# Document Scanner vs Echo

The clearest difference is in-app purchases: Document Scanner at none against Echo's 2. Document Scanner also leads on update cadence (every 5 days vs every 11 days) and iOS requirement (14.0 vs 17.0). On price, review sentiment, ads and device support there is nothing between them.

Both are free to download. Echo sells 2 in-app purchases, starting at $9.99 per month. Document Scanner asks for nothing beyond the download.

Document Scanner ships an update every 5 days, Echo every 11 days. The most recent releases landed on June 10, 2026 and June 27, 2026 respectively.

## The numbers

| Metric | Document Scanner | Echo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (7 ratings)](https://appshunter.io/ios/app/echo-semantic-voice-keyboard/id6758864952/reviews)** |
| Number of ratings | — | **7** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 11 days |
| Monetization | **Free** | Free with in-app purchases |
| Size | 32 MB | 44 MB |
| Requires iOS | **14.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Mobilions Labs Private Limited](https://appshunter.io/developer/1577176376) | [Xiang Gui](https://appshunter.io/developer/1875377340) |

## What reviewers say

### Document Scanner

[App page](https://appshunter.io/ios/app/document-scanner-doc-pdf-id/id6737333831)

Transform your phone into a powerful document scanner. Effortlessly capture high-resolution scans, create multi-page PDFs, and organize your files. Features include OCR, digital signatures, and secure file protection.

**Highlights:** High-resolution document scanning, Smart cropping and color filters, Multi-page PDF creation, Batch scanning and organization, OCR for text extraction, PDF compression and resizing, Digital signature and password protection

**Features:** macOS Compatibility

**In-app purchases:** none


### Echo

[App page](https://appshunter.io/ios/app/echo-semantic-voice-keyboard/id6758864952)

This AI-powered keyboard transforms your voice into text with advanced accuracy. It understands context to correct errors, add punctuation, and offer natural input. Features include real-time transcription, multiple AI editing modes, and bilingual support.

**Highlights:** Real-time streaming transcription, Multiple AI editing modes, Smart homophone correction, Bilingual support (Chinese & English), Integrated keyboard extension, Context-aware corrections, Personalized dictionary

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Echo Pro Monthly | $9.99 | per month |
| Echo Pro Annual | $79.99 | per year |


## Frequently asked questions

### Is Document Scanner free?

Document Scanner is free to download, with no in-app purchases.

### Is Echo free?

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

### Do Document Scanner or Echo have ads?

Neither Document Scanner nor Echo shows ads.

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

Document Scanner ships an update every 5 days, and Echo every 11 days. Most recently, Document Scanner was updated on June 10, 2026 and Echo on June 27, 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.*