Single Question: optimized for smartphones All Questions: can be completed offline
In 2011, I created a site that allowed me to review flash card questions from my phone.
I have been using it continuously since then making improvements along the way.
I had always planned to enhance the site to
allow others to create their own flash cards, but it wasn't until the
shelter-in-place required by Covid-19 that I actually had enough free time
to make that happen. Now I'm making this site available to anyone without
any fees or advertisements. I hope you find it to be as useful as it has
been to me.