PDFOptim vs Ricster
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PDFOptim
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.
- 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
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PDFOptim is a simple and intuitive way to compress, optimize and reduce PDF documents on iPhones and iPads. PDFOptim provides easy and effective ways to compress large image and graphics heavy PDF files. Inbuilt side-by-side preview to compare original and compressed PDF. * * * PDFOptim for Mac is also available on the Mac App Store. * * * Compressed PDF documents requires less disk space for storage and faster uploads and downloads saves transmission time and cost. PDFOptim rewrites the entire PDF documents using selected compression options as efficiently as possible without compromising the document's integrity. If your PDF documents are in another app (For Example Mail, DropBox or SkyDrive etc.) that uses the Open In… button, tap the button to open the PDF document in PDFOptim. You can also transfer PDF documents from your desktop computer via iTunes into PDFOptim application on your iPhone or iPad. KEY FEATURES: AUTO COMPRESSION MODE - PDFOptim analyze document’s contents and apply algorithm to generate a smallest possible PDF by maintaining the document’s visual quality. Choose one of the four predefined Auto compression methods and let the app do the hard work for you. No further user interaction required to provide technical compression options. MANUAL COMPRESSION MODE - Change compression options manually to generate optimum sized PDF of your need. You can choose compression options to set from Image Color Model, Image Resolution, JPEG Image Quality, Optimise vector graphics level and Advance option. - Image color model to choose from RGB, Gray and Mono. Selecting Monochrome color model option converts raster PDF contents into black and white which helps reduces PDF file size to greater extent. It is very helpful when compressing scanned books mainly containing text. - Image resolution ppi (pixels/inch) control to resize raster image contents. Downsampling at lower resolution decrease the file size dramatically. - Quality control. Set quality from lossless to least for resampling all raster images into PDF. It allows you to control compressed PDF size and viewing quality. -Advance options to remove PDF content properties like alternate images, page thumbnails, documents structure hierarchy and output intent. - Optimize vector graphics option removes superfluous information to reduce vector graphics heavy PDF. Increase in optimize vector from 'Level 1' to 'Level 5' reduces output PDF file size less to more respectively. This option is very useful when PDF content mainly consist of high precision vector graphics, Usually PDF drawing, note-taking and PDF markup apps creates large vector graphics heavy PDF files which can be compressed by this option efficiently. - Password protected PDF documents supported for compression using correct password. - Single or multiple compressed PDFs can be shared as single ZIP (*.zip) file. - Allows Compressed PDFs to Open In… another application, Mail, Message, Print, share PDFs to nearby iOS devices via AirDrop. - Use Copy to iTunes to save and share compressed PDFs on your desktop computer. PDF VIEWER: - Inbuilt PDF viewer with fully selectable and searchable text contents. Select and copy text to clipboard for further use. - Pinch out and Pinch in to ZoomIn and ZoomOut view and search feature to find a character, word and sentence. - Scroll through your document by thumbnail view or Go to page feature. Note: PDFOptim is standalone application running natively to compress PDF documents securely on your iOS device. You can refer User Manual for any assistance Or Contact Support. *The free version has limitation to export one compressed PDF per week. Get Premium to remove all restrictions and start exporting an unlimited number of compressed PDFs. Privacy Policy: http://rootrisetech.com/pdfoptim-privacy-policy Terms of Use(EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Ricster
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.
- 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
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Ricster, the only app which connects and controls your @Create IoAg Remote Interface Controller (RIC). Use Ricster to check a RIC's status and see all the important information like State, Mode and Battery Voltage. Use the Settings menu to set Location, State, Mode and Reading Intervals as well as configure sensors. Use the Readings menu to see configured sensors and their current live readings to make sure your setup is correct. Use the handy Portal feature to easily and conveniently check your sensors and data. To view our Terms of Service please visit: https://atcreate005.web.app/ricster/terms-of-service To view our Privacy Policy please visit: https://atcreate005.web.app/ricster/privacy-policy
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | PDFOptim | Ricster |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (292 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 75.6% of reviews | — |
| Number of ratings | 292 — better | 1 |
| Update frequency | Every 5 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.6 — better | 26.0 |
| Further details — not scored | ||
| Size | 8 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | RootRise Technologies Pvt. Ltd. | ATCREATE INC. |
Customer experience
PDFOptim
Ricster
Bugs and requests
PDFOptim
Reported bugs
11 issues- 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
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- App no longer works after updates
- File compressed to a slightly smaller size with no significant reduction
- Graphics become unreadable or highly degraded
- App crashes
- Multitasking, drag and drop not working
- Doesn't use full screen on new iPads
Requested features
6 requests- 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)
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- Update for latest OS versions and multitasking features
Ricster
Not enough reviews yet to summarise bugs or requests.
In-app purchases
PDFOptim
- Premium : Monthly Access$0.991 Month
- Premium : Yearly Access3 Days trial$2.991 Year
- Premium : Lifetime Access$4.99
Ricster
No in-app purchases









