# Acrosync - private cloud drive powered by rsync > iOS rsync client for private cloud drive and folder synchronization. (iPhone/iPad app by Acrosync LLC.) - Source: https://appshunter.io/ios/app/acrosync-private-cloud-drive-powered-by-rsync/id428855722 (this page in markdown: same URL + `.md`) - Developer: [Acrosync LLC](https://appshunter.io/developer/428846552) - Category: Productivity, Utilities - Price: $4.99 - Rating: 2.30/5 from 7 App Store ratings · 27 written reviews indexed - Age rating: 4+ - Requires: iOS 8.0 · 6 MB - Languages: American English - Released: 2011-04-06 - Data updated: 2026-06-10 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/acrosync-private-cloud-drive-powered-by-rsync/id428855722/reviews.md ## What is Acrosync? Acrosync is the only iOS app that implements the rsync protocol, a fast, efficient, and reliable folder synchronization protocol supported by most Mac/Linux computers, NAS, or remote servers without server side installation. As an rsync client, Acrosync lets you easily sync selected folders between your computers and your iOS devices. You just need one tap to start full folder sync, which is be smart enough to skip identical files and transfer only new or modified files. For modified files, it can even perform a differential sync algorithm and only transfer modified parts, in order to further save bandwidth and improve sync speed. File transfer can be encrypted to secure against unsafe networks, and verified using checksums to avoid corruptions. With advanced sync options, you can specify arbitrary port to connect, the connection protocol (ssh or rsync) to use, and so on. Selective sync is also supported by specifying include/exclude patterns, so you can sync only a certain set of files, and/or exclude files you don't want to sync. All files are stored locally so you will always have offline access to all your documents, photos, videos, etc, on your devices all the time, even when there is no network connection. A slick and intuitive interface designed from mobile devices allows you to browse files easily and quickly. Almost all multimedia files and documents can be opened, including music, photo, movie, txt, html, pdf, word, excel, powerpoint, keynote, pages, numbers, and many others. With new features introduced in the iOS 8 storage extension, Acrosync now acts as a private cloud drive that serve files for other apps -- filed stored in Acrosync can be easily shared by other apps using the universal document picker interface, without the need to switch to Acrosync. Changes made by other apps can be saved to Acrosync using the same interface, and synced back to computers automatically. As a result, Acrosync now behaves similarly to popular cloud drives such as iCloud, Dropbox, Box.net. However, with Acrosync you will always have the offline access and you can basically turn any computer into a private cloud server, without installing proprietary server software. Computer requirements: • Mac computers must have Remote Login enabled (System Preferences -> Sharing -> Remote Login). • For Windows computers, openssh and rsync must be installed, both of which are freely available as independent packages, or as part of cygwin. Acrosync is compatible with rsync hosting providers such as HiDrive and Strongspace, as well as major NASes like QNAP and Synology. The rsync library used by Acrosync was built from scratch and recently released as an open-source project. ## Key features - Rsync protocol implementation - Folder synchronization - Differential file transfer - Encrypted file transfer - Offline file access - Private cloud drive functionality - Selective sync with include/exclude patterns ## Recent user reviews (10 of 27) All indexed reviews: https://appshunter.io/ios/app/acrosync-private-cloud-drive-powered-by-rsync/id428855722/reviews.md ### 1/5 — Doesn’t Work *2025-12-02, version 3.1* More than 10 years old and just doesn’t work. Shouldn’t even be on the App Store. Total ripoff. ### 1/5 — Broken App *2024-03-26, version 3.1* Does not work on Linux for ssh or rsync. Robbing people blind! This app should be banned! ### 1/5 — Doesn’t work anymore *2024-01-05, version 3.1* The app hasn’t been updated in years, and is not compatible with newer SSH servers, because it relies on insecure encryption settings. Even if you figure out how to enable the insecure encryption on the server (which is a security hole), the app has other random errors that are impossible to debug. Also, since it hasn’t been updated, it’s not compatible with multitasking. You have to keep it in the foreground to transfer anything (when it even works). This app shouldn’t be for sale. ### 1/5 — Didn’t work on my iPhone 8 *2020-02-13, version 3.1* This app wouldn’t connect to rsync.net on my iPhone 8. I contacted tech support, but their answer was essentially “it works here.” Well, my rsync account works with Linux rsync on my office computer and a Rackspace server. Acrosync doesn’t use the Linux rsync though: they wrote their own. Maybe that’s a good place to look for a problem. Uninstalled. ### 1/5 — Gave up. Avoid *2017-09-13, version 3.1* Couldn't get this product to work at all. The UI on an iPad is really really horrible. Looks like it's stuck in the pre-retina days, horrible fuzzy red and ugly huge fonts. Also keeps forgetting passwords. But since it didn't even work at all, just kept producing huge delays followed by the same meaningless error messages, it hardly matters. Must try a lot harder. And some actual real-world testing would be a start. ### 1/5 — Worst *2016-12-06, version 3.1* Too expensive for limited and frustrating features, can't sort by date, can't sync the whole photo album I have to select the photos one by one, what if I have hundreds of photos?! And I have to add files from other apps to its "private" folder to sync?? Cmon! Sorry dev but this really irritated me this late at night, this app should be no more than 50cents! ### 5/5 — Acrosync Is Probably For You Too *2016-08-04, version 3.1* My life just got much simpler because of this. Thank you. ### 5/5 — Great app *2016-06-23, version 3.1* Syncs perfectly to device and has a built-in file manager that has its own file opening software for all file types. Only issue is you have to manually download or upload but that's no big deal for what I'm using it for since most changes are made on the server. Great app worth the money in my opinion! ### 4/5 — Quick Setup *2014-12-24, version 3.0* Worked right away with my Qnap and Thecus NAS boxes. Looking good so far. ### 1/5 — Very poor documentation or help *2014-12-17, version 3.0* Downloaded this app to try Rsync on my iPad to my QNAP nas which this product claims to work with. After several attempts it failed to connect. Thinking I had done all I could on my own I tried to look for support either through online documentation or a forum on setting this app but "the cupboard was bare". There is an old sketchy setting up a beta version for windows but that's it. Sorry chaps you must do better... ## Frequently asked questions about Acrosync ### How does Acrosync sync files? Acrosync utilizes the rsync protocol for efficient and reliable folder synchronization between your computers and iOS devices. It intelligently transfers only new, modified, or changed parts of files to save bandwidth and speed up the process. ### Can I access my files offline with Acrosync? Yes, all files synced with Acrosync are stored locally on your iOS device, ensuring you have constant offline access to your documents, photos, and videos even without a network connection. ### Is Acrosync secure for transferring files? Acrosync offers optional file transfer encryption to protect your data against unsafe networks. It also uses checksums for verification to prevent file corruption during transfer. ### What computers are compatible with Acrosync? Acrosync is compatible with Mac computers (requiring Remote Login enabled) and Windows computers (requiring openssh and rsync installation). It also works with popular NAS devices like QNAP and Synology. ### How much does Acrosync cost? Acrosync is a paid application, available for a one-time purchase of $4.99. The app does not feature in-app purchases or advertisements. ### How often is Acrosync updated? The latest version of Acrosync, 3.1, was released on April 13, 2015. While the app has not been updated recently, it implements a robust protocol for reliable syncing. ### What devices can I use Acrosync on? Acrosync is designed for iOS devices, including iPhone, iPad, and iPod. It is suitable for users aged 4 and above. ### Can Acrosync sync specific files or folders? Yes, Acrosync supports selective sync through advanced options, allowing you to specify include/exclude patterns. This enables you to sync only desired files and exclude others. ## Version history (last 5 releases) ### 3.1 — 2015-04-13 This app has been updated by Apple to display the Apple Watch app icon. • Fixed a bug that may causes two errors: "unexpected flag" or "the ssh channel has been blocked for more than 120 seconds" • Fixed video full screen playing ### 3.0 — 2014-10-29 • Implemented iOS 8 storage extension to allow files to be imported from or exported to other apps • Display thumbnails for images and videos • Files or folders can be downloaded or uploaded individually by long presses • Fixed 'Open in...' bug ### 2.3 — 2014-10-01 • iOS 8 compatibility fixes, including a bug that results in empty remote directory listing • Fixed a bug in include/exclude pattern matching • For symlinks, now sync the referent instead of the link ### 2.2 — 2014-09-11 • SSH private keys can now be entered via copy/paste or downloaded directly from a server supporting password login • Fixed bugs in include/exclude pattern matching ### 2.1 — 2014-06-06 • Optimized for iOS 7 • Bug fixes for full screen video playing, custom ssh port, and ssh login with keys • Add an option to propagate deletions • Can connect to rsync daemons ## Apps similar to Acrosync | App | Rating | Price | Category | | --- | --- | --- | --- | | [Möbius Sync Pro](https://appshunter.io/ios/app/mobius-sync-pro/id1671184333) | 4.2 (20) | $4.99 | Productivity | | [K.A.I](https://appshunter.io/ios/app/kai/id1460006720) | — | Free | Productivity | | [Your Ashford BC](https://appshunter.io/ios/app/your-ashford-bc/id1452979480) | — | Free | Productivity | | [CostX - Work & Cost Estimate](https://appshunter.io/ios/app/costx-work-and-cost-estimate/id1645196187) | 4.3 (6) | Free | Productivity | | [Mini Effect Gizmo X Editor](https://appshunter.io/ios/app/mini-effect-gizmo-x-editor/id1579790715) | — | Free | Productivity | | [SyncOnSet 5.0](https://appshunter.io/ios/app/synconset-50/id1460160860) | 1.8 (60) | Free | Productivity | ## More apps by Acrosync LLC - [PhotoBackup - Backup photos and videos via rsync](https://appshunter.io/ios/app/photobackup-backup-photos-and-videos-via-rsync/id945026388) All apps by Acrosync LLC: https://appshunter.io/developer/428846552 --- *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 2026-06-10.*