# ScanFlow PDF Scanner vs GemTrail

The clearest difference is in-app purchases: GemTrail at none against ScanFlow PDF Scanner's 3. ScanFlow PDF Scanner's advantage is update cadence (every 3 weeks vs every 6 weeks) and iOS requirement (15.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. ScanFlow PDF Scanner sells 3 in-app purchases, starting at $9.99 per 7 days. GemTrail asks for nothing beyond the download.

ScanFlow PDF Scanner ships an update every 3 weeks, GemTrail every 6 weeks. Both last shipped on October 10, 2026.

## The numbers

| Metric | ScanFlow PDF Scanner | GemTrail |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 6 weeks |
| Size | 44 MB | 51 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [倩倩 王](https://appshunter.io/developer/1860754687) | [BYTECRAFTERSLIMITED](https://appshunter.io/developer/6786246578) |

## What reviewers say

### ScanFlow PDF Scanner

[App page](https://appshunter.io/ios/app/scanflow-pdf-scanner/id6763491224)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| VIP Membership | $9.99 | per 7 days |
| VIP Membership | $39.99 | per year |
| VIP Membership | $59.99 | one-time |


### GemTrail

[App page](https://appshunter.io/ios/app/gemtrail-rock-identifier/id6786246576)

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

**In-app purchases:** none


## Frequently asked questions

### Is ScanFlow PDF Scanner free?

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

### Is GemTrail free?

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

### Do ScanFlow PDF Scanner or GemTrail have ads?

Neither ScanFlow PDF Scanner nor GemTrail shows ads.

### Which is updated more often, ScanFlow PDF Scanner or GemTrail?

ScanFlow PDF Scanner ships an update every 3 weeks, and GemTrail every 6 weeks. Most recently, ScanFlow PDF Scanner was updated on October 10, 2026 and GemTrail on October 10, 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.*