# BTU XT vs Document Scanner | Scan to PDF

The clearest difference is in-app purchases: BTU XT at none against Document Scanner | Scan to PDF's 3. BTU XT also leads on iOS requirement (11.0 vs 18.6). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Document Scanner | Scan to PDF sells 3 in-app purchases, starting at $6.99 per 7 days. BTU XT asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 16, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | BTU XT | Document Scanner | Scan to PDF |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (5 ratings)](https://appshunter.io/ios/app/btu-xt/id790911884/reviews)** | — |
| Number of ratings | **5** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free | — |
| Size | 8 MB | 19 MB |
| Requires iOS | **11.0** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [BTU Ventilation](https://appshunter.io/developer/790911887) | [KELVIN SENANU WALLACE](https://appshunter.io/developer/1888050842) |

## What reviewers say

### BTU XT

[App page](https://appshunter.io/ios/app/btu-xt/id790911884)

Monitor and control agricultural storage environments remotely. Securely access unit status, view detailed equipment data, and adjust control panel parameters with a familiar interface. Designed for ease of use with a simple human-machine interface.

**Highlights:** Remote environment monitoring, Secure user login, View unit status and parameters, Detailed equipment data display, Adjust control panel settings, Familiar HMI interface

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

**In-app purchases:** none


### Document Scanner | Scan to PDF

[App page](https://appshunter.io/ios/app/document-scanner-scan-to-pdf/id6767529356)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Access for a week | $6.99 | per 7 days |
| Pro Access for a year | $49.99 | per year |
| All Access Forever | $69.99 | one-time |


## Frequently asked questions

### Is BTU XT free?

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

### Is Document Scanner | Scan to PDF free?

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

### Do BTU XT or Document Scanner | Scan to PDF have ads?

Neither BTU XT nor Document Scanner | Scan to PDF shows ads.

### Which is updated more often, BTU XT or Document Scanner | Scan to PDF?

BTU XT ships an update every 2 months, and Document Scanner | Scan to PDF every 2 months. Most recently, BTU XT was updated on October 16, 2026 and Document Scanner | Scan to PDF on October 17, 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.*