# QI Challenge vs NIS

The clearest difference is update cadence: QI Challenge at every 3 weeks against NIS's every 2 months. QI Challenge also leads on iOS requirement (12.1 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

QI Challenge ships an update every 3 weeks, NIS every 2 months. The most recent releases landed on October 23, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | QI Challenge | NIS |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Size | 47 MB | 39 MB |
| Requires iOS | **12.1** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Agility Global Solutions](https://appshunter.io/developer/1641453688) | [Parrophins Private Limited](https://appshunter.io/developer/1628483556) |

## What reviewers say

### QI Challenge

[App page](https://appshunter.io/ios/app/qi-challenge/id1528766166)

**Features:** macOS Compatibility

**In-app purchases:** none


### NIS

[App page](https://appshunter.io/ios/app/nis/id1630907867)

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

**In-app purchases:** none


## Frequently asked questions

### Is QI Challenge free?

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

### Is NIS free?

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

### Do QI Challenge or NIS have ads?

Neither QI Challenge nor NIS shows ads.

### Which is updated more often, QI Challenge or NIS?

QI Challenge ships an update every 3 weeks, and NIS every 2 months. Most recently, QI Challenge was updated on October 23, 2026 and NIS on October 9, 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.*