Timey lets you record your time spent on trello cards and then mark your timesheets as invoiced.
It's built with Electron and Angular 5 and based on this repo.
After cloning you'll need to rebuild osx-mouse using your version of node. Run the below commands in the ./node_modules/osx-mouse and ./dist/node_modules/osx-mouse directories:
node-gyp configurenode-gyp rebuild --target=1.7.8 --arch=x64 --dist-url=https://atom.io/download/atom-shell
Make sure the --target property has the correct version of electron from package.json.