# Oxygen vs 缘分树洞

The clearest difference is update cadence: 缘分树洞 at every 5 days against Oxygen's every 3 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Oxygen sells 8 one-off in-app purchases and 缘分树洞 sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Oxygen ships an update every 3 weeks, 缘分树洞 every 5 days. The most recent releases landed on September 9, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Oxygen | 缘分树洞 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.4 (7 ratings)](https://appshunter.io/ios/app/id6478656704/reviews)** |
| Number of ratings | — | **7** |
| Positive reviews | — | 93.3% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 5 days** |
| Monetization | — | Free with in-app purchases |
| Size | 40 MB | 60 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 17+ |
| Developer | [进田 吴](https://appshunter.io/developer/1771205662) | [亚楠 高](https://appshunter.io/developer/1678905215) |

## What reviewers say

### Oxygen

[App page](https://appshunter.io/ios/app/oxygen/id6475773861)

**Features:** macOS Compatibility

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 100个金币 | $0.99 | one-time |
| 1个月会员 | $3.99 | one-time |
| 500个金币 | $3.99 | one-time |
| 3个月会员 | $6.99 | one-time |
| 6个月会员 | $9.99 | one-time |
| 2000个金币 | $14.99 | one-time |
| 12个月会员 | $19.99 | one-time |
| 168元购买5000个金币 | $24.99 | one-time |


### 缘分树洞

[App page](https://appshunter.io/ios/app/id6478656704)

Express your feelings anonymously and connect with people worldwide. This platform combines traditional "message in a bottle" concepts with modern instant messaging for a unique social experience. Find understanding, explore conversations, and enjoy secure, private interactions.

**Highlights:** Anonymous chat environment, Intelligent friend matching, Instant communication, Secure and stable platform, Privacy protection

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 缘分树洞会员30天 | $3.99 | one-time |
| 30元金币 | $3.99 | one-time |


## Frequently asked questions

### Is Oxygen free?

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

### Is 缘分树洞 free?

缘分树洞 is free to download, with in-app purchases available.

### Do Oxygen or 缘分树洞 have ads?

Neither Oxygen nor 缘分树洞 shows ads.

### Which is updated more often, Oxygen or 缘分树洞?

Oxygen ships an update every 3 weeks, and 缘分树洞 every 5 days. Most recently, Oxygen was updated on September 9, 2026 and 缘分树洞 on September 22, 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.*