# 信手书 vs Tendim

The clearest difference is update cadence: Tendim at every 2 weeks against 信手书's every 2 months. 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.

信手书 ships an update every 2 months, Tendim every 2 weeks. The most recent releases landed on September 18, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | 信手书 | Tendim |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Size | 54 MB | 93 MB |
| Requires iOS | **11** | 12.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [Beijing Certificate Authority Co., Ltd.](https://appshunter.io/developer/1074200787) | [羽 翁](https://appshunter.io/developer/1484446861) |

## What reviewers say

### 信手书

[App page](https://appshunter.io/ios/app/id1380101522)

**Features:** macOS Compatibility

**In-app purchases:** none


### Tendim

[App page](https://appshunter.io/ios/app/tendim/id1484446862)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 信手书 free?

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

### Is Tendim free?

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

### Do 信手书 or Tendim have ads?

Neither 信手书 nor Tendim shows ads.

### Which is updated more often, 信手书 or Tendim?

信手书 ships an update every 2 months, and Tendim every 2 weeks. Most recently, 信手书 was updated on September 18, 2026 and Tendim on September 9, 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.*