# Blue Defense vs Between Stars

The clearest difference is update cadence: Between Stars at every 10 days against Blue Defense's every 3 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Blue Defense sells 1 one-off in-app purchase and Between Stars sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Blue Defense ships an update every 3 months, Between Stars every 10 days. The most recent releases landed on November 1, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Blue Defense | Between Stars |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (20 ratings)](https://appshunter.io/ios/app/blue-defense-second-wave/id389817492/reviews)** | — |
| Number of ratings | **20** | — |
| Positive reviews | 81.6% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 10 days** |
| Monetization | Free with in-app purchases | — |
| Size | 16 MB | 181 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 9+ | 4+ |
| Developer | [Cat in a Box Software](https://appshunter.io/developer/1600179204) | [Fixed Point Solutions SRL](https://appshunter.io/developer/6789293212) |

## What reviewers say

### Blue Defense

[App page](https://appshunter.io/ios/app/blue-defense-second-wave/id389817492)

Defend your planet from alien invaders using a powerful cannon. Engage in intense arcade action with various game modes, leaderboards, and unlockable content. Enjoy updated retro graphics and flexible controls.

**Highlights:** Planet cannon for mass enemy destruction, Gauntlet mode to win the game, Infinite-Classic and Infinite-Quickstart modes, Level select with medal earning, 74 global leaderboards, Automatic save state, Multi-touch and tilt controls

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Content | $1.99 | one-time |


### Between Stars

[App page](https://appshunter.io/ios/app/between-stars-gravity-puzzle/id6789293210)

**Features:** Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Deep Gravity + Aurora | $2.99 | one-time |


## Frequently asked questions

### Is Blue Defense free?

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

### Is Between Stars free?

Between Stars is free to download, with in-app purchases available.

### Do Blue Defense or Between Stars have ads?

Neither Blue Defense nor Between Stars shows ads.

### Which is updated more often, Blue Defense or Between Stars?

Blue Defense ships an update every 3 months, and Between Stars every 10 days. Most recently, Blue Defense was updated on November 1, 2026 and Between Stars on November 5, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*