# 玄坛备要 vs PaperFeed

The clearest difference is update cadence: 玄坛备要 at weekly against PaperFeed's fortnightly. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. 玄坛备要 sells 1 one-off in-app purchase and PaperFeed sells 2 in-app purchases, starting at $6.99 per month. Whichever you choose, the download price is not the number that matters.

玄坛备要 ships an update weekly, PaperFeed fortnightly. The most recent releases landed on August 21, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | 玄坛备要 | PaperFeed |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/id6503722274/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 87.5% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Fortnightly |
| Size | 32 MB | 18 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 9+ |
| Developer | [云龙 董](https://appshunter.io/developer/1727929772) | [勇 刘](https://appshunter.io/developer/1872085466) |

## What reviewers say

### 玄坛备要

[App page](https://appshunter.io/ios/app/id6503722274)

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 玄坛备要PRO | $19.99 | one-time |


### PaperFeed

[App page](https://appshunter.io/ios/app/paperfeed-ai-paper-reader/id6758459529)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PaperFeed Pro Monthly | $6.99 | per month |
| PaperFeed Pro Yearly | $69.99 | per year |


## Frequently asked questions

### Is 玄坛备要 free?

玄坛备要 is free to download, with in-app purchases available.

### Is PaperFeed free?

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

### Do 玄坛备要 or PaperFeed have ads?

Neither 玄坛备要 nor PaperFeed shows ads.

### Which is updated more often, 玄坛备要 or PaperFeed?

玄坛备要 ships an update weekly, and PaperFeed fortnightly. Most recently, 玄坛备要 was updated on August 21, 2026 and PaperFeed on September 24, 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.*