# PDF Scanner vs Caption AI

The clearest difference is update cadence: PDF Scanner at every 8 days against Caption AI's monthly. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. PDF Scanner sells 1 one-off in-app purchase and Caption AI sells 4 in-app purchases, starting at $2.99 per 7 days. Whichever you choose, the download price is not the number that matters.

PDF Scanner ships an update every 8 days, Caption AI monthly. The most recent releases landed on October 4, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | PDF Scanner | Caption AI |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 8 days** | Monthly |
| Size | 28 MB | 48 MB |
| Requires iOS | 16.0 | 16.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [GameChief FZ-LLC](https://appshunter.io/developer/1785613402) | [Beijing Xingnian Trading Department (Individually Owned Business)](https://appshunter.io/developer/1556019310) |

## What reviewers say

### PDF Scanner

[App page](https://appshunter.io/ios/app/pdf-scanner-text-to-speech/id6747193594)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads Unlock All Features | $4.99 | one-time |


### Caption AI

[App page](https://appshunter.io/ios/app/caption-ai-subtitle-maker/id6760328167)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $2.99 | per 7 days |
| Monthly | $3.99 | per month |
| Annual | $14.99 | per year |
| Lifetime | $59.99 | one-time |


## Frequently asked questions

### Is PDF Scanner free?

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

### Is Caption AI free?

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

### Do PDF Scanner or Caption AI have ads?

Neither PDF Scanner nor Caption AI shows ads.

### Which is updated more often, PDF Scanner or Caption AI?

PDF Scanner ships an update every 8 days, and Caption AI monthly. Most recently, PDF Scanner was updated on October 4, 2026 and Caption AI on October 12, 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.*