Well, they were for my own use, the QMDJ app specifically I couldn't upload update, as currently in it there are a lot of stuff from the JY event and it seems unfair to upload that like this... So it meant no more updates there as well... Although even now there are still some problems with the Zhi Run, the calculations are messy, but then I do find it more comfortable then most of the alternatives, as we could manually select Ju and other stuff that is usually missing in online calculators.
The android app has improved a lot, though, allows many years now and it has Zhi Run...
Has become so good, makes it pointless to make another one for android, not that I had plans for that...
The youtube lessons are using Chai Bu, though, I'm open to trying it out and that makes everything much easier, as its a lot easier to calculate...
Porting to android, doesn't seem likely... Bazi app isn't even in the forums now, I think, so will be moving in very unexpected direction...
It can happen, though, if something new comes out or if someone like the Xamarin peoples, decide to add more support for VB Net, but I doubt it.
There are a few more QMDJ books in English out there, Jack Chius and some more peoples... Although he calls it Ji Men Dun Jia, so searching QMDJ may not show it up.
I don't use Mei Hua in the usual way, so not sure I can benefit much of that, but it is good there is more sources about it now.