# iSilo

> Document reader for multiple file formats with extensive organization and viewing features. (iPhone/iPad app by DC & Co..)

- Source: https://appshunter.io/ios/app/isilo/id284979163 (this page in markdown: same URL + `.md`)
- Developer: [DC & Co.](https://appshunter.io/developer/284947607)
- Category: Productivity, Reference
- Price: $9.99
- Rating: 3.80/5 from 50 App Store ratings · 269 written reviews indexed
- Age rating: 4+
- Requires: iOS 8.0 · 13 MB
- Languages: American English, French (France), European Portuguese, Chinese (Simplified, China), European Spanish, Chinese (Traditional, Taiwan)
- Released: 2019-02-01
- Data updated: 2026-09-01
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/isilo/id284979163/reviews.md

## What is iSilo?

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.

## Key features

- 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)

## What do users think of iSilo?

Overall sentiment: neutral

**Pros**

- 💻 Works well with Christian books
- 📚 Excellent for reading documents with embedded hyperlinks
- ⚡ Fast and smooth on many devices
- 🙌 Hands down a life-saving app
- 🏆 Basic but wonderful functionality

**Cons**

- 🐛 Crashes upon opening
- 🐛 Unable to download new material since 2017
- 🐛 Crashes when trying to open code-protected file
- 🐛 Scrolling issues and performance problems
- 🤖 Outdated and abandoned by developers

**Commonly reported bugs**

- 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

**Most requested features**

- 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

## Recent user reviews (10 of 269)

All indexed reviews: https://appshunter.io/ios/app/isilo/id284979163/reviews.md

### 1/5 — 用不了

*2026-03-26*

刚买的，结果用不了，文件用这个软件打开没反应，这个软件废了吗？

### 5/5 — 能否开发鸿蒙版

*2025-09-22*

能否开发鸿蒙版

### 1/5 — Not working

*2025-04-16, version 6.21*

Looks like iSilo is gone forever. Can’t open any pdb file.

### 1/5 — La estropearon

*2024-07-07, version 6.21*

Era posiblemente, la mejor aplicación que había para la Palm, pero cuando se introdujeron los nuevos sistemas operativos, no sé qué pasó con ella, pues en vez de conservar lo que ya tenían lo único que han hecho ha sido estropearlo todo, que ya no se pueda seleccionar parte de texto y copiar, me parece lo peor que han hecho

### 4/5 — Tengo el problema de que no mandan la actualización de un año para otro

*2024-03-27, version 6.21*

La app funciona muy bien pero tiene el problema que les comento porque los derechos para el uso ya los abone en su día

### 4/5 — Love this app

*2023-01-07, version 6.21*

This app works very well with my Christian books that I read! I wish they would do some more updates to the app! Because every time I open the app, it crashes. Then I have to open it again before it starts working normally.

### 3/5 — 환불요청 드립니다

*2022-04-16*

회사에서 사용 하였던 어플이었는데요. 이번에 핸드폰을 바꾸면서 모르고 구매 하였는데 회사에서 더이상 아이실로에대한 다른 파일들을 더이상 지원하지 않아 환불요청드립니다.

### 1/5 — Unable to download

*2022-02-12, version 6.21*

I have not been able to download new material since 2017. What’s wrong with this app?

### 5/5 — 书签功能用不了

*2021-11-11*

ios15

### 1/5 — Crashes upon opening

*2021-10-15, version 6.21*

Please fix the crash upon opening of the app. R

## Frequently asked questions about iSilo

### What types of documents can I read with this app?

This application supports a wide range of document formats, including iSilo, Palm Doc, and plain text files. It also offers the ability to view additional file types such as .jpg, .png, .gif, .tif, .pdf, .htm, Word (.doc, .docx), Excel (.xls, .xlsx), and PowerPoint (.ppt, .pptx).

### How can I get documents into the app?

You can easily transfer documents to your device via USB, through iSilo's built-in Wi-Fi file server from your computer, or by downloading them directly from the Web. The app also provides access to a library with tens of thousands of documents available for download.

### Can I customize how documents look when I read them?

Yes, the app offers extensive customization for document viewing. You can select font size and typeface, choose from customizable color themes with selectable background and text colors, and utilize features like autoscroll with adjustable speed and full-screen mode.

### What are the organizational features for my documents?

The app provides a document list with a recently viewed section, the ability to categorize documents into single or multiple categories, and options to mark favorite folders for quick access. It also includes a file explorer for managing document files and folders.

### Is this app free to use?

Yes, the application is available for free. There are no in-app purchases or advertisements mentioned, indicating a completely free user experience.

## Version history (last 5 releases)

### 6.21 — 2019-02-01

This update from Apple will improve the functionality of this app. No new features are included.

Added support for iPhone X

### 6.20.9 — 2017-09-21

Fixed crashes with updated Dropbox compatibility.

### 6.20.8 — 2017-09-16

Updated Dropbox compatibility.

### 6.20.7 — 2017-04-20

- Fixed issue with iOS 10.3.1 where in point assist select mode, when setting the ending point of the selection, the starting point is lost.
- Fixed issue where using point assist point mode, moving over an annotated section of text may result in the app crashing.

### 6.20.6 — 2016-05-20

- Fixed issue with not being able to change the annotation color.
- Fixed issue with not being able to select from document menus.
- Fixed issue with text over back/forward buttons.

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## More apps by DC & Co.

- [Ace Typer](https://appshunter.io/ios/app/ace-typer/id963937954)
- [Trends watch](https://appshunter.io/ios/app/trends-watch/id991942874)
- [iSilo free](https://appshunter.io/ios/app/isilo-free/id1006521923)
- [It's Raining Cats and Dogs](https://appshunter.io/ios/app/its-raining-cats-and-dogs/id1035388628)
- [Battle for DC](https://appshunter.io/ios/app/battle-for-dc/id1046052136)

All apps by DC & Co.: https://appshunter.io/developer/284947607

## Related topics

[isilo](https://appshunter.io/ios/topics/isilo) · [microfiche](https://appshunter.io/ios/topics/microfiche)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-01.*