# PDFOptim vs Ricster

The clearest difference is in-app purchases: Ricster at none against PDFOptim's 3. Ricster also leads on rating (5.0 vs 4.7). PDFOptim's advantage is ratings volume (292 vs 1) and iOS requirement (15.6 vs 26.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. PDFOptim sells 3 in-app purchases, starting at $0.99 per month. Ricster asks for nothing beyond the download.

Ricster holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: PDFOptim has 292 ratings behind it against 1, so its average is the more settled of the two.

PDFOptim ships an update every 5 months, Ricster every 3 months. The most recent releases landed on October 14, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | PDFOptim | Ricster |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (292 ratings)](https://appshunter.io/ios/app/pdfoptim/id903356489/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/ricster/id1623520669/reviews)** |
| Number of ratings | **292** | 1 |
| Positive reviews | 75.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 3 months** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 8 MB | 1 MB |
| Requires iOS | **15.6** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [RootRise Technologies Pvt. Ltd.](https://appshunter.io/developer/594431033) | [ATCREATE INC.](https://appshunter.io/developer/1623520671) |

## What reviewers say

### PDFOptim

[App page](https://appshunter.io/ios/app/pdfoptim/id903356489)

Easily compress and optimize PDF files on your iPhone and iPad. Reduce the size of large documents, saving storage space and transmission time. Offers both automatic and manual compression modes with advanced settings for image and vector graphics.

**Highlights:** Compress PDF documents, Optimize PDF files, Automatic compression mode, Manual compression mode, Adjust image resolution and quality, Optimize vector graphics, Support for password-protected PDFs

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium : Monthly Access | $0.99 | per month |
| Premium : Yearly Access | $2.99 | per year |
| Premium : Lifetime Access | $4.99 | one-time |

**What reviewers like**

- 👍 Excellent compression quality
- 🚀 Efficient and fast performance
- 👍 Simple and easy to use
- 💰 Good value for money (one-time purchase)
- 👍 No annoying subscriptions

**What reviewers complain about**

- 🐛 App not launching/freezing
- 🐛 Doesn't work for certain file types (e.g., GoodNotes)
- 🐛 Poor image quality/pixelation
- 🐛 Compression not effective on all PDFs
- 🐛 Confusing or illogical interface

**Reported bugs**

- App not launching on iOS 18.0.1
- App freezes during launch
- App won't take purchases
- Cannot optimize certain PDFs
- Compression not effective on marked-up PDFs

**Requested features**

- Support for iOS shortcuts
- macOS version integration/cross-platform compatibility
- Improved handling of specific file types like GoodNotes
- Better optimization for handwritten notes within PDFs
- Cloud storage for compressed documents (iCloud)


### Ricster

[App page](https://appshunter.io/ios/app/ricster/id1623520669)

This app allows you to connect to and control your @Create IoAg Remote Interface Controller (RIC). Monitor RIC status, configure settings like location and sensors, and view live readings for your setup. Access your sensor data conveniently through the portal feature.

**Highlights:** Connect and control RIC devices, Monitor RIC status (State, Mode, Battery), Configure settings (Location, State, Mode, Intervals), Configure sensors, View live sensor readings, Access sensor data via portal

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

**In-app purchases:** none


## Frequently asked questions

### Is PDFOptim free?

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

### Is Ricster free?

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

### Which has better reviews, PDFOptim or Ricster?

Ricster is rated higher. PDFOptim averages 4.7 out of 5 from 292 ratings, while Ricster averages 5.0 from 1 ratings.

### Do PDFOptim or Ricster have ads?

Neither PDFOptim nor Ricster shows ads.

### Which is updated more often, PDFOptim or Ricster?

PDFOptim ships an update every 5 months, and Ricster every 3 months. Most recently, PDFOptim was updated on October 14, 2026 and Ricster on September 29, 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.*