Position popup at bottom of screen

Please check other threads, sometimes, the solution is in it or maybe continue in this thread so they also can see your updates :)

https://community.bravostudio.app/c/bravo-tags/fixed-modal-unwanted-extra-bottom-padding-on-android#comment\_wrapper\_11111491

Yes there is a workaround cheat, make a popup of full frame of your mobile screen, they make the upper part invisible by remove the "fill" of that part. Could be done like:- Header container will have rectangle with no colour, bottom part will have that container which will contain your popup elements. 
This way always your popup will be at the bottom.

Hi Divyansh,

Thanks for your reply.  I think I've done what you said.  Two frames inside a full frame.

This makes the popup content appear towards the bottom of the page if the screen is the same as my full frame.  But this doesn't work for screens of different sizes.

Am I doing it wrong?

I have tried this bottom popup on my app as well and on different android screen, and there was a little gaps but not too much to hinder my design.
I think you can try aspect ratio if you want if you are looking for exactness in your design. Maybe this would work.
But yes little bit of changes can occur but not a major one.

Sorry, I'm new to figma - what does try aspect ratio mean please?

Its alright brother, am not an expert either :)
And here's all you will need to add the [aspect:ratio] tag.

https://docs.bravostudio.app/bravo-tags/containers/aspect-ratio-relative-to-screen

Hope now every 
issue of yours will be solved