# 估跑跑 vs Format Conversion格式转换

The clearest difference is in-app purchases: 估跑跑 at none against Format Conversion格式转换's 5. 估跑跑 also leads on update cadence (every 2 weeks vs every 3 months) and iOS requirement (8.0 vs 15.6). On price, ads and device support there is nothing between them.

Both are free to download. Format Conversion格式转换 sells 5 in-app purchases, starting at $1.99 per 7 days. 估跑跑 asks for nothing beyond the download.

估跑跑 ships an update every 2 weeks, Format Conversion格式转换 every 3 months. The most recent releases landed on October 27, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | 估跑跑 | Format Conversion格式转换 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 3 months |
| Size | 10 MB | 29 MB |
| Requires iOS | **8.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hang Zhou XiangShang Electronic Commerce Co., LTD](https://appshunter.io/developer/938563429) | [彦 唐](https://appshunter.io/developer/1438972298) |

## What reviewers say

### 估跑跑

[App page](https://appshunter.io/ios/app/id1570374594)

**Features:** macOS Compatibility

**In-app purchases:** none


### Format Conversion格式转换

[App page](https://appshunter.io/ios/app/format-conversion/id6744088667)

**Features:** macOS Compatibility

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PRO Weekly Subscription | $1.99 | per 7 days |
| PRO Monthly Subscription | $3.99 | per month |
| PRO Yearly Subscription | $14.99 | per year |
| Permanent VIP | $22.99 | one-time |
| Permanent PRO | $24.99 | one-time |


## Frequently asked questions

### Is 估跑跑 free?

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

### Is Format Conversion格式转换 free?

Format Conversion格式转换 is free to download, with in-app purchases available.

### Do 估跑跑 or Format Conversion格式转换 have ads?

Neither 估跑跑 nor Format Conversion格式转换 shows ads.

### Which is updated more often, 估跑跑 or Format Conversion格式转换?

估跑跑 ships an update every 2 weeks, and Format Conversion格式转换 every 3 months. Most recently, 估跑跑 was updated on October 27, 2026 and Format Conversion格式转换 on October 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.*