# Clicka! vs O

The clearest difference is in-app purchases: Clicka! at none against O's 1. Clicka! also leads on ads (none vs shown) and review sentiment (95% vs 72%). On price, rating, update cadence and device support there is nothing between them.

Both are free to download. O sells 1 one-off in-app purchase. Clicka! asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.7 for Clicka! against 4.6 for O. That said, the two scores are not equally well evidenced: Clicka! has 2.4K ratings behind it against 191, so its average is the more settled of the two. Written reviews are what separate them: 95% of Clicka!'s written reviews are positive against 72% of O's.

Both ship on a similar rhythm, roughly weekly. The most recent releases landed on September 28, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | Clicka! | O |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (2.4K ratings)](https://appshunter.io/ios/app/clicka/id1067605464/reviews)** | [4.6 (191 ratings)](https://appshunter.io/ios/app/o-void/id6449623550/reviews) |
| Number of ratings | **2.4K** | 191 |
| Positive reviews | **95.0% of reviews** | 72.4% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Weekly | Weekly |
| Monetization | **Free** | Free with in-app purchases |
| Size | 2 MB | 43 MB |
| Requires iOS | 14.0 | **13.0** |
| Devices | **iPhone, iPad, iPod, Apple TV** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Calvin Liang](https://appshunter.io/developer/942371221) | [Gearhead Games ApS](https://appshunter.io/developer/1163605497) |

## What reviewers say

### Clicka!

[App page](https://appshunter.io/ios/app/clicka/id1067605464)

This is a minimalist game where a number on the screen increments by one with each tap. It's designed as a simple time-waster with no complex mechanics or objectives.

**Highlights:** Number incrementing on click, Minimalist design, Time-wasting gameplay, Simple interface

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 👍 Customizable click sounds and vibrations
- 👍 Addictive and satisfying to use
- 👍 Helps with ADHD and anxiety
- 👍 No ads or in-app purchases

**What reviewers complain about**

- 🐛 Crashes or freezes on some devices
- 🐛 Leaderboard issues or not working
- 🔋 Can be a major time sink

**Reported bugs**

- Leaderboard not updating properly
- Crashes when opening the app

**Requested features**

- Add a reset button
- Expand color and sound customization options
- Implement an endless mode or challenges


### O

[App page](https://appshunter.io/ios/app/o-void/id6449623550)

Navigate a spinning circle through challenging obstacles in this minimal action runner. Levels dynamically change direction and flip, testing your reflexes. Compete globally and unlock customizations.

**Highlights:** One-tap gameplay, Mind-bending geometry, Randomly generated levels, Chiptune soundtrack, Unlockable customizations, Global leaderboards

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| No Ads | $2.99 | one-time |

**What reviewers like**

- 🎶 Great music/soundtrack
- 🎮 Challenging and satisfying gameplay
- 💡 Innovative game mechanics
- 💯 High skill ceiling/mastery
- ✨ Simple yet addictive

**What reviewers complain about**

- 😵 Dizzying/makes users sick
- 🥵 Extremely difficult/too hard
- ⏳ Too short/lacks content
- 😵‍💫 Trippy and weird visuals
- 🤢 Makes users feel sick

**Reported bugs**

- Spinning makes users sick
- Obstacles in later levels require luck/insane reaction time
- Effect does not disappear properly in penultimate level
- Game is glitchy, laggy, and unresponsive
- Revive ad doesn't work/can't close ad

**Requested features**

- Add more levels
- New dimension/different gameplay principle
- User level creator
- More beats/music synchronization
- Option to turn down color brightness


## Frequently asked questions

### Is Clicka! free?

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

### Is O free?

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

### Which has better reviews, Clicka! or O?

Clicka! is rated higher. Clicka! averages 4.7 out of 5 from 2.4K ratings, while O averages 4.6 from 191 ratings.

### Do Clicka! or O have ads?

O shows ads; Clicka! does not.

### Which is updated more often, Clicka! or O?

Clicka! ships an update weekly, and O weekly. Most recently, Clicka! was updated on September 28, 2026 and O on September 26, 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.*