# PDF Crisp View vs Lumirox Optimizer

The clearest difference is in-app purchases: PDF Crisp View at none against Lumirox Optimizer's 2. Lumirox Optimizer's advantage is update cadence (weekly vs monthly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Lumirox Optimizer sells 2 in-app purchases, starting at $10.99 per 7 days. PDF Crisp View asks for nothing beyond the download.

PDF Crisp View ships an update monthly, Lumirox Optimizer weekly. The most recent releases landed on October 11, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | PDF Crisp View | Lumirox Optimizer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.5 (2 ratings)](https://appshunter.io/ios/app/lumirox-optimizer/id6763063077/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Weekly** |
| Monetization | — | Freemium |
| Size | 74 MB | 79 MB |
| Requires iOS | 15.6 | 15.6 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Running River Network Technology Limited](https://appshunter.io/developer/1804246053) | [ENRG SYSTEMS, SRL](https://appshunter.io/developer/1895144841) |

## What reviewers say

### PDF Crisp View

[App page](https://appshunter.io/ios/app/pdf-crisp-view-scannermaker/id6754379195)

**Features:** macOS Compatibility

**In-app purchases:** none


### Lumirox Optimizer

[App page](https://appshunter.io/ios/app/lumirox-optimizer/id6763063077)

Streamline your iPhone with a single tap. This app intelligently finds and removes duplicate photos, large videos, and forgotten screenshots. It also offers secure local storage for sensitive files and provides quick insights into your device's performance.

**Highlights:** One-tap phone cleaning, Duplicate photo detection, Large video removal, Secure local file storage, Wi-Fi and cellular speed tests, Device performance insights

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Premium | $10.99 | per 7 days |
| Quarterly Premium | $69.99 | per 3 months |


## Frequently asked questions

### Is PDF Crisp View free?

PDF Crisp View is free to download, with no in-app purchases.

### Is Lumirox Optimizer free?

Lumirox Optimizer is free to download, with in-app purchases available.

### Do PDF Crisp View or Lumirox Optimizer have ads?

Neither PDF Crisp View nor Lumirox Optimizer shows ads.

### Which is updated more often, PDF Crisp View or Lumirox Optimizer?

PDF Crisp View ships an update monthly, and Lumirox Optimizer weekly. Most recently, PDF Crisp View was updated on October 11, 2026 and Lumirox Optimizer on October 14, 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.*