# circloO vs Quantum Defender

The clearest difference is ads: Quantum Defender at none against circloO's shown. Quantum Defender also leads on update cadence (every 6 days vs every 2 months). circloO's advantage is ratings volume (2.4K vs 1) and iOS requirement (10 vs 15.0). On price, rating, in-app purchases and monetization model there is nothing between them.

Both are free to download. circloO sells 1 one-off in-app purchase and Quantum Defender sells 7 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Quantum Defender holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: circloO has 2.4K ratings behind it against 1, so its average is the more settled of the two.

circloO ships an update every 2 months, Quantum Defender every 6 days. The most recent releases landed on October 10, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | circloO | Quantum Defender |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (2.4K ratings)](https://appshunter.io/ios/app/circloo-physics-platformer/id1612957699/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/quantum-defender/id6774734122/reviews)** |
| Number of ratings | **2.4K** | 1 |
| Positive reviews | 89.5% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 6 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 63 MB | 124 MB |
| Requires iOS | **10** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Florian van Strien](https://appshunter.io/developer/1603079263) | [RQM Technologies LLC](https://appshunter.io/developer/6771489977) |

## What reviewers say

### circloO

[App page](https://appshunter.io/ios/app/circloo-physics-platformer/id1612957699)

A colorful physics platformer where you guide a ball through growing circular levels. Collect circles to expand the play area, strategically using and avoiding obstacles. Discover unique physics mechanics and enjoy a vast collection of player-created levels.

**Highlights:** Circular physics puzzles, Level editor, Player-created levels, Unique physics mechanics, Growing levels, Hard Mode levels

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $2.99 | one-time |

**What reviewers like**

- 👍 Relaxing and enjoyable gameplay
- 🎨 Creative and unique levels
- 🎶 Calming background music
- 🧠 Challenging but not impossible
- 🕹️ Smooth and responsive controls

**What reviewers complain about**

- 🔍 Occasional performance issues
- 🕹️ Difficulty can be inconsistent
- 📺 Ads can be disruptive at times
- 🤑 Lack of free content/levels

**Reported bugs**

- Glitches with level progression
- Inconsistent touch/click registration

**Requested features**

- More levels and content updates
- Character customization options
- Improved level editor tools
- Difficulty settings or options


### Quantum Defender

[App page](https://appshunter.io/ios/app/quantum-defender/id6774734122)

Defend a quantum core by controlling and aligning a wavefunction against waves of incoming enemies. This arcade action game transforms abstract quantum concepts into fast-paced, visual gameplay with simple touch controls and escalating challenges.

**Highlights:** Fast arcade defense gameplay, Wavefunction alignment mechanics, Quantum-inspired enemies and effects, Increasing enemy pressure, Designed for touch controls, Sci-fi wave-based game world

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Cadet Qubit Pack | $1.99 | one-time |
| Field Qubit Pack | $5.99 | one-time |
| Command Qubit Pack | $11.99 | one-time |
| Singularity Qubit Pack | $25.99 | one-time |
| Architect Qubit Pack | $49.99 | one-time |
| Navigator Qubit Pack | $99.99 | one-time |
| Horizon Qubit Pack | $199.99 | one-time |


## Frequently asked questions

### Is circloO free?

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

### Is Quantum Defender free?

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

### Which has better reviews, circloO or Quantum Defender?

Quantum Defender is rated higher. circloO averages 4.8 out of 5 from 2.4K ratings, while Quantum Defender averages 5.0 from 1 ratings.

### Do circloO or Quantum Defender have ads?

circloO shows ads; Quantum Defender does not.

### Which is updated more often, circloO or Quantum Defender?

circloO ships an update every 2 months, and Quantum Defender every 6 days. Most recently, circloO was updated on October 10, 2026 and Quantum Defender on October 2, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*