We provide 4 different apps for different measurements. Depending on the version of the Dropometer you ordered, you can find one or more of the apps installed in the smart phone.
Pendant App: Measure the surface tension of liquids and interfacial tension between immiscible fluids.
Sessile App: Measure the contact angle (including static, advancing and receding contact angle) between a liquid drop and solid surface.
Tilting App: Measure the sliding angle of a drop with a solid surface.
Energy App: Measure the surface free energy of a solid surface.