# 树洞先生心情日记 vs Oxygen

树洞先生心情日记 and Oxygen are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. 树洞先生心情日记 sells 4 one-off in-app purchases and Oxygen sells 8 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

树洞先生心情日记 ships an update every 3 weeks, Oxygen every 4 weeks. The most recent releases landed on October 8, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | 树洞先生心情日记 | Oxygen |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/id1489909318/reviews)** | — |
| Number of ratings | **3** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 4 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 10 MB | 40 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 17+ |
| Developer | [明明 孙](https://appshunter.io/developer/561078691) | [进田 吴](https://appshunter.io/developer/1771205662) |

## What reviewers say

### 树洞先生心情日记

[App page](https://appshunter.io/ios/app/id1489909318)

An anonymous social platform for sharing secrets and daily thoughts. Record your feelings with cute emojis, or use a coin flip feature for life decisions. A private space to vent and express yourself without judgment.

**Highlights:** Anonymous posting, Secret sharing, Mood journaling with emojis, Coin flip for decisions, Private space for venting

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 许愿池投币1 | $0.99 | one-time |
| 月会员3元 | $0.99 | one-time |
| 半年会员18元 | $2.99 | one-time |
| 年会员 | $4.99 | one-time |


### Oxygen

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

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

**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 |


## Frequently asked questions

### Is 树洞先生心情日记 free?

树洞先生心情日记 is free to download, with in-app purchases available.

### Is Oxygen free?

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

### Do 树洞先生心情日记 or Oxygen have ads?

Neither 树洞先生心情日记 nor Oxygen shows ads.

### Which is updated more often, 树洞先生心情日记 or Oxygen?

树洞先生心情日记 ships an update every 3 weeks, and Oxygen every 4 weeks. Most recently, 树洞先生心情日记 was updated on October 8, 2026 and Oxygen on October 11, 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.*