# Mars Quest vs HARM Invaders

The clearest difference is review sentiment: Mars Quest at 68% against HARM Invaders's 0%. Mars Quest also leads on rating (4.0 vs 3.0) and update cadence (fortnightly vs every 34 months). HARM Invaders's advantage is ads (none vs shown) and iOS requirement (8.0 vs 13.0). On price, in-app purchases, monetization model and device support there is nothing between them.

Both are free to download. Mars Quest sells 5 one-off in-app purchases and HARM Invaders sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Mars Quest holds the better App Store score, 4.0 against 3.0. That said, the two scores are not equally well evidenced: Mars Quest has 91 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 68% of Mars Quest's written reviews are positive against 0% of HARM Invaders's.

Mars Quest ships an update fortnightly, HARM Invaders every 34 months. The most recent releases landed on October 5, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Mars Quest | HARM Invaders |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (91 ratings)](https://appshunter.io/ios/app/mars-quest-8-bit/id491304485/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/harm-invaders/id966535230/reviews) |
| Number of ratings | **91** | 2 |
| Positive reviews | **68.5% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Fortnightly** | Every 34 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 98 MB | 158 MB |
| Requires iOS | 13.0 | **8.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [First Class Media B.V.](https://appshunter.io/developer/1394094946) | [QED Gaming PTY. Ltd](https://appshunter.io/developer/441029909) |

## What reviewers say

### Mars Quest

[App page](https://appshunter.io/ios/app/mars-quest-8-bit/id491304485)

Embark on a challenging retro adventure guiding an astronaut through alien-infested Martian levels. Experience nostalgic 8-bit graphics and music while avoiding obstacles and increasing speed. Compete with friends via Game Center.

**Highlights:** 8-bit retro music, Guide astronaut through levels, Avoid aliens and obstacles, Smart level progression, Increasing speed challenges, Game Center scores and achievements

**Features:** macOS Compatibility, Game Controller support

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove advertising | $0.99 | one-time |
| 1 extra life | $0.99 | one-time |
| 5 extra lives | $1.99 | one-time |
| 10 extra lives | $2.99 | one-time |
| 25 extra lives | $4.99 | one-time |


### HARM Invaders

[App page](https://appshunter.io/ios/app/harm-invaders/id966535230)

Command Earth's first space fighter to defend humanity from an alien threat originating from Mars. Engage in fast-paced 3D combat across the solar system, researching weapons and battling replicating alien machines.

**Highlights:** Real-time 3D graphics, Diverse enemy types, Dozens of weapons, Space ship 3D combat, Local & Global high-score tables, Rank system

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 500 Research Machine Credits | $0.99 | one-time |
| 500 Brain Power | $1.99 | one-time |
| 2000 Brain Power | $4.99 | one-time |
| 10000 Research Machine Credits | $9.99 | one-time |


## Frequently asked questions

### Is Mars Quest free?

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

### Is HARM Invaders free?

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

### Which has better reviews, Mars Quest or HARM Invaders?

Mars Quest is rated higher. Mars Quest averages 4.0 out of 5 from 91 ratings, while HARM Invaders averages 3.0 from 2 ratings.

### Do Mars Quest or HARM Invaders have ads?

Mars Quest shows ads; HARM Invaders does not.

### Which is updated more often, Mars Quest or HARM Invaders?

Mars Quest ships an update fortnightly, and HARM Invaders every 34 months. Most recently, Mars Quest was updated on October 5, 2026 and HARM Invaders on October 2, 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.*