I find myself checking the prices on my phone often, of course, I won't panic sell but I was just wondering what's the best/simplest portfolio app? (I use Android).
There's blockfolio and delta on android, you can check both and see which one you like the most. I used to use blockfolio before switching to delta, if you have a lot of tokens on etherdelta/forkdelta then it's best to use delta as the price on blockfolio will spike a lot. Delta also support more smaller exchange, and i think the ui is better.