This app is used to calculate RL filter. It is suitable for hobbyist or electronic engineers. Features: 1. Calculate cutoff frequency by resistor and inductor values 2. To find out combinations of resistance and inductance making a desired cutoff frequency 3. Save all combinations in a CSV (Excel) file 4. Use preferred values of resistors and inductors Features in PRO version only: 1. Can use preferred value 1% for resistor and 5% for inductor 2. No Ads 3. No limitation Note : 1. For th