# Wiki Quick Study｜アシストシステム vs WAIS

The clearest difference is in-app purchases: Wiki Quick Study｜アシストシステム at none against WAIS's 1. WAIS's advantage is device support. On price and iOS requirement there is nothing between them.

Both are free to download. WAIS sells 1 in-app purchase, starting at $2.99 per month. Wiki Quick Study｜アシストシステム asks for nothing beyond the download.

## The numbers

| Metric | Wiki Quick Study｜アシストシステム | WAIS |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | — | No |
| Update frequency | — | Every 8 days |
| Size | 25 MB | 10 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | — | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Tsuyoshi Hayakawa](https://appshunter.io/developer/314516929) | [Burning Tribe](https://appshunter.io/developer/1888072646) |

## What reviewers say

### Wiki Quick Study｜アシストシステム

[App page](https://appshunter.io/ios/app/wiki-quick-study/id6755429456)

**In-app purchases:** none


### WAIS

[App page](https://appshunter.io/ios/app/wais-4/id6763717128)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| WAIS4 プレミアム | $2.99 | per month |


## Frequently asked questions

### Is Wiki Quick Study｜アシストシステム free?

Wiki Quick Study｜アシストシステム is free to download, with no in-app purchases.

### Is WAIS free?

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

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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.*