How are these applications made?

Question

Android

I went to the play market, and randomly stumbled upon such applications.
I don't understand what they are made of. On engines like Unity or in AndroidStudio
Of course, you may not know either)) But from personal experience, how do you think you would do it yourself?))
For example, like a game, in a kind of application
https://play.google.com/store /apps/details?id=com....

Here are more
https://play.google.com/store/apps/details?id=com....

https://play.google.com/store/ apps/details?id=com....

Answer 1

If there is no real three-dimensional graphics, then on anything. It may be a framework you don't know.
But what will be your answer? Let's say you find out that this is a half-game, half-application made with the Unreal Engine. It's a strange decision, but that's how it turned out. What's next? Run to study this engine?
Whoever does what on what, it is better to think with your head when making a decision, and not just do "like they do." Still, it was all right to see how the application is arranged, and take ideas, with an understanding of why and why it was done this way. And why the developers chose this particular engine, and not another, they will not tell you until you get to know them.
And you will probably not have a 100% clone (although who knows), but a different application, so the decision will be based on other initial data. Even if a clone, then why copy an unsuccessful solution?
Therefore, proceed from the specific task that you are doing. It has specifics, on which not only the choice of architecture depends, but also all subsequent decisions.

Answer 2

These can also be found at https://github.com/flame-engine/flame