# Put'EmIn vs Alien Defense

The clearest difference is update cadence: Alien Defense at fortnightly against Put'EmIn's every 10 months. Put'EmIn's advantage is iOS requirement (13.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Put'EmIn sells 1 one-off in-app purchase and Alien Defense sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Put'EmIn ships an update every 10 months, Alien Defense fortnightly. The most recent releases landed on October 26, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Put'EmIn | Alien Defense |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 10 months | **Fortnightly** |
| Size | 202 MB | 284 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 9+ |
| Developer | [Sandor Tasnadi](https://appshunter.io/developer/1102198629) | [PLAYGENIX EDTECH INC.](https://appshunter.io/developer/6784856448) |

## What reviewers say

### Put'EmIn

[App page](https://appshunter.io/ios/app/putemin/id1484873029)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock all levels | $2.99 | one-time |


### Alien Defense

[App page](https://appshunter.io/ios/app/alien-defense-space-tower-rts/id6776451528)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 500 Gas | $0.99 | one-time |
| 4,000 Gas | $4.99 | one-time |
| 20,000 Gas | $19.99 | one-time |


## Frequently asked questions

### Is Put'EmIn free?

Put'EmIn is free to download, with in-app purchases available.

### Is Alien Defense free?

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

### Do Put'EmIn or Alien Defense have ads?

Both Put'EmIn and Alien Defense show ads.

### Which is updated more often, Put'EmIn or Alien Defense?

Put'EmIn ships an update every 10 months, and Alien Defense fortnightly. Most recently, Put'EmIn was updated on October 26, 2026 and Alien Defense on November 5, 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.*