# Kay Amblyopia Tracker vs Cullen Chart Digital

The clearest difference is update cadence: Kay Amblyopia Tracker at every 2 months against Cullen Chart Digital's every 5 months. On price, ads, 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.

Kay Amblyopia Tracker ships an update every 2 months, Cullen Chart Digital every 5 months. The most recent releases landed on October 4, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Kay Amblyopia Tracker | Cullen Chart Digital |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 5 months |
| Size | 15 MB | 32 MB |
| Requires iOS | 14.1 | **13.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Kay Pictures Ltd](https://appshunter.io/developer/408376964) | [Mark Hughes](https://appshunter.io/developer/1709775356) |

## What reviewers say

### Kay Amblyopia Tracker

[App page](https://appshunter.io/ios/app/kay-amblyopia-tracker/id1505210585)

**In-app purchases:** none


### Cullen Chart Digital

[App page](https://appshunter.io/ios/app/cullen-chart-digital/id1593614277)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Kay Amblyopia Tracker free?

Kay Amblyopia Tracker is free to download, with no in-app purchases.

### Is Cullen Chart Digital free?

Cullen Chart Digital is free to download, with no in-app purchases.

### Do Kay Amblyopia Tracker or Cullen Chart Digital have ads?

Neither Kay Amblyopia Tracker nor Cullen Chart Digital shows ads.

### Which is updated more often, Kay Amblyopia Tracker or Cullen Chart Digital?

Kay Amblyopia Tracker ships an update every 2 months, and Cullen Chart Digital every 5 months. Most recently, Kay Amblyopia Tracker was updated on October 4, 2026 and Cullen Chart Digital on October 10, 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.*