# Missing Number Calculator vs いろいろメモ＋

The clearest difference is price: いろいろメモ＋ at Free against Missing Number Calculator's $0.99. Missing Number Calculator's advantage is ads (none vs shown) and update cadence (every 3 days vs weekly). On in-app purchases, device support and iOS requirement there is nothing between them.

いろいろメモ＋ is free to download; Missing Number Calculator costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Missing Number Calculator ships an update every 3 days, いろいろメモ＋ weekly. The most recent releases landed on October 13, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Missing Number Calculator | いろいろメモ＋ |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 3 days** | Weekly |
| Size | 6 MB | 6 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Infinity Inc. (Apps)](https://appshunter.io/developer/1680741877) | [TATSUYA HIRONAKA](https://appshunter.io/developer/1875830523) |

## What reviewers say

### Missing Number Calculator

[App page](https://appshunter.io/ios/app/missing-number-calculator/id6747973776)

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

**In-app purchases:** none


### いろいろメモ＋

[App page](https://appshunter.io/ios/app/id6798719036)

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

**In-app purchases:** none


## Frequently asked questions

### Is Missing Number Calculator free?

Missing Number Calculator costs $0.99, with no in-app purchases.

### Is いろいろメモ＋ free?

いろいろメモ＋ is free to download, with no in-app purchases.

### Do Missing Number Calculator or いろいろメモ＋ have ads?

いろいろメモ＋ shows ads; Missing Number Calculator does not.

### Which is updated more often, Missing Number Calculator or いろいろメモ＋?

Missing Number Calculator ships an update every 3 days, and いろいろメモ＋ weekly. Most recently, Missing Number Calculator was updated on October 13, 2026 and いろいろメモ＋ on October 25, 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.*