Top Shelter Alternatives for Android App Isolation and Cloning
Shelter is a popular Free and Open-Source (FOSS) app that cleverly utilizes Android's 'Work Profile' feature to create an isolated space for installing or cloning apps. It's lauded for its commitment to privacy, offering no advertisements, tracking SDKs, or bundled statistics. However, Shelter's reliance on Android's Work Profile implementation means it can sometimes face issues with certain vendor or custom ROMs, like Xiaomi's MIUI, potentially causing crashes or even device bricking. Furthermore, it cannot create more than one work profile or co-exist with other work profile management apps due to Android system limitations. If you're encountering these limitations or simply looking for different features, exploring a Shelter alternative is a wise move.
Best Shelter Alternatives
Whether you're seeking more robust compatibility, additional features, or simply a different approach to app isolation and cloning, these alternatives offer excellent solutions to manage your Android apps effectively.

Parallel Space
Parallel Space is a Freemium Android application that excels at cloning and running multiple accounts of the same app simultaneously. It's a strong Shelter alternative for users who need to manage multiple social media accounts or gaming profiles on a single device, offering features like Multi Account Switching and Multiple Account support. While not open-source, its wide adoption and rich feature set make it a compelling choice.

App Cloner
App Cloner is a powerful Freemium tool available on Android and Android Tablets, making it a versatile Shelter alternative. It allows users to create and install copies of existing Android apps, enabling various use cases such as utilizing multiple logins for different apps. Its core features include Multi Account Switching and Multiple Account support, providing a robust solution for managing distinct app instances.

island
Island is a Free and Open Source Android application that provides a sandbox environment, much like Shelter, to clone selected apps and isolate them from accessing personal data outside the sandbox. It's an excellent Shelter alternative for users prioritizing privacy and data segregation, offering a similar approach to Work Profile management. Its open-source nature and focus on data isolation make it a highly recommended choice for security-conscious individuals, with a key feature being Multiple Account support.

AppClone
AppClone is a Freemium Android and Android Tablet app that enables users to clone apps and games, providing separate instances for secure personal use and public access. This functionality makes it a viable Shelter alternative for those seeking distinct environments for different use cases. It supports Multi Account Switching and Multiple Account support, offering flexibility for users managing various app profiles.
Each of these Shelter alternatives brings its own strengths to the table, from robust multi-account management to dedicated app isolation. Consider your specific needs regarding features, open-source preference, and compatibility with your Android device to choose the best fit for you.