Show HN: HN for Ethereum directly on the Blockchain Posted by tomw1808 on Sunday July 10, 2016 @03:14PM from the show-hn dept. https://tomw1808.github.io/Freshdapps/#/ ( 2 comments | 3 points | on HN )
It needs gas only when there is a change (add/remove), it doesn't need gas to read.