# Flex Scanner vs See through Calculator

The clearest difference is in-app purchases: See through Calculator at none against Flex Scanner's 3. Flex Scanner's advantage is ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. Flex Scanner sells 3 in-app purchases, starting at $0.99 per 7 days. See through Calculator asks for nothing beyond the download.

Flex Scanner ships an update every 9 days, See through Calculator fortnightly. The most recent releases landed on October 24, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | Flex Scanner | See through Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (24 ratings)](https://appshunter.io/ios/app/flex-scanner-pdf-scanner/id1521904431/reviews)** | — |
| Number of ratings | **24** | — |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 9 days** | Fortnightly |
| Monetization | Freemium | — |
| Size | 32 MB | 35 MB |
| Requires iOS | **15.0** | 15.8.3 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Coftivo Teknoloji LTD](https://appshunter.io/developer/1730111773) | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) |

## What reviewers say

### Flex Scanner

[App page](https://appshunter.io/ios/app/flex-scanner-pdf-scanner/id1521904431)

Transform your smartphone into a portable scanner with advanced OCR technology. Capture, store, and share documents in various formats like PDF, JPG, and TXT. Organize, edit, and secure your files with ease.

**Highlights:** Mobile document scanning, OCR text recognition, Multiple export formats (PDF, JPG, TXT), Document collaboration and sharing, File organization and password protection, Electronic signature integration

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $0.99 | per 7 days |
| Monthly | $1.99 | per month |
| Life Time | $9.99 | one-time |


### See through Calculator

[App page](https://appshunter.io/ios/app/see-through-calculator/id6737427308)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Flex Scanner free?

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

### Is See through Calculator free?

See through Calculator is free to download, with no in-app purchases.

### Do Flex Scanner or See through Calculator have ads?

See through Calculator shows ads; Flex Scanner does not.

### Which is updated more often, Flex Scanner or See through Calculator?

Flex Scanner ships an update every 9 days, and See through Calculator fortnightly. Most recently, Flex Scanner was updated on October 24, 2026 and See through Calculator on October 21, 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.*