Here I will explain you all the projects I have done with App Inventor

First one we have this named "Hello World" which is a very simple project I did to make the first contact with the app.

Here you can see the code of App Inventor

Later the second project I did was "Hand ABC" this was my first big project and it consisted in doing 50 photos of my hand doing the sign A, 50 doing B and 50 doing C in signs language and programme the app to recognize the sign you do and tell it.

Here you can see the code of App Inventor

The third project I have done consists in connecting two bluetooth devices one as server and the other one as client, the problem is that I have made the code and it's all alright but when I was with my teacher testing the app, we won't be able to connect his phone with mine and whe don't know why , he think it could be because of the operation systems of our phones that are not compatible.

Here you can see the code of App Inventor

The last project I have done is "Parrot" the idea is to connect two codes, the App Inventor one with one of Arduino and when you tell something like "turn led on", App Inventor take this sentence and transform it into an A which is sent to Arduino where that A means that the led has to turn on, so Arduino gives the order to the circuit of turn on the led. This could be used with anything but what I was trying is that. This project is not finished because we started doing an R project and I couldn't finished it but I post what I have done

Here you can see the code of App Inventor

The Arduino code I didn't have time to do it, it was the last thing I had to do