# Rebound Invaders vs "21 With Dice"

The clearest difference is ads: "21 With Dice" at none against Rebound Invaders's shown. "21 With Dice" also leads on update cadence (every 3 weeks vs every 18 months). Rebound Invaders's advantage is iOS requirement (13.0 vs 17.6). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Rebound Invaders ships an update every 18 months, "21 With Dice" every 3 weeks. The most recent releases landed on November 1, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Rebound Invaders | "21 With Dice" |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 18 months | **Every 3 weeks** |
| Monetization | Ad-supported | — |
| Size | 46 MB | 5 MB |
| Requires iOS | **13.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | +9 | 4+ |
| Developer | [Galatic Droids](https://appshunter.io/developer/806182439) | [Thomas Timberlake](https://appshunter.io/developer/1896716090) |

## What reviewers say

### Rebound Invaders

[App page](https://appshunter.io/ios/app/rebound-invaders/id896339002)

Experience a retro arcade space shooter where your plasma ball bounces off walls and enemies. Dodge your own ricocheting projectiles and alien counter-attacks to survive. Features tilt or on-screen controls for classic shoot'em up action.

**Highlights:** Bouncing plasma ball weapon, Ricocheting projectiles, Alien force field defense, Tilt or on-screen controls, Fast-paced arcade action, Retro graphics

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

**In-app purchases:** none


### "21 With Dice"

[App page](https://appshunter.io/ios/app/21-with-dice/id6778107288)

**In-app purchases:** none


## Frequently asked questions

### Is Rebound Invaders free?

Rebound Invaders is free to download, with no in-app purchases.

### Is "21 With Dice" free?

"21 With Dice" is free to download, with no in-app purchases.

### Do Rebound Invaders or "21 With Dice" have ads?

Rebound Invaders shows ads; "21 With Dice" does not.

### Which is updated more often, Rebound Invaders or "21 With Dice"?

Rebound Invaders ships an update every 18 months, and "21 With Dice" every 3 weeks. Most recently, Rebound Invaders was updated on November 1, 2026 and "21 With Dice" on October 31, 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.*