# Missing Number Calculator vs ぺたっとメモ

The clearest difference is price: ぺたっとメモ at Free against Missing Number Calculator's $0.99. ぺたっとメモ also leads on update cadence (daily vs every 3 days) and iOS requirement (15.1 vs 17.0). On ads, in-app purchases and device support there is nothing between them.

ぺたっとメモ 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, ぺたっとメモ daily. The most recent releases landed on October 13, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Missing Number Calculator | ぺたっとメモ |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 days | **Daily** |
| Size | 6 MB | 79 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Infinity Inc. (Apps)](https://appshunter.io/developer/1680741877) | [MARIE MORIKAGE](https://appshunter.io/developer/1896645636) |

## 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


### ぺたっとメモ

[App page](https://appshunter.io/ios/app/id6771320241)

**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 ぺたっとメモ free?

ぺたっとメモ is free to download, with no in-app purchases.

### Do Missing Number Calculator or ぺたっとメモ have ads?

Neither Missing Number Calculator nor ぺたっとメモ shows ads.

### Which is updated more often, Missing Number Calculator or ぺたっとメモ?

Missing Number Calculator ships an update every 3 days, and ぺたっとメモ daily. Most recently, Missing Number Calculator was updated on October 13, 2026 and ぺたっとメモ on October 6, 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.*