My daughter likes to make flash cards for her school work. I like to watch reaction videos of Americans speaking fluent Chinese to Chinese people. Which led me to a video about learning languages. Which led me to a video about people learning anything. Which led me to hear about Anki. Which brings me back to the first sentence. You don’t have too but you can sync to the cloud the sync to your android phone (free in my case)…or vise versa. It seems the iPhone app is $25…ouch! Seems very useful and lots of YouTube tutorials.