App on phone looks different than that on the inventor

I am new to this. I need to build an app to control a pair of motors and an actuator, so I made an interface, which looks fine on the computer, but when I test it on my phone, the screen only shows me half of the screen or nothing at all. Any help would be greatly appreciated!

Without an image of the issue and image of your Blocks, we can only guess.

Try the ‘magic’ control; set ScreenSize on the Designer screen Properties for Screen1 to Responsive. ScreenSize is probably set at Fixed.

If magic does not work, post some information about your app that will allow someone to provide specific advice.

Did magic work? If not, Here are some resources to help you learn to use the AI2 tools. A very good way to learn App Inventor is to read the free Inventor’s Manual here in the AI2 free online eBook … the links are at the bottom of the Web page. The book ‘teaches’ users how to program with AI2 blocks.

There is a free programming course here and the aia files for the projects in the book are here:

How to do a lot of basic things with App Inventor are described here: .

Also look here and here for more tutorials.


Hi Steve,

Thank you for replying. Apologies for not including images; I have uploaded them on Imgur and can be accessed through the link below. I checked screen properties and it was already set to Responsive, so I am not sure where exactly to go from here. Cheers!

PS: The app is meant to be horizontal.

What does it look like on your device (not the designer - the designer will not give an accurate representation of how the app will look on a phone/tablet)

A guess (without a screen capture of your device screen) this might work Universal Screen Size Using App Inventor

It looks the same

Thank you very much to everyone! I have fixed the issue by building it from scratch again while monitoring the phone screen with each step. I hope you all have a good day!

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