# AI先生　第三種電気主任技術者 vs Electro Math

The clearest difference is in-app purchases: AI先生　第三種電気主任技術者 at none against Electro Math's 1. Electro Math's advantage is ads (none vs shown) and update cadence (daily vs every 6 weeks). On price and device support there is nothing between them.

Both are free to download. Electro Math sells 1 in-app purchase, starting at $2.99 per month. AI先生　第三種電気主任技術者 asks for nothing beyond the download.

AI先生　第三種電気主任技術者 ships an update every 6 weeks, Electro Math daily. The most recent releases landed on September 14, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | AI先生　第三種電気主任技術者 | Electro Math |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 6 weeks | **Daily** |
| Size | 8 MB | 44 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [reiko hori](https://appshunter.io/developer/1777370692) | [ASUKA MINAMOTO](https://appshunter.io/developer/1855336606) |

## What reviewers say

### AI先生　第三種電気主任技術者

[App page](https://appshunter.io/ios/app/ai/id6738354877)

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

**In-app purchases:** none


### Electro Math

[App page](https://appshunter.io/ios/app/electro-math/id6755659770)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| サブスクリプション（定期購読） | $2.99 | per month |


## Frequently asked questions

### Is AI先生　第三種電気主任技術者 free?

AI先生　第三種電気主任技術者 is free to download, with no in-app purchases.

### Is Electro Math free?

Electro Math is free to download, with in-app purchases available.

### Do AI先生　第三種電気主任技術者 or Electro Math have ads?

AI先生　第三種電気主任技術者 shows ads; Electro Math does not.

### Which is updated more often, AI先生　第三種電気主任技術者 or Electro Math?

AI先生　第三種電気主任技術者 ships an update every 6 weeks, and Electro Math daily. Most recently, AI先生　第三種電気主任技術者 was updated on September 14, 2026 and Electro Math on September 17, 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.*