# PDF Scanner vs Echo

The clearest difference is ads: Echo at none against PDF Scanner's shown. Echo also leads on update cadence (weekly vs every 2 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. PDF Scanner sells 3 in-app purchases, starting at $3.99 per 7 days and Echo sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

PDF Scanner ships an update every 2 months, Echo weekly. The most recent releases landed on November 9, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | PDF Scanner | Echo |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Weekly** |
| Size | 17 MB | 52 MB |
| Requires iOS | 16.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [Isinsu Arici Tan](https://appshunter.io/developer/1831044149) | [Khaled Almare](https://appshunter.io/developer/1895344294) |

## What reviewers say

### PDF Scanner

[App page](https://appshunter.io/ios/app/pdf-scanner-ocr-scanner/id6761268466)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription | $3.99 | per 7 days |
| Yearly Subscription | $9.99 | per year |
| Lifetime Access | $6.99 | one-time |


### Echo

[App page](https://appshunter.io/ios/app/echo-ai-prompt-library/id6783035728)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Echo Premium | $4.99 | per month |
| Echo Premium | $49.99 | per year |


## Frequently asked questions

### Is PDF Scanner free?

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

### Is Echo free?

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

### Do PDF Scanner or Echo have ads?

PDF Scanner shows ads; Echo does not.

### Which is updated more often, PDF Scanner or Echo?

PDF Scanner ships an update every 2 months, and Echo weekly. Most recently, PDF Scanner was updated on November 9, 2026 and Echo on November 5, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*