# Fun and practical knowledge vs Viis

The clearest difference is in-app purchases: Viis at none against Fun and practical knowledge's 1. Fun and practical knowledge's advantage is update cadence (every 10 days vs every 5 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Fun and practical knowledge sells 1 one-off in-app purchase. Viis asks for nothing beyond the download.

Fun and practical knowledge ships an update every 10 days, Viis every 5 weeks. The most recent releases landed on September 17, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | Fun and practical knowledge | Viis |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 5 weeks |
| Size | 200 MB | 86 MB |
| Requires iOS | 14.0 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Man Hung Sun](https://appshunter.io/developer/1471605573) | [Thong Ho](https://appshunter.io/developer/1631859461) |

## What reviewers say

### Fun and practical knowledge

[App page](https://appshunter.io/ios/app/fun-and-practical-knowledge/id1619591485)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Upgrade | $0.99 | one-time |


### Viis

[App page](https://appshunter.io/ios/app/viis/id1631859459)

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

**In-app purchases:** none


## Frequently asked questions

### Is Fun and practical knowledge free?

Fun and practical knowledge is free to download, with in-app purchases available.

### Is Viis free?

Viis is free to download, with no in-app purchases.

### Do Fun and practical knowledge or Viis have ads?

Neither Fun and practical knowledge nor Viis shows ads.

### Which is updated more often, Fun and practical knowledge or Viis?

Fun and practical knowledge ships an update every 10 days, and Viis every 5 weeks. Most recently, Fun and practical knowledge was updated on September 17, 2026 and Viis on September 13, 2026.

---

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