# 屈折度数 ORT.com vs DmgCalc CH

The clearest difference is price: DmgCalc CH at Free against 屈折度数 ORT.com's $0.99. DmgCalc CH also leads on update cadence (every 4 days vs every 39 months) and iOS requirement (15.1 vs 26.0). 屈折度数 ORT.com's advantage is in-app purchases (none vs 1) and ads (none vs shown). On device support there is nothing between them.

DmgCalc CH is free to download; 屈折度数 ORT.com costs $0.99 up front. DmgCalc CH sells 1 one-off in-app purchase. 屈折度数 ORT.com asks for nothing beyond the download.

屈折度数 ORT.com ships an update every 39 months, DmgCalc CH every 4 days. The most recent releases landed on October 1, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | 屈折度数 ORT.com | DmgCalc CH |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | — | **[4.0 (1 ratings)](https://appshunter.io/ios/app/dmgcalc-ch/id6762085550/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | **100.0% of reviews** | 90.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 39 months | **Every 4 days** |
| Monetization | Paid | **Free** |
| Size | 0 MB | 59 MB |
| Requires iOS | 26.0 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [kohei yamane](https://appshunter.io/developer/1239055575) | [Hoshino Hiroki](https://appshunter.io/developer/1730715474) |

## 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


### DmgCalc CH

[App page](https://appshunter.io/ios/app/dmgcalc-ch/id6762085550)

This tool calculates Pokémon battle damage and KO chances in real-time. It supports various battle mechanics, including Mega Evolutions and status effects, and allows users to save their Pokémon builds for quick access during matches. The app is designed for speed and offline use.

**Highlights:** Real-time damage calculation, KO chance estimation, Mega Evolution support, Status effect damage, Save Pokémon builds, Offline functionality

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | 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 DmgCalc CH free?

DmgCalc CH is free to download, with in-app purchases available.

### Do 屈折度数 ORT.com or DmgCalc CH have ads?

DmgCalc CH shows ads; 屈折度数 ORT.com does not.

### Which is updated more often, 屈折度数 ORT.com or DmgCalc CH?

屈折度数 ORT.com ships an update every 39 months, and DmgCalc CH every 4 days. Most recently, 屈折度数 ORT.com was updated on October 1, 2026 and DmgCalc CH on October 8, 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.*