# E手签 vs J博士

The clearest difference is iOS requirement: J博士 at 10 against E手签's 12.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

E手签 ships an update monthly, J博士 every 2 months. The most recent releases landed on September 17, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | E手签 | J博士 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 2 months |
| Size | 129 MB | 54 MB |
| Requires iOS | 12.0 | **10** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [凯特信安](https://appshunter.io/developer/877527432) | [北京安信立融科技股份有限公司](https://appshunter.io/developer/1227679025) |

## What reviewers say

### E手签

[App page](https://appshunter.io/ios/app/e/id1227356531)

**In-app purchases:** none


### J博士

[App page](https://appshunter.io/ios/app/j/id1227679026)

**In-app purchases:** none


## Frequently asked questions

### Is E手签 free?

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

### Is J博士 free?

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

### Do E手签 or J博士 have ads?

Neither E手签 nor J博士 shows ads.

### Which is updated more often, E手签 or J博士?

E手签 ships an update monthly, and J博士 every 2 months. Most recently, E手签 was updated on September 17, 2026 and J博士 on September 18, 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.*