Streakline
A lattice Boltzmann wind tunnel that runs entirely on your phone.
Draw a shape with your finger, or import a photo of a sketch, and watch the flow solve around it in real time — velocity, vorticity and pressure fields, streaklines, and live drag and lift coefficients.
Support: email farrelkent@gmail.com and include your Google Play order ID (it looks like GPA.1234-5678-9012-34567) if your question is about a purchase.