1D Arcade vs HARM Invaders
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
1D Arcade
Engage in a minimalist, one-dimensional action game where you control a paddle. Your goal is to hit beneficial green objects and avoid harmful red ones before they cross the centerline. An interactive tutorial guides you through the mechanics.
- One-dimensional gameplay
- Paddle control
- Hit green, avoid red
- Interactive tutorial
- Immersive audio experience
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One-dimensional-space action game. * You're the paddle in the middle. * ~Green things are good. * ~Red things are bad. * Hit the green and avoid the red... * ...before they have passed the centerline. Go through the interactive tutorial to learn and test all detalis! ---------------------------------------- Put on your headphones and turn out the light, let's play 1D arcade. Enjoy! ---------------------------------------- Disclaimer: If you delete the app-data or uninstall the app, you will loose possible purchased coins. So keep that in mind, just saying!
HARM Invaders
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.
- Real-time 3D graphics
- Diverse enemy types
- Dozens of weapons
- Space ship 3D combat
- Local & Global high-score tables
- Rank system
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The year is 2115 and an artificial repeating radio signal has been detected coming from the vicinity of Mars. You as commander of Earth's first and only Space Fighter are sent to investigate. On Arrival at Mars a huge electrical vortex is detected in orbit, from which spews a ‘Hungry Alien Replicating Machine’. The Alien Machines consume minerals from rocks to replicate. Commander, you must destroy the ‘HARM’ before they can reach Earth. Push them back out of our Solar System at all costs. Battle a relentless enemy that won’t stop until the Earth is consumed, in this fast paced action 3D shoot-em-up. Features of HARM Invaders:- * Real time 3d graphics, Using METAL on compatible devices * Many different types or replicating enemy * Dozens of weapons to research and use * Pause button for when the heat gets too hot. * Play across the entire Solar System * Space Ship 3D combat * Particle effects * Local & Global High-score table * Separate High-score table for your personal best * Rank system, rise to the rank of Grand Admiral of the Space fleet. * Works best on ipad2+ (Recommend iPad Air+) * Compatible with MFi Mad Catz Controller plus all iCade type controllers.
Screenshots
Verdict
The clearest difference is review sentiment: 1D Arcade at 50% against HARM Invaders's 0%. 1D Arcade also leads on rating (5.0 vs 3.0) and update cadence (every 9 months vs every 34 months). HARM Invaders's advantage is ads (none vs shown) and iOS requirement (8.0 vs 12). On price, ratings volume, in-app purchases and monetization model there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. 1D Arcade 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.
1D Arcade holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 3 and 2 respectively. Written reviews point the same way: 50% of 1D Arcade's written reviews are positive against 0% of HARM Invaders's.
1D Arcade ships an update every 9 months, HARM Invaders every 34 months. The most recent releases landed on September 27, 2026 and October 2, 2026 respectively.
| Parameter | 1D Arcade | HARM Invaders |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (3 ratings) — better | 3.0 (2 ratings) |
| Positive reviews | 50.0% of reviews — better | 0.0% of reviews |
| Number of ratings | 3 — better | 2 |
| Update frequency | Every 9 months — better | Every 34 months |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12 | 8.0 — better |
| Further details — not scored | ||
| Size | 55 MB | 158 MB |
| Age rating | 4+ | 4+ |
| Developer | Svante Segelson | QED Gaming PTY. Ltd |
Customer experience
1D Arcade
HARM Invaders
In-app purchases
1D Arcade
- 20 Coins$0.99
- 60 Coins$1.99
- 60 New Coins$1.99
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- 100 Coins$2.99
- 100 New Coins$2.99
HARM Invaders
- 500 Research Machine Credits$0.99
- 500 Brain Power$1.99
- 2000 Brain Power$4.99
Show 1 moreShow fewer
- 10000 Research Machine Credits$9.99









