# 知语同行 vs TrainTT

The clearest difference is update cadence: TrainTT at every 3 days against 知语同行's every 10 days. TrainTT also leads on iOS requirement (12.0 vs 15.5). 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.

知语同行 ships an update every 10 days, TrainTT every 3 days. The most recent releases landed on November 7, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | 知语同行 | TrainTT |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 days | **Every 3 days** |
| Size | 57 MB | 49 MB |
| Requires iOS | 15.5 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Hangzhou boyue Wenda Information Technology Co., Ltd](https://appshunter.io/developer/1507742120) | [Qian Yun Network Service Co., Ltd.](https://appshunter.io/developer/1567568557) |

## What reviewers say

### 知语同行

[App page](https://appshunter.io/ios/app/id1513534376)

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

**In-app purchases:** none


### TrainTT

[App page](https://appshunter.io/ios/app/traintt/id1597479690)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 知语同行 free?

知语同行 is free to download, with no in-app purchases.

### Is TrainTT free?

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

### Do 知语同行 or TrainTT have ads?

Neither 知语同行 nor TrainTT shows ads.

### Which is updated more often, 知语同行 or TrainTT?

知语同行 ships an update every 10 days, and TrainTT every 3 days. Most recently, 知语同行 was updated on November 7, 2026 and TrainTT on November 3, 2026.

---

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