LCTankCircuit

With this app you can calculate one of the three values of your LC-tank-circuit. You only need to put two values and tap calculate-button and the app will calculate the third value. 

For capacitance unit (Farad), the app supports pF, nF, µF, mF, F, KF, MF, GF.
For inductance unit (Henry), the app supports pH, nH, µH, mH, H, KH, MH, GH.
For frequency unit (Herz), the app supports Hz, KHz, MHz, GHz.

You can change the units by tapping the unit-label.