

### Which is updated more often, AtopOf or Driver Reaction Timer?

AtopOf ships an update every 93 months, and Driver Reaction Timer every 4 months. Most recently, AtopOf was updated on October 26, 2026 and Driver Reaction Timer on October 9, 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.*