When comparing AutoPy vs UserLAnd, the Slant community recommends UserLAnd for most people. In the question“What are the best ways to run Linux applications on Android?” UserLAnd is ranked 7th while AutoPy is ranked 13th. The most important reason people chose UserLAnd is:
If you need a X Session vnc gets started with a single click. No configuration needed. Usable on the android host or any other device capable of running vnc.
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Pros
Pro Open source and cross-platform
Pro Support for image processing
Functions for finding colors, and working with bitmaps.
Pro Allows Mouse & Keyboard control
Pro Simple
Made to be used in Python in an intuitive and easy way.
Pro Efficient
It's a thin-wrapper of code written in pure C.
Pro Support for X out of the box
If you need a X Session vnc gets started with a single click. No configuration needed. Usable on the android host or any other device capable of running vnc.
Pro No root needed
You get a full Linux environment without the need to root your device.
Pro Easy setup
No longer than 5 minutes and you have a full blown XFCE desktop running.
Pro Free and Open Source
Like Termux - UserLAnd is an entirely open source application - the developers are responsive on Github and actively working on the project.
Cons
Con Not supported below Lollipop
This is actually an issue with the programming and having to work around different architectures, but it still really stinks.