# Star Gems vs STEMadium

The clearest difference is rating: STEMadium at 5.0 against Star Gems's 4.2. STEMadium also leads on ads (none vs shown). Star Gems's advantage is in-app purchases (none vs 1) and update cadence (every 4 months vs every 27 months). On price and device support there is nothing between them.

Both are free to download. STEMadium sells 1 one-off in-app purchase. Star Gems asks for nothing beyond the download.

STEMadium holds the better App Store score, 5.0 against 4.2. That said, the two scores are not equally well evidenced: Star Gems has 78 ratings behind it against 1, so its average is the more settled of the two.

Star Gems ships an update every 4 months, STEMadium every 27 months. The most recent releases landed on October 15, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | Star Gems | STEMadium |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.2 (78 ratings)](https://appshunter.io/ios/app/star-gems/id528857133/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/stemadium/id1579244448/reviews)** |
| Number of ratings | **78** | 1 |
| Positive reviews | 86.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 4 months** | Every 27 months |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 102 MB | 911 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Balloon Island Limited](https://appshunter.io/developer/630026063) | [dfusion, Inc](https://appshunter.io/developer/1532980185) |

## What reviewers say

### Star Gems

[App page](https://appshunter.io/ios/app/star-gems/id528857133)

Engage in a fast-paced, strategic puzzle game where you blast aliens by matching colored stars. Avoid letting stars or UFOs reach the top of the screen. Utilize a charged laser gun for emergencies and enjoy playing with your own music.

**Highlights:** Match three or more stars of the same color, Destroy UFOs by popping stars below them, Prevent stars and UFOs from reaching the top, Use a charged laser gun for emergencies, Play with your own music, Autosave game progress

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 🚀 Fast and fun
- 👍 Addictive and absorbing
- 👍 Great for hand-eye coordination
- 👍 Enjoyable and challenging
- 👍 Simple but exciting

**What reviewers complain about**

- 🐛 Glitches and bugs
- 🐛 Freezing and crashing issues
- 🐛 Unresponsive touch screen
- 🔋 High battery consumption
- 👎 Too many ads and interruptions

**Reported bugs**

- Blocks from previous levels remain on board
- Game freezes or stops completely after updates
- Colors change automatically during gameplay
- Cubes float on top and cannot be eliminated
- Touch screen not responsive on first tap

**Requested features**

- Allow continuing from last level
- Add difficulty settings or level selection
- Improve laser gun recharging mechanics
- Fix issue with blocks from previous levels
- Optimize performance and stability


### STEMadium

[App page](https://appshunter.io/ios/app/stemadium/id1579244448)

Save a baseball stadium by defeating suits in a game. Improve player stats using STEM concepts through engaging baseball activities and a voiced narrative. Explore the stadium, customize your character, and unlock attractions with unique stories and challenges.

**Highlights:** STEM educational concepts in baseball, Content for 4th-6th graders, Player and bat customization, Voiced narrative with character stories, 8 STEM modules with lessons and challenges, Stadium exploration and attraction unlocking

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Full Game | $4.99 | one-time |


## Frequently asked questions

### Is Star Gems free?

Star Gems is free to download, with no in-app purchases.

### Is STEMadium free?

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

### Which has better reviews, Star Gems or STEMadium?

STEMadium is rated higher. Star Gems averages 4.2 out of 5 from 78 ratings, while STEMadium averages 5.0 from 1 ratings.

### Do Star Gems or STEMadium have ads?

Star Gems shows ads; STEMadium does not.

### Which is updated more often, Star Gems or STEMadium?

Star Gems ships an update every 4 months, and STEMadium every 27 months. Most recently, Star Gems was updated on October 15, 2026 and STEMadium on September 26, 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.*