HomeAppsMusic & AudioHeadphone CalculatorApps like Headphone Calculator Here are some great alternatives to Headphone Calculator by Rob Robinette : Resistor ratio calculator ★3.2 Electronics Toolbox Pro ★4.7 Electronics Toolbox ★4.6 Electrical Calculations ★4.3 Electronic toolbox ★4.2 Electronics Toolbox ★5.0 Resistor Code Calculator ★4.5 Headphone Volume Booster ★4.3 Volume Booster for Headphones ★4.6 Headphone Volume Booster ★3.5 Sound Booster For Android ★4.1 Audio Booster. Booster Speaker ★4.5 Electronics Tools: ElectroCalc ★4.1 Ohm's Law Calculator ★4.0 Headphones Volume Booster ★4.5 Volume booster Sound amplifier ★4.3