iSilo vs OptimalWork
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
iSilo
Read various document formats including iSilo, Palm Doc, and plain text. Access a vast library of content, organize your files, and customize viewing options for a personalized reading experience. Transfer documents easily via USB, Wi-Fi, or web download.
- Supports iSilo, Palm Doc, and plain text formats
- Extensive document library and creation tools
- Organize documents with categories and favorites
- Customizable viewing options (font, colors, themes)
- Autoscroll, full-screen, and orientation support
- Text search, copy, and annotation
- Multiple document transfer methods (USB, Wi-Fi, Web)
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Document reader for viewing document files in iSilo, Palm Doc, and plain text format. Bonus: Get the complete edition of the CIA World Factbook for free, with layout optimized for viewing on your iPhone, iPod touch, or iPad using iSilo. In addition to full information for all the countries of the world, the complete edition contains appendixes, reference maps, field cross-reference links, rank order pages, country profiles for all fields, enlarged flag pages with descriptions, enlarged country maps, and more. Tens of thousands of documents, eBooks, reference works, non-fiction, fiction available for ready download through the iSilo library. Create your own documents too. Document list provides recently viewed list of documents, ability to categorize documents into single or multiple categories, marking of favorite folders for easy access, and file explorer access to entire document directory with document file management operations, such as copying/moving/deleting/renaming document files and creating/deleting/renaming folders. Document viewing options provide for font size and typeface selection, along with customizable color themes with selectable background and text colors. Autoscroll with adjustable speed, view documents in full screen, complete support for both portrait and landscape orientations and rotation. Jump history for easily navigating back and forth when following hyperlinks and jumping to different locations in the document. Documents open to last viewed location. Bookmarks. Document text search. Select a range of text to copy or annotate it with a comment and choice of color highlighting. Easily transfer documents to your device via USB, via Wi-Fi by connecting to iSilo's built-in file server from your computer, or via download from the Web. Configure the screen to perform actions when tapped. Assignable actions include scrolling, full screen mode, font sizing, among many others. The latest version adds the ability to view additional file types. Additional image file types include .jpg, .png, .gif, .tif, among others. Additional document file types include .pdf, .htm, Word (.doc, .docx), Excel (.xls, .xlsx), and PowerPoint (.ppt, .pptx). See the manual for more details on the additional file type support.
OptimalWork
This app helps you overcome procrastination, anxiety, and distraction by applying a new psychology of growth to your daily work. Achieve new heights of productivity, focus, and skill by approaching challenges as opportunities for profound development.
- Psychology of growth approach
- Overcome procrastination
- Reduce anxiety and distraction
- Enhance productivity and focus
- Skill development
- Daily work application
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The OptimalWork App is based on a revolutionary new psychology of growth. We'll teach you how to approach every challenge you face as a moment of profound growth. Not only that, you can apply everything in your daily work to overcome procrastination, anxiety, and distraction and achieve new heights of productivity, focus, and skill. Terms of Use - https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is review sentiment: OptimalWork at 100% against iSilo's 51%. OptimalWork also leads on price (Free vs $9.99) and rating (4.8 vs 3.8). iSilo's advantage is in-app purchases (none vs 8) and chart position (#93 vs unranked). On ratings volume, 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
OptimalWork is free to download; iSilo costs $9.99 up front. OptimalWork sells 8 in-app purchases, starting at $18.95 per month. iSilo asks for nothing beyond the download.
OptimalWork holds the better App Store score, 4.8 against 3.8. Both are backed by a comparable volume of ratings — 50 and 19 respectively. Written reviews point the same way: 51% of iSilo's written reviews are positive against 100% of OptimalWork's.
iSilo ships an update every 3 weeks, OptimalWork fortnightly. The most recent releases landed on September 28, 2026 and September 21, 2026 respectively.
| Parameter | iSilo | OptimalWork |
|---|---|---|
| Price | $9.99 | Free — better |
| Rating | 3.8 (50 ratings) | 4.8 (19 ratings) — better |
| Positive reviews | 50.6% of reviews | 100.0% of reviews — better |
| Number of ratings | 50 — better | 19 |
| Update frequency | Every 3 weeks | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Best chart rank | #93 — better | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Apple Watch — better |
| Requires iOS | 8.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 13 MB | 82 MB |
| Age rating | 4+ | 4+ |
| Developer | DC & Co. | OptimalWork |
Customer experience
iSilo
OptimalWork
Bugs and requests
iSilo
Reported bugs
5 issues- Crashes when trying to open certain file formats
- Displaying issues with Palm format (PDB) files
- Inability to download files from Dropbox
- Text going off-screen after recent updates
- Bookmarks and annotations not syncing across devices
Requested features
5 requests- Add dark mode feature
- Improve text highlighting and annotation capabilities
- Implement cloud sync and cross-device support
- Modernize the user interface
- Add support for iOS Files app
OptimalWork
Not enough reviews yet to summarise bugs or requests.
In-app purchases
iSilo
No in-app purchases
OptimalWork
- Basic - Student Monthly$18.951 Month
- Basic - Monthly$24.951 Month
- Premium - Student Monthly$35.951 Month
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- Premium - Monthly$49.951 Month
- Basic - Student Yearly$149.991 Year
- Basic - Yearly$199.991 Year
- Premium - Student Yearly$274.991 Year
- Premium - Yearly$359.991 Year









