Island is described as 'Sandbox environment to clone selected apps and isolate them from accessing your personal data' and is an app in the security & privacy category. There are more than 10 alternatives to Island for a variety of platforms, including Android, Android Tablet, F-Droid, Mozilla Firefox and Web-based apps. The best Island alternative is Sandboxie Plus, which is both free and Open Source. Other great apps like Island are Shelter, Firefox Multi-account Containers, Insular and Hail.
Sandboxie Plus creates a sandbox-like isolated operating environment in which applications can be run or installed without permanently modifying the local or mapped drive.
Sandboxie Plus is the most popular Windows alternative to Island.
Sandboxie Plus is the most popular Open Source & free alternative to Island.
Shelter is a Free and Open-Source (FOSS) app that leverages the “Work Profile” feature of Android to provide an isolated space that you can install or clone apps into.
Almost everyone thinks Shelter is a great Island alternative.
Shelter is the most popular Android & Android Tablet alternative to Island.
The Firefox Multi-Account Containers extension lets you carve out a separate box for each of your online lives – no more opening a different browser just to check your work email! Here is a quick video showing you how it works.
Firefox Multi-account Containers is the most popular Web-based alternative to Island.
Sandbox environment to clone selected apps and isolate them from accessing your personal data (fork of Island with closed source parts removed).
Hail is a free software that allows users to freeze unnecessary Android apps to improve device performance and save power.
It is not about having an isolated storage or atleast parallel space, it has a different properties and was made specifically to hibernate, hide, or disable apps not cloning
Easily open disposable containers that isolate attached data and are deleted after usage: Fully automatic, based on navigation-target, for certain websites, with configured mouse clicks on links or just by using the toolbar icon.
Samsung Secure Folder lets you put to use the power of defence-grade Samsung Knox security platform to protect your files with a private, encrypted space on your phone. Apps and data moved to Secure Folder are sandboxed separately on the device and gain an additional layer of...
Safely use sensitive data with online tools. Browser extension to cut-off network access to a website to prevent it from phoning home. This allows you to input sensitive data into a website without worrying about it being stolen.
Parallel Space lets you clone and run multiple accounts of the same app simultaneously, and use themes to style your unique space.
App Cloner is a specialized tool that lets you create and install copies of your existing Android apps so you can do things like utilize multiple logins at various apps such as Facebook and Skype.
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It is Free and Open-Source app.