# World Quiz + vs Keep The Fly

World Quiz + and Keep The Fly are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

## The numbers

| Metric | World Quiz + | Keep The Fly |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Size | 21 MB | 36 MB |
| Requires iOS | 13.4 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Leonardo Gonzalez Salas](https://appshunter.io/developer/1661846380) | [Stratton Apps SL](https://appshunter.io/developer/1483140675) |

## What reviewers say

### World Quiz +

[App page](https://appshunter.io/ios/app/world-quiz-plus/id6737612522)

**Features:** macOS Compatibility

**In-app purchases:** none


### Keep The Fly

[App page](https://appshunter.io/ios/app/keep-the-fly/id6788649714)

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

**In-app purchases:** none


## Frequently asked questions

### Is World Quiz + free?

World Quiz + is free to download, with no in-app purchases.

### Is Keep The Fly free?

Keep The Fly is free to download, with no in-app purchases.

### Do World Quiz + or Keep The Fly have ads?

Both World Quiz + and Keep The Fly show ads.

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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.*