That feature is meant more to display a pretty minimal view on top of an app, than a full blown application. What Apple has done with its multitasking support at the OS level where secondary apps become first-class citizens for both split-screen and overlay is what I am talking about. For example, when you slide-out an app on iOS, it has a mechanism to slide to left side or right side or easily slide off and back on screen. It also has a mechanism to overlay or change to split screen and back. In the past for Android it seems like different manufacturers like Samsung would offer some level of split-screen support, but I had not seen overlay and each manufacturer did it differently. It does seem like Android now has something called picture-in-picture that may act similar to overlay in iOS. Our Android app was on an earlier version of the Android SDK that didn’t support, but we have recently upgraded it to there is now potential to support.
That said, there would still be a lot of effort, especially testing to pull off for Android given the plethora of devices they have. The reality is over 9 of 10 users that use MiraCheck are on iOS devices and similar to why a company as successful as ForeFlight has never supported Android. If it is made pretty easy to support and “just works” it is something we may support in the future, but no guarantees.