# 灵线 vs 边注

The clearest difference is update cadence: 灵线 at every 3 days against 边注's monthly. 边注's advantage is iOS requirement (15.1 vs 18.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. 灵线 sells 2 in-app purchases, starting at $4.99 per month and 边注 sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

灵线 ships an update every 3 days, 边注 monthly. The most recent releases landed on October 31, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | 灵线 | 边注 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Monthly |
| Size | 28 MB | 345 MB |
| Requires iOS | 18.6 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Hefei Yi Qicheng Technology Co., Ltd.](https://appshunter.io/developer/1895580826) | [烜 张](https://appshunter.io/developer/1873916074) |

## What reviewers say

### 灵线

[App page](https://appshunter.io/ios/app/pdfai/id6763971571)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月度订阅 | $4.99 | per month |
| 年度订阅 | $39.99 | per year |


### 边注

[App page](https://appshunter.io/ios/app/id6764737944)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月订阅 | $2.99 | per month |
| 年订阅 | $14.99 | per year |


## Frequently asked questions

### Is 灵线 free?

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

### Is 边注 free?

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

### Do 灵线 or 边注 have ads?

Neither 灵线 nor 边注 shows ads.

### Which is updated more often, 灵线 or 边注?

灵线 ships an update every 3 days, and 边注 monthly. Most recently, 灵线 was updated on October 31, 2026 and 边注 on November 5, 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.*