# 图片格式转换 vs RootDiary

The clearest difference is in-app purchases: RootDiary at none against 图片格式转换's 3. RootDiary also leads on update cadence (every 3 days vs weekly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. 图片格式转换 sells 3 in-app purchases, starting at $3.99 per month. RootDiary asks for nothing beyond the download.

图片格式转换 ships an update weekly, RootDiary every 3 days. The most recent releases landed on September 14, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | 图片格式转换 | RootDiary |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Weekly | **Every 3 days** |
| Size | 61 MB | 14 MB |
| Requires iOS | 16.0 | **15** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [子豪 张](https://appshunter.io/developer/1625809217) | [Anuj Naik](https://appshunter.io/developer/1880704501) |

## What reviewers say

### 图片格式转换

[App page](https://appshunter.io/ios/app/id6446273369)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Month Membership | $3.99 | per month |
| Season Membership | $9.99 | per 3 months |
| Year Membership | $19.99 | per year |


### RootDiary

[App page](https://appshunter.io/ios/app/rootdiary-plant-health-log/id6761601774)

**In-app purchases:** none


## Frequently asked questions

### Is 图片格式转换 free?

图片格式转换 is free to download, with in-app purchases available.

### Is RootDiary free?

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

### Do 图片格式转换 or RootDiary have ads?

Both 图片格式转换 and RootDiary show ads.

### Which is updated more often, 图片格式转换 or RootDiary?

图片格式转换 ships an update weekly, and RootDiary every 3 days. Most recently, 图片格式转换 was updated on September 14, 2026 and RootDiary 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.*