I've asked and discussed about various apps that I've come across that I thought might be either interesting or useful, or both, for someone in science, and in physics in particular. I still haven't found a data analysis and graphing app for my iPad that rivals, say, the Origin or any other full-blown computer program of that type. But I'll continue to search and keep an eye out for one.
I read about this "Google Science Journal" app before, but it appears that they've made significant improvements to it. It is available on both iOS and Android (of course). This app looks like it might be useful to high school science students, and maybe even in intro physics classes as part of a demo.
I'll probably install it on my phone and play with it for a bit to see what it actually can do. But if you have had some experience with this app, or better yet, have used it as part of a lesson, I definitely want to hear about it.