Does this require plugging phone into to a computer? When I want to screenshot a stock, I don't want to mess with all that on the go. If I'm going to need a com

Does this require plugging phone into to a computer? When I want to screenshot a stock, I don't want to mess with all that on the go. If I'm going to need a computer, I'd just take the screenshot from there... I guess my other choice is to carry two phones so I can take a photo of the screen... I thought it was my phone, afraid not.