# Knock in Doors vs Pull Pins Riddle

The clearest difference is in-app purchases: Pull Pins Riddle at none against Knock in Doors's 1. Knock in Doors's advantage is ads (none vs shown) and iOS requirement (9.0 vs 15.0). On price and device support there is nothing between them.

Both are free to download. Knock in Doors sells 1 one-off in-app purchase. Pull Pins Riddle asks for nothing beyond the download.

## The numbers

| Metric | Knock in Doors | Pull Pins Riddle |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | — | Every 9 months |
| Size | 63 MB | 23 MB |
| Requires iOS | **9.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Mikhail Dryaev](https://appshunter.io/developer/1449843804) | [famobi](https://appshunter.io/developer/933760663) |

## What reviewers say

### Knock in Doors

[App page](https://appshunter.io/ios/app/knock-in-doors/id1449843805)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |


### Pull Pins Riddle

[App page](https://appshunter.io/ios/app/pull-pins-riddle/id6738688081)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Knock in Doors free?

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

### Is Pull Pins Riddle free?

Pull Pins Riddle is free to download, with no in-app purchases.

### Do Knock in Doors or Pull Pins Riddle have ads?

Pull Pins Riddle shows ads; Knock in Doors does not.

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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.*