# Visual Acuity Test on App! vs カロトレ

The clearest difference is in-app purchases: Visual Acuity Test on App! at none against カロトレ's 2. Visual Acuity Test on App! also leads on iOS requirement (13.0 vs 26.0). カロトレ's advantage is ads (none vs shown) and update cadence (every 4 days vs every 23 months). On price and device support there is nothing between them.

Both are free to download. カロトレ sells 2 in-app purchases, starting at $2.99 per month. Visual Acuity Test on App! asks for nothing beyond the download.

Visual Acuity Test on App! ships an update every 23 months, カロトレ every 4 days. The most recent releases landed on November 6, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Visual Acuity Test on App! | カロトレ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/visual-acuity-test-on-app/id1110350296/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 28.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 23 months | **Every 4 days** |
| Monetization | Ad-supported | — |
| Size | 7 MB | 16 MB |
| Requires iOS | **13.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Yuki Takeda](https://appshunter.io/developer/1021096508) | [KAROTORE](https://appshunter.io/developer/6788787526) |

## What reviewers say

### Visual Acuity Test on App!

[App page](https://appshunter.io/ios/app/visual-acuity-test-on-app/id1110350296)

Test your eyesight from home with this app. Hold your smartphone 50cm away and identify the direction of a waning circle to assess your visual acuity.

**Highlights:** Eyesight testing, Visual acuity assessment, Distance-based testing, Directional circle identification

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Convenient for quick checks
- 👍 No ads mentioned by some users
- 👍 Can be useful as a rough estimate
- 👍 Simple and straightforward interface
- 👍 Some users find it accurate

**What reviewers complain about**

- 😞 Inaccurate readings compared to eye exams
- 😞 Results vary significantly
- 😞 Maximum reading is often 1.5
- 😞 Difficulty for low vision users
- 😞 Unclear about screen size assumptions

**Reported bugs**

- Arrow selection area obscured by test elements
- Test elements overlap with selection buttons
- Landolt ring shape is incorrect
- Maximum vision measurement is capped at 1.5

**Requested features**

- Fix overlapping elements on the screen
- Improve accuracy for low vision users
- Support for astigmatism testing
- More clear instructions for users with poor vision
- Increase the maximum measurable vision beyond 1.5


### カロトレ

[App page](https://appshunter.io/ios/app/id6788787523)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| カロトレPro | $2.99 | per month |
| 表示名: カロトレPro（年額・お得） | $29.99 | per year |


## Frequently asked questions

### Is Visual Acuity Test on App! free?

Visual Acuity Test on App! is free to download, with no in-app purchases.

### Is カロトレ free?

カロトレ is free to download, with in-app purchases available.

### Do Visual Acuity Test on App! or カロトレ have ads?

Visual Acuity Test on App! shows ads; カロトレ does not.

### Which is updated more often, Visual Acuity Test on App! or カロトレ?

Visual Acuity Test on App! ships an update every 23 months, and カロトレ every 4 days. Most recently, Visual Acuity Test on App! was updated on November 6, 2026 and カロトレ on October 31, 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.*