# Atom HMI vs PDF Scanner・Doc Scanner App

The clearest difference is in-app purchases: Atom HMI at none against PDF Scanner・Doc Scanner App's 3. Atom HMI also leads on ads (none vs shown). PDF Scanner・Doc Scanner App's advantage is update cadence (every 3 weeks vs every 25 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. PDF Scanner・Doc Scanner App sells 3 in-app purchases, starting at $5.99 per 7 days. Atom HMI asks for nothing beyond the download.

Atom HMI ships an update every 25 months, PDF Scanner・Doc Scanner App every 3 weeks. Both last shipped on October 3, 2026.

## The numbers

| Metric | Atom HMI | PDF Scanner・Doc Scanner App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.6 (90 ratings)](https://appshunter.io/ios/app/pdf-scannerdoc-scanner-app/id1602797155/reviews)** |
| Number of ratings | — | **90** |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 25 months | **Every 3 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 7 MB | 16 MB |
| Requires iOS | **13.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Adam Mandel](https://appshunter.io/developer/1230194566) | [Hazel Mobile](https://appshunter.io/developer/1555634974) |

## What reviewers say

### Atom HMI

[App page](https://appshunter.io/ios/app/atom-hmi/id1518658810)

**Features:** macOS Compatibility

**In-app purchases:** none


### PDF Scanner・Doc Scanner App

[App page](https://appshunter.io/ios/app/pdf-scannerdoc-scanner-app/id1602797155)

Easily scan documents and save them as high-quality PDFs or JPEGs. Features include batch scanning, cloud integration, and secure sharing options. OCR technology digitizes text for easy access and sharing.

**Highlights:** High-quality PDF and JPEG scans, Batch scanning for multiple pages, Cloud integration for access, Secure sharing and export options, OCR for text digitization, Adjustable scan settings

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads & File Share - Week | $5.99 | per 7 days |
| Remove Ads & File Share -Month | $7.99 | per month |
| Remove Ads & Share Files | $19.99 | one-time |


## Frequently asked questions

### Is Atom HMI free?

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

### Is PDF Scanner・Doc Scanner App free?

PDF Scanner・Doc Scanner App is free to download, with in-app purchases available.

### Do Atom HMI or PDF Scanner・Doc Scanner App have ads?

PDF Scanner・Doc Scanner App shows ads; Atom HMI does not.

### Which is updated more often, Atom HMI or PDF Scanner・Doc Scanner App?

Atom HMI ships an update every 25 months, and PDF Scanner・Doc Scanner App every 3 weeks. Most recently, Atom HMI was updated on October 3, 2026 and PDF Scanner・Doc Scanner App on October 3, 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.*