Now OneFeed is using Trello to track bugs and plan features, though it’s a tiny application in any respect. A nice thing of having a bug tracking system is that history is logged, which can be used for future reference.
Trello is a simple tool to create/manage boards, lists, and cards. And based on these basic elements, one can build his/her own workflows.
Trello has a free plan, which is enough for OneFeed to track its bugs. The free plan allows users to add one Power-Up (add-on to extend Trello’s capability) per board. For OneFeed’s boards, Custom Fields Power-Up is added, so that cards can have custom fields like “Bug ID” and “Feature ID”, which can be used for example in Git commit messages.
Also Trello has mobile apps for accessing from anywhere :)