# Base Expansion vs Polygon Defense

The clearest difference is in-app purchases: Base Expansion at none against Polygon Defense's 5. Base Expansion also leads on ads (none vs shown) and iOS requirement (13.0 vs 18.0). Polygon Defense's advantage is update cadence (every 2 days vs every 3 weeks). On price and device support there is nothing between them.

Both are free to download. Polygon Defense sells 5 one-off in-app purchases. Base Expansion asks for nothing beyond the download.

Base Expansion ships an update every 3 weeks, Polygon Defense every 2 days. The most recent releases landed on November 8, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Base Expansion | Polygon Defense |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | **Every 2 days** |
| Size | 177 MB | 91 MB |
| Requires iOS | **13.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Alexandr Gavrilov](https://appshunter.io/developer/1684525615) | [Robert Sittig](https://appshunter.io/developer/1711088968) |

## What reviewers say

### Base Expansion

[App page](https://appshunter.io/ios/app/base-expansion/id6743320066)

**Features:** macOS Compatibility

**In-app purchases:** none


### Polygon Defense

[App page](https://appshunter.io/ios/app/polygon-defense-idle-td/id6788293124)

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Handful of Gems | $0.99 | one-time |
| Bag of Gems | $2.99 | one-time |
| Crate of Gems | $4.99 | one-time |
| No Ads | $4.99 | one-time |
| Vault of Gems | $11.99 | one-time |


## Frequently asked questions

### Is Base Expansion free?

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

### Is Polygon Defense free?

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

### Do Base Expansion or Polygon Defense have ads?

Polygon Defense shows ads; Base Expansion does not.

### Which is updated more often, Base Expansion or Polygon Defense?

Base Expansion ships an update every 3 weeks, and Polygon Defense every 2 days. Most recently, Base Expansion was updated on November 8, 2026 and Polygon Defense on October 28, 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.*