No credit card. No obligation. Just download and go crazy for 7 days.
( Works on Mac OS 10.7 and above and Windows 7,8 and 10. No mobile version at the moment.)
To start a 7-day free trial, just download the app by clicking the button above and then double-click the installer. No sign-ups. No email required. No 'nuthin, except seven days to make some awesome simple diagrams.
Read about bug fixes and new features here: Product History
Behind the scenes, SimpleDiagrams uses Adobe AIR to make it easy for me to make a great cross-platform app. So if you want to know the base system requirements for SimpleDigrams, please review Adobe AIR's system requirements.
I love Linux. I want to publish a version for Linux. Please email Adobe and ask them why they dropped Linux support for AIR.