# Planet Defense vs Orbital Zero

The clearest difference is rating: Orbital Zero at 5.0 against Planet Defense's 4.6. Orbital Zero also leads on update cadence (every 3 days vs weekly). Planet Defense's advantage is ratings volume (2.9K vs 4) and chart position (#165 vs unranked). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Planet Defense sells 10 one-off in-app purchases and Orbital Zero sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Orbital Zero holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Planet Defense has 2.9K ratings behind it against 4, so its average is the more settled of the two.

Planet Defense ships an update weekly, Orbital Zero every 3 days. The most recent releases landed on November 8, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Planet Defense | Orbital Zero |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (2.9K ratings)](https://appshunter.io/ios/app/planet-defense-space-td-game/id6749851329/reviews) | **[5.0 (4 ratings)](https://appshunter.io/ios/app/orbital-zero/id6797280299/reviews)** |
| Number of ratings | **2.9K** | 4 |
| Positive reviews | 28.5% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Weekly | **Every 3 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Best chart rank | **#165** | — |
| Size | 646 MB | 19 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [CYBERJOY LIMITED](https://appshunter.io/developer/1602455961) | [Brusa](https://appshunter.io/developer/535811164) |

## What reviewers say

### Planet Defense

[App page](https://appshunter.io/ios/app/planet-defense-space-td-game/id6749851329)

**Currently charting:** #165 Top Grossing · Strategy, #193 Top Free · Strategy (US App Store)

Defend your home planet in this roguelike tower defense game. Build and upgrade defenses to fend off alien invaders with strategic gameplay and unique upgrades each playthrough. Master the art of survival in an epic cosmic battle.

**Highlights:** Roguelike progression with randomized upgrades, Strategic depth with unlockable sentinels, Immersive visuals and sound design, Easy to learn, hard to master gameplay, Endless replayability with procedural generation, Multiple difficulty modes

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| StarterPack_1 | $2.99 | one-time |
| LevelPack_1 | $4.99 | one-time |
| Normal Battlepass | $4.99 | one-time |
| Delux Monthly Card | $9.99 | one-time |
| 680 Diamond | $9.99 | one-time |
| StarterPack_2 | $9.99 | one-time |
| Journey Pass - Conqueror Pass | $9.99 | one-time |
| Medal Event Boost | $14.99 | one-time |
| 1400 Diamond | $19.99 | one-time |
| Delux LifeTime Card | $49.99 | one-time |

**What reviewers like**

- 👍 Enjoyable gameplay
- 🌟 Beautiful graphics

**What reviewers complain about**

- ⏱️ Slow progression and upgrades
- 🐛 Frequent crashes and freezes
- 💰 Heavily pay-to-play model
- 📺 Excessive ads interrupting gameplay

**Reported bugs**

- Inconsistent level completion rewards
- Weapons becoming weaker after upgrades

**Requested features**

- Faster progression and upgrades
- More free-to-play friendly monetization
- Improved stability and reduced crashes


### Orbital Zero

[App page](https://appshunter.io/ios/app/orbital-zero/id6797280299)

Control a gravity-powered saucer, tapping to navigate through space. Avoid obstacles, collect power-ups, and complete missions. Unlock new ships and customize your experience as the challenge increases.

**Highlights:** Gravity-powered saucer control, Tap-to-sling gameplay, Meteor avoidance, Crystal and bonus collection, Unlockable ships with abilities, Missions across space sectors, Progressive difficulty

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Crystal Pack 60 | $0.99 | one-time |
| Remove Ads | $1.99 | one-time |
| Crystal Pack 250 | $3.99 | one-time |
| Crystal Pack 700 | $8.99 | one-time |


## Frequently asked questions

### Is Planet Defense free?

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

### Is Orbital Zero free?

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

### Which has better reviews, Planet Defense or Orbital Zero?

Orbital Zero is rated higher. Planet Defense averages 4.6 out of 5 from 2.9K ratings, while Orbital Zero averages 5.0 from 4 ratings.

### Do Planet Defense or Orbital Zero have ads?

Both Planet Defense and Orbital Zero show ads.

### Which is updated more often, Planet Defense or Orbital Zero?

Planet Defense ships an update weekly, and Orbital Zero every 3 days. Most recently, Planet Defense was updated on November 8, 2026 and Orbital Zero on October 31, 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.*