# 屈折度数 ORT.com vs 音読・読み上げ音声作成

The clearest difference is price: 音読・読み上げ音声作成 at Free against 屈折度数 ORT.com's $0.99. 音読・読み上げ音声作成 also leads on update cadence (every 2 weeks vs every 39 months) and iOS requirement (15.6 vs 26.0). 屈折度数 ORT.com's advantage is in-app purchases (none vs 4) and ads (none vs shown). On device support there is nothing between them.

音読・読み上げ音声作成 is free to download; 屈折度数 ORT.com costs $0.99 up front. 音読・読み上げ音声作成 sells 4 one-off in-app purchases. 屈折度数 ORT.com asks for nothing beyond the download.

屈折度数 ORT.com ships an update every 39 months, 音読・読み上げ音声作成 every 2 weeks. Both last shipped on October 17, 2026.

## The numbers

| Metric | 屈折度数 ORT.com | 音読・読み上げ音声作成 |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/id1571586737/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | **100.0% of reviews** | 83.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 39 months | **Every 2 weeks** |
| Monetization | Paid | — |
| Size | 0 MB | 76 MB |
| Requires iOS | 26.0 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [kohei yamane](https://appshunter.io/developer/1239055575) | [hidehiko aihara](https://appshunter.io/developer/1178520609) |

## What reviewers say

### 屈折度数 ORT.com

[App page](https://appshunter.io/ios/app/ortcom/id1400812675)

This app visualizes refractive errors, from power cross to image formation diagrams. It instantly calculates and displays the main and weak axes of astigmatism, simulates image formation on the retina, and helps distinguish between different types of astigmatism. Ideal for students and professionals in vision training.

**Highlights:** Instant calculation of main and weak astigmatism axes, Visual power cross display, Image formation diagram simulation, Distinguishes astigmatism types, Simple and speedy operation, Ideal for vision training students and professionals

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

**In-app purchases:** none


### 音読・読み上げ音声作成

[App page](https://appshunter.io/ios/app/id1571586737)

**Features:** Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Coffee (Regular) | $0.49 | one-time |
| アプリケーション開発者への応援募金 | $1.99 | one-time |
| Coffee (Large) | $1.99 | one-time |
| Cake Set | $5.99 | one-time |


## Frequently asked questions

### Is 屈折度数 ORT.com free?

屈折度数 ORT.com costs $0.99, with no in-app purchases.

### Is 音読・読み上げ音声作成 free?

音読・読み上げ音声作成 is free to download, with in-app purchases available.

### Do 屈折度数 ORT.com or 音読・読み上げ音声作成 have ads?

音読・読み上げ音声作成 shows ads; 屈折度数 ORT.com does not.

### Which is updated more often, 屈折度数 ORT.com or 音読・読み上げ音声作成?

屈折度数 ORT.com ships an update every 39 months, and 音読・読み上げ音声作成 every 2 weeks. Most recently, 屈折度数 ORT.com was updated on October 17, 2026 and 音読・読み上げ音声作成 on October 17, 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.*