# はじめのAI vs Missing Number Calculator

The clearest difference is price: はじめのAI at Free against Missing Number Calculator's $0.99. はじめのAI also leads on iOS requirement (12.0 vs 17.0). Missing Number Calculator's advantage is update cadence (every 3 days vs every 4 months). On ads, in-app purchases and device support there is nothing between them.

はじめのAI 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.

はじめのAI ships an update every 4 months, Missing Number Calculator every 3 days. The most recent releases landed on October 4, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | はじめのAI | Missing Number Calculator |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 days** |
| Size | 49 MB | 6 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Teppei Yamazaki](https://appshunter.io/developer/1581267812) | [Infinity Inc. (Apps)](https://appshunter.io/developer/1680741877) |

## What reviewers say

### はじめのAI

[App page](https://appshunter.io/ios/app/ai/id6740161219)

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

**In-app purchases:** none


### Missing Number Calculator

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

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

**In-app purchases:** none


## Frequently asked questions

### Is はじめのAI free?

はじめのAI is free to download, with no in-app purchases.

### Is Missing Number Calculator free?

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

### Do はじめのAI or Missing Number Calculator have ads?

Neither はじめのAI nor Missing Number Calculator shows ads.

### Which is updated more often, はじめのAI or Missing Number Calculator?

はじめのAI ships an update every 4 months, and Missing Number Calculator every 3 days. Most recently, はじめのAI was updated on October 4, 2026 and Missing Number Calculator on October 13, 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.*