# i前海 vs S1Fun

The clearest difference is in-app purchases: i前海 at none against S1Fun's 4. i前海 also leads on iOS requirement (9.0 vs 12.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. S1Fun sells 4 one-off in-app purchases. i前海 asks for nothing beyond the download.

i前海 ships an update every 5 weeks, S1Fun monthly. The most recent releases landed on September 29, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | i前海 | S1Fun |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/s1fun/id1531897069/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Monthly** |
| Monetization | — | Free with in-app purchases |
| Size | 36 MB | 31 MB |
| Requires iOS | **9.0** | 12.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Shenzhen Qianhai Development & Investment Holding Co.,Ltd](https://appshunter.io/developer/1580350383) | [程 徐](https://appshunter.io/developer/1531890669) |

## What reviewers say

### i前海

[App page](https://appshunter.io/ios/app/i/id1468245655)

**Features:** macOS Compatibility

**In-app purchases:** none


### S1Fun

[App page](https://appshunter.io/ios/app/s1fun/id1531897069)

This app provides a third-party client for the S1 forum, allowing users to customize their browsing experience. It offers intuitive gesture controls for navigating forums, managing favorite boards, and interacting with posts. Enjoy a streamlined way to access and engage with S1 forum content.

**Highlights:** Customize forum browsing, Add/remove favorite forums, Reorder favorite forums, Gesture controls for navigation, Refresh forum data with a tap, Quickly return to top of page

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 一瓶快乐水 | $0.99 | one-time |
| 一杯黑咖啡 | $0.99 | one-time |
| 两杯黑咖啡 | $1.99 | one-time |
| 一顿汉堡王 | $3.99 | one-time |


## Frequently asked questions

### Is i前海 free?

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

### Is S1Fun free?

S1Fun is free to download, with in-app purchases available.

### Do i前海 or S1Fun have ads?

Neither i前海 nor S1Fun shows ads.

### Which is updated more often, i前海 or S1Fun?

i前海 ships an update every 5 weeks, and S1Fun monthly. Most recently, i前海 was updated on September 29, 2026 and S1Fun on October 4, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*