# Dynamic Visual Acuity vs Sub250

The clearest difference is ads: Sub250 at none against Dynamic Visual Acuity's shown. Sub250 also leads on update cadence (weekly vs every 39 months). Dynamic Visual Acuity's advantage is iOS requirement (14.1 vs 16.4). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Dynamic Visual Acuity ships an update every 39 months, Sub250 weekly. The most recent releases landed on October 2, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Dynamic Visual Acuity | Sub250 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/sub250-reaction-time-test/id6766965152/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 39 months | **Weekly** |
| Monetization | — | Free |
| Size | 6 MB | 49 MB |
| Requires iOS | **14.1** | 16.4 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Saki Inoue](https://appshunter.io/developer/1557109246) | [Pierre Caporossi](https://appshunter.io/developer/1470803775) |

## What reviewers say

### Dynamic Visual Acuity

[App page](https://appshunter.io/ios/app/dynamic-visual-acuity/id6447795260)

**Features:** macOS Compatibility

**In-app purchases:** none


### Sub250

[App page](https://appshunter.io/ios/app/sub250-reaction-time-test/id6766965152)

Measure your reflexes with precision using multiple modes. This app calibrates your device's latency for accurate results and focuses on median scores over luck. It's designed for competitive gamers who need to understand their true reaction speed.

**Highlights:** Multiple reaction-time modes, Device latency calibration, Median score calculation, Anti-anticipation features, No accounts or servers, Local-only data storage

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

**In-app purchases:** none


## Frequently asked questions

### Is Dynamic Visual Acuity free?

Dynamic Visual Acuity is free to download, with no in-app purchases.

### Is Sub250 free?

Sub250 is free to download, with no in-app purchases.

### Do Dynamic Visual Acuity or Sub250 have ads?

Dynamic Visual Acuity shows ads; Sub250 does not.

### Which is updated more often, Dynamic Visual Acuity or Sub250?

Dynamic Visual Acuity ships an update every 39 months, and Sub250 weekly. Most recently, Dynamic Visual Acuity was updated on October 2, 2026 and Sub250 on October 7, 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.*