# ATID Reader vs Numeric Correction Calculator

The clearest difference is ads: ATID Reader at none against Numeric Correction Calculator's shown. ATID Reader also leads on iOS requirement (10.3 vs 15.4). Numeric Correction Calculator's advantage is update cadence (fortnightly vs every 7 months). 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.

ATID Reader ships an update every 7 months, Numeric Correction Calculator fortnightly. The most recent releases landed on October 13, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | ATID Reader | Numeric Correction Calculator |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 7 months | **Fortnightly** |
| Size | 3 MB | 9 MB |
| Requires iOS | **10.3** | 15.4 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ATID Co., Ltd.](https://appshunter.io/developer/1035212333) | [Nobuyuki Kumakura](https://appshunter.io/developer/1529070760) |

## What reviewers say

### ATID Reader

[App page](https://appshunter.io/ios/app/atid-reader/id1370269627)

**Features:** macOS Compatibility

**In-app purchases:** none


### Numeric Correction Calculator

[App page](https://appshunter.io/ios/app/numeric-correction-calculator/id6449193336)

**In-app purchases:** none


## Frequently asked questions

### Is ATID Reader free?

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

### Is Numeric Correction Calculator free?

Numeric Correction Calculator is free to download, with no in-app purchases.

### Do ATID Reader or Numeric Correction Calculator have ads?

Numeric Correction Calculator shows ads; ATID Reader does not.

### Which is updated more often, ATID Reader or Numeric Correction Calculator?

ATID Reader ships an update every 7 months, and Numeric Correction Calculator fortnightly. Most recently, ATID Reader was updated on October 13, 2026 and Numeric Correction Calculator on October 9, 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.*