Shelter is a free utility application developed by Paper Airplane Dev Team. This tool can help users install or clone applications inside a separate virtual space from the rest of their phones. They can set strict permissions, as well as run two accounts in the case of online services.

Similar to the way virtual machines like VirtualBox work, Shelter allows users to run and use applications isolated from the rest of the operating system. The benefits of this come in the form of increased control as it can block access to mobile data, identify misbehaving apps, and others.

Isolated instances

For developers, or even just average users, virtual machines serve as a good way to test out applications within a contained space separate from their OS. One major downside, though, is they require high RAM and capable hardware to run properly. Here then comes Shelter, an app that basically provides the next best thing, a virtual space that provides similar capabilities for your apps.

This app features a tabbed interface divided in two, with the first being the Main window where all your installed apps will be listed and selected. Once chosen, proceed to the second Shelter tab to manage and open them. You can Freeze them from running and consuming mobile data, or Clone them to use two accounts at the same time for social media, messaging, and the like.

Additionally, there is an Auto-Freeze feature, which as its name suggests, will freeze any chosen app even from outside. Just a couple of things to note before proceeding. The first is that you will need to grant Device Admin access to your device, and the second is that the app depends on your Android's Work Profiles to function. Also, you're still vulnerable to security breaches if not careful.

A great alternative

In conclusion, Shelter is a great alternative to virtual machines that does similar things without the high hardware requirements. It's easy to use and set up and offers various customization options to control your apps. Just know that it still has its limitations, but for what it does, it's worth giving it a try and seeing for yourself if it's for you. Recommended.