# Scanner Document PDF vs Echo

The clearest difference is update cadence: Echo at every 11 days against Scanner Document PDF's monthly. Scanner Document PDF's advantage is iOS requirement (15.1 vs 18.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Scanner Document PDF sells 10 one-off in-app purchases and Echo sells 3 in-app purchases, starting at $6.99 per month. Whichever you choose, the download price is not the number that matters.

Scanner Document PDF ships an update monthly, Echo every 11 days. The most recent releases landed on October 7, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Scanner Document PDF | Echo |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 11 days** |
| Size | 48 MB | 14 MB |
| Requires iOS | **15.1** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Checkturn SAS](https://appshunter.io/developer/1395082764) | [Tilek Koszhanov](https://appshunter.io/developer/1838761406) |

## What reviewers say

### Scanner Document PDF

[App page](https://appshunter.io/ios/app/scanner-document-pdf/id6761269929)

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Tip — $1 | $0.99 | one-time |
| Tip — $2 | $1.99 | one-time |
| Tip — $3 | $2.99 | one-time |
| Tip — $4 | $3.99 | one-time |
| Tip — $5 | $4.99 | one-time |
| Tip — $6 | $5.99 | one-time |
| Tip — $8 | $7.99 | one-time |
| Tip — $7 | $7.99 | one-time |
| Tip — $9 | $8.99 | one-time |
| Tip — $10 | $9.99 | one-time |


### Echo

[App page](https://appshunter.io/ios/app/echo-ai-voice-reminders/id6782978928)

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Echo Pro Monthly | $6.99 | per month |
| Echo Pro Yearly Promo | $16.99 | per year |
| Echo Pro Yearly | $29.99 | per year |


## Frequently asked questions

### Is Scanner Document PDF free?

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

### Is Echo free?

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

### Do Scanner Document PDF or Echo have ads?

Neither Scanner Document PDF nor Echo shows ads.

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

Scanner Document PDF ships an update monthly, and Echo every 11 days. Most recently, Scanner Document PDF was updated on October 7, 2026 and Echo on October 11, 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.*