https://play.google.com/store/apps/details?id=io.sanford.wor...
https://github.com/psanford/wormhole-william-mobile
One disadvantage is that current magic wormhole doesn't support resume but they plan to implement it.
Another app that you might have heard of is croc, but it doesn't seem to be secure:
https://news.ycombinator.com/item?id=27056746