Because most Android devices lack proper screens, precision writing with things such as Jot Pro do not work. Your best bet for precision writing with Android is to get a Thinkpad x220 tablet or similar. More about this here. I use Maglus stylus in Android devices because the precision tools do not work. Then I use finger-writing tools below, free and good enough to have an old Android phone for casual uses such as finding certain Greek alphabets.
Apps with Finger-writing
The apps below do not work with precision writing with Jot because most Android devices do not have good-enough display. Currently, the only way to test whether Jot works with a display is to test it: even certain better-than-retina-displays do not work with Jot.
I. Detexify here
II. OCR MyScript -calculator here
I use Gooseneck 1/4, Balljoint 1/4 and camera-phone-mount here to have my hands free while working with things. Sometimes, I use a macro flash for near-photographs with a DSL camera for very precise photographs. Phone-camera works however for casual photos such as note-taking.
P.s. For future, there is a software called Screenshot UX here for sharing sheetshots in Android devices but it requires rooted phone. By this tool, you can easily show and recommend apps.