# O3 vs TTLocker

The clearest difference is in-app purchases: TTLocker at none against O3's 1. O3's advantage is iOS requirement (16.0 vs 26.5). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. O3 sells 1 in-app purchase, starting at $6.00 per 7 days. TTLocker asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 9 days. The most recent releases landed on November 4, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | O3 | TTLocker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (12 ratings)](https://appshunter.io/ios/app/o3-study-with-friends/id6730118317/reviews)** | — |
| Number of ratings | **12** | — |
| Positive reviews | 90.9% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 9 days | Every 9 days |
| Monetization | Free with in-app purchases | — |
| Size | 171 MB | 8 MB |
| Requires iOS | **16.0** | 26.5 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [O3 Platforms Limited](https://appshunter.io/developer/1850051015) | [杰豪 张](https://appshunter.io/developer/1521783674) |

## What reviewers say

### O3

[App page](https://appshunter.io/ios/app/o3-study-with-friends/id6730118317)

Discover and access 24/7 study cafes designed for focused work and social interaction. Book spaces, connect with others, and enhance your productivity in a unique cafe environment.

**Highlights:** Unlock 24/7 study cafes, Book study spaces, Work and study environments, Meet new people, Socialize in cafes

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 10HR COMBO | $6.00 | per 7 days |


### TTLocker

[App page](https://appshunter.io/ios/app/ttlocker-quiz-before-scroll/id6820415997)

**In-app purchases:** none


## Frequently asked questions

### Is O3 free?

O3 is free to download, with in-app purchases available.

### Is TTLocker free?

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

### Do O3 or TTLocker have ads?

Neither O3 nor TTLocker shows ads.

### Which is updated more often, O3 or TTLocker?

O3 ships an update every 9 days, and TTLocker every 9 days. Most recently, O3 was updated on November 4, 2026 and TTLocker 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.*