# HARM Invaders vs OpenLock

The clearest difference is in-app purchases: OpenLock at none against HARM Invaders's 4. OpenLock also leads on update cadence (every 8 months vs every 34 months). HARM Invaders's advantage is iOS requirement (8.0 vs 13.0). On price, ads and device support there is nothing between them.

Both are free to download. HARM Invaders sells 4 one-off in-app purchases. OpenLock asks for nothing beyond the download.

HARM Invaders ships an update every 34 months, OpenLock every 8 months. The most recent releases landed on November 1, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | HARM Invaders | OpenLock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/harm-invaders/id966535230/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 34 months | **Every 8 months** |
| Monetization | Free with in-app purchases | — |
| Size | 158 MB | 78 MB |
| Requires iOS | **8.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [QED Gaming PTY. Ltd](https://appshunter.io/developer/441029909) | [Kıyan SISAKHTI](https://appshunter.io/developer/1704015191) |

## What reviewers say

### 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 |


### OpenLock

[App page](https://appshunter.io/ios/app/openlock-infinity/id6474688652)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is HARM Invaders free?

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

### Is OpenLock free?

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

### Do HARM Invaders or OpenLock have ads?

Neither HARM Invaders nor OpenLock shows ads.

### Which is updated more often, HARM Invaders or OpenLock?

HARM Invaders ships an update every 34 months, and OpenLock every 8 months. Most recently, HARM Invaders was updated on November 1, 2026 and OpenLock on November 4, 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.*