# Prime Browser and Documents vs Castify

The clearest difference is in-app purchases: Prime Browser and Documents at none against Castify's 4. Prime Browser and Documents also leads on update cadence (daily vs every 3 days). Castify's advantage is ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Castify sells 4 in-app purchases, starting at $4.99 per 7 days. Prime Browser and Documents asks for nothing beyond the download.

Prime Browser and Documents ships an update daily, Castify every 3 days. The most recent releases landed on September 9, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Prime Browser and Documents | Castify |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Daily** | Every 3 days |
| Size | 56 MB | 19 MB |
| Requires iOS | **13.0** | 14 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Mohamed Soufellou](https://appshunter.io/developer/1729068247) | [瑞华 张](https://appshunter.io/developer/1608130007) |

## What reviewers say

### Prime Browser and Documents

[App page](https://appshunter.io/ios/app/prime-browser-and-documents/id6755691848)

**Features:** macOS Compatibility

**In-app purchases:** none


### Castify

[App page](https://appshunter.io/ios/app/castify-web-video-caster/id6774901335)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Premium | $4.99 | per 7 days |
| Monthly Premium | $9.99 | per month |
| Yearly Premium | $39.99 | per year |
| Lifetime Premium | $69.99 | one-time |


## Frequently asked questions

### Is Prime Browser and Documents free?

Prime Browser and Documents is free to download, with no in-app purchases.

### Is Castify free?

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

### Do Prime Browser and Documents or Castify have ads?

Prime Browser and Documents shows ads; Castify does not.

### Which is updated more often, Prime Browser and Documents or Castify?

Prime Browser and Documents ships an update daily, and Castify every 3 days. Most recently, Prime Browser and Documents was updated on September 9, 2026 and Castify on September 10, 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.*