# Jupiter Attack vs Gem Tower Defense Mobile

The clearest difference is review sentiment: Gem Tower Defense Mobile at 100% against Jupiter Attack's 40%. Gem Tower Defense Mobile also leads on update cadence (weekly vs every 2 months). Jupiter Attack's advantage is rating (4.5 vs 3.0) and ratings volume (393 vs 2). On ads and in-app purchases there is nothing between them.

Jupiter Attack costs $1.99 and Gem Tower Defense Mobile $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Jupiter Attack holds the better App Store score, 4.5 against 3.0. That said, the two scores are not equally well evidenced: Jupiter Attack has 393 ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 40% of Jupiter Attack's written reviews are positive against 100% of Gem Tower Defense Mobile's, so the app with the better star average is not the one people write more warmly about.

Jupiter Attack ships an update every 2 months, Gem Tower Defense Mobile weekly. Both last shipped on November 13, 2026.

## The numbers

| Metric | Jupiter Attack | Gem Tower Defense Mobile |
| --- | --- | --- |
| Price | **$1.99** | $2.99 |
| Rating | **[4.5 (393 ratings)](https://appshunter.io/ios/app/jupiter-attack/id1475755775/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/gem-tower-defense-mobile/id6760966893/reviews) |
| Number of ratings | **393** | 2 |
| Positive reviews | 40.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | **Free** | Paid |
| Best chart rank | **#20** | — |
| Size | 18 MB | 12 MB |
| Requires iOS | **12.1** | 26.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Red Sprite Studios](https://appshunter.io/developer/493770851) | [Jameson DeVol](https://appshunter.io/developer/1884766479) |

## What reviewers say

### Jupiter Attack

[App page](https://appshunter.io/ios/app/jupiter-attack/id1475755775)

**Currently charting:** #20 Top Paid · Casual, #65 Top Paid · Action (US App Store)

Engage in intense arcade-style space combat against relentless alien invaders. Navigate your ship using intuitive controls on Apple Watch and iPhone, collect power-ups, and aim for the highest score on the global leaderboard. Relive classic arcade action with retro visuals and sound.

**Highlights:** Bullet hell arcade action, Apple Watch and iOS compatibility, Power-up collection (multi-shot, shield, rapid fire), High-score leaderboard, Intuitive Digital Crown controls on Apple Watch, Swipe controls on iPhone, Retro sound effects

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


### Gem Tower Defense Mobile

[App page](https://appshunter.io/ios/app/gem-tower-defense-mobile/id6760966893)

Strategically place and combine gems to build mazes and towers, defending against waves of enemies. Each playthrough offers a unique puzzle with diverse gem abilities and enemy types.

**Highlights:** Build winding mazes and towers, Draft, reroll, and combine gems, Follow templates for advanced combinations, Discover gems with distinct stats, Defend against different enemy types, Survive 50 challenging waves, Retro pixel art graphics

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

**In-app purchases:** none


## Frequently asked questions

### Is Jupiter Attack free?

Jupiter Attack costs $1.99, with no in-app purchases.

### Is Gem Tower Defense Mobile free?

Gem Tower Defense Mobile costs $2.99, with no in-app purchases.

### Which has better reviews, Jupiter Attack or Gem Tower Defense Mobile?

Jupiter Attack is rated higher. Jupiter Attack averages 4.5 out of 5 from 393 ratings, while Gem Tower Defense Mobile averages 3.0 from 2 ratings.

### Do Jupiter Attack or Gem Tower Defense Mobile have ads?

Neither Jupiter Attack nor Gem Tower Defense Mobile shows ads.

### Which is updated more often, Jupiter Attack or Gem Tower Defense Mobile?

Jupiter Attack ships an update every 2 months, and Gem Tower Defense Mobile weekly. Most recently, Jupiter Attack was updated on November 13, 2026 and Gem Tower Defense Mobile on November 13, 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.*