RF and Microwave line calculator includes so far:
1) Rectangular waveguide - cutoff frequency calculations,
2) Microstrip line - analysis and synthesis,
3) Load impedance calculation,
4) Impedance transformation,
5) VSWR calculation,
6) Impedance matching - single stub matching circuit,
7) Impedance matching - L-section matching network.
The app is FREE, with NO ADS inside.
Please feel free to contact me (firstname.lastname@example.org) if it doesn't work on your device or you have any suggestion what to add.
This app is made with the use of MIT App Inventor: appinventor.mit.edu