We build careful, honest tools for the things that matter to you. One studio, a growing family of apps - Starchart for your dot journal - and music, made by humans, free for your stream. And something new on the way.
Our philosophy
Greatness is a choice
We build software the way it should be built: carefully, honestly, and with respect for the people who trust it with the things that matter.
Every Southlight I/O app is measured against the same guiding light - be transparent, stay in the user’s control, and never treat their data as anything less than precious.
Greatness is a choice. We make it every day.
What we make
Apps
Starchart
Chart your dot journal page before you ink it. Counted layouts sized to your exact notebook.
Learn more →
Coming to the Microsoft Store soon Constellate
Photo sorting that shows you the plan before it moves a thing. Years of photos put in order on your own computer, with nothing uploaded anywhere.
Take a look →