# Barrel Defender vs Evolvace E2

The clearest difference is in-app purchases: Barrel Defender at none against Evolvace E2's 2. Barrel Defender also leads on price ($0.99 vs $4.99). Evolvace E2's advantage is update cadence (every 8 months vs every 39 months). On ads, device support and iOS requirement there is nothing between them.

Barrel Defender costs $0.99 and Evolvace E2 $4.99 up front. Evolvace E2 sells 2 one-off in-app purchases. Barrel Defender asks for nothing beyond the download.

Barrel Defender ships an update every 39 months, Evolvace E2 every 8 months. The most recent releases landed on October 31, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Barrel Defender | Evolvace E2 |
| --- | --- | --- |
| Price | **$0.99** | $4.99 |
| Rating | **[4.0 (1 ratings)](https://appshunter.io/ios/app/barrel-defender-galaxy/id321991078/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 39 months | **Every 8 months** |
| Monetization | Paid | — |
| Size | 33 MB | 87 MB |
| Requires iOS | 15.6 | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 9+ | 4+ |
| Developer | [Stefan Preuss](https://appshunter.io/developer/307563428) | [Tetsuyoshi Morikawa](https://appshunter.io/developer/430144969) |

## What reviewers say

### Barrel Defender

[App page](https://appshunter.io/ios/app/barrel-defender-galaxy/id321991078)

Defend your energy barrels from alien invaders in this retro arcade space shooter. Enjoy simple, intuitive controls and blast through waves of enemies with various weapons and challenging boss fights.

**Highlights:** Two game modes: endless and wave, 25 alien-filled waves, Variety of aliens and movement patterns, Boss enemy battles, Weapon power-ups, Easy finger-slide controls

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

**In-app purchases:** none


### Evolvace E2

[App page](https://appshunter.io/ios/app/evolvace-e2/id878635618)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Addition | $0.99 | one-time |
| Stage clear button | $0.99 | one-time |


## Frequently asked questions

### Is Barrel Defender free?

Barrel Defender costs $0.99, with no in-app purchases.

### Is Evolvace E2 free?

Evolvace E2 costs $4.99, and also offers in-app purchases.

### Do Barrel Defender or Evolvace E2 have ads?

Neither Barrel Defender nor Evolvace E2 shows ads.

### Which is updated more often, Barrel Defender or Evolvace E2?

Barrel Defender ships an update every 39 months, and Evolvace E2 every 8 months. Most recently, Barrel Defender was updated on October 31, 2026 and Evolvace E2 on October 24, 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.*