# AI先生　第三種電気主任技術者 vs Kifu Vault

The clearest difference is price: AI先生　第三種電気主任技術者 at Free against Kifu Vault's $5.99. Kifu Vault's advantage is ads (none vs shown) and update cadence (daily vs every 6 weeks). On in-app purchases and device support there is nothing between them.

AI先生　第三種電気主任技術者 is free to download; Kifu Vault costs $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.

AI先生　第三種電気主任技術者 ships an update every 6 weeks, Kifu Vault daily. The most recent releases landed on October 25, 2026 and November 1, 2026 respectively.

## The numbers

| Metric | AI先生　第三種電気主任技術者 | Kifu Vault |
| --- | --- | --- |
| Price | **Free** | $5.99 |
| Positive reviews | — | 60.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 6 weeks | **Daily** |
| Monetization | — | Paid |
| Size | 8 MB | 6 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [reiko hori](https://appshunter.io/developer/1777370692) | [suzuki hajime](https://appshunter.io/developer/6795305454) |

## 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


### Kifu Vault

[App page](https://appshunter.io/ios/app/kifu-vault/id6795305452)

This app helps you store, search, and review your Shogi game records. It turns lessons into quizzes, tracks your progress, and allows for detailed game analysis and organization. All data is saved locally for privacy and offline access.

**Highlights:** Store and search Shogi game records, Turn lessons into 'next move' quizzes, Spaced repetition for quiz learning, Import existing game records, Detailed game analysis and annotation, Offline functionality, Printable game records

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

**In-app purchases:** none


## 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 Kifu Vault free?

Kifu Vault costs $5.99, with no in-app purchases.

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

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

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

AI先生　第三種電気主任技術者 ships an update every 6 weeks, and Kifu Vault daily. Most recently, AI先生　第三種電気主任技術者 was updated on October 25, 2026 and Kifu Vault on November 1, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*