# 铁合金在线 vs 申信

The clearest difference is update cadence: 申信 at every 3 weeks against 铁合金在线's every 3 months. 申信 also leads on iOS requirement (13.0 vs 15). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

铁合金在线 ships an update every 3 months, 申信 every 3 weeks. The most recent releases landed on October 29, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | 铁合金在线 | 申信 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Size | 59 MB | 25 MB |
| Requires iOS | 15 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Chengdu Felo Internet Tech. Co. ,Ltd.](https://appshunter.io/developer/897496769) | [上海荣瑜信息技术有限公司](https://appshunter.io/developer/1452023190) |

## What reviewers say

### 铁合金在线

[App page](https://appshunter.io/ios/app/id897496766)

**In-app purchases:** none


### 申信

[App page](https://appshunter.io/ios/app/id1452023191)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 铁合金在线 free?

铁合金在线 is free to download, with no in-app purchases.

### Is 申信 free?

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

### Do 铁合金在线 or 申信 have ads?

Neither 铁合金在线 nor 申信 shows ads.

### Which is updated more often, 铁合金在线 or 申信?

铁合金在线 ships an update every 3 months, and 申信 every 3 weeks. Most recently, 铁合金在线 was updated on October 29, 2026 and 申信 on October 26, 2026.

---

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