# Bird Sound Identification vs Document  PDF Scanner

The clearest difference is in-app purchases: Bird Sound Identification at none against Document  PDF Scanner's 3. Bird Sound Identification also leads on iOS requirement (15.8.3 vs 17.0). Document  PDF Scanner's advantage is ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. Document  PDF Scanner sells 3 in-app purchases, starting at $3.99 per month. Bird Sound Identification asks for nothing beyond the download.

## The numbers

| Metric | Bird Sound Identification | Document  PDF Scanner |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Fortnightly | — |
| Size | 36 MB | 4 MB |
| Requires iOS | **15.8.3** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) | [MD Shahariar Nazim Joy](https://appshunter.io/developer/1893961943) |

## What reviewers say

### Bird Sound Identification

[App page](https://appshunter.io/ios/app/bird-sound-identification/id6737462540)

**Features:** macOS Compatibility

**In-app purchases:** none


### Document  PDF Scanner

[App page](https://appshunter.io/ios/app/document-pdf-scanner/id6787870357)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $3.99 | per month |
| Pro Yearly | $19.99 | per year |
| Premium Lifetime | $39.99 | one-time |


## Frequently asked questions

### Is Bird Sound Identification free?

Bird Sound Identification is free to download, with no in-app purchases.

### Is Document  PDF Scanner free?

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

### Do Bird Sound Identification or Document  PDF Scanner have ads?

Bird Sound Identification shows ads; Document  PDF Scanner does not.

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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.*