Apps like RC E-Calc Pro

Here are some great alternatives to RC E-Calc Pro by Graham Dyer :
RC Tools
RC Tools
★4.1
RC Flight and Battery Log
RC Flight and Battery Log
★4.8
Battery Pack Calculator - DIY
Battery Pack Calculator - DIY
★4.8
BatteryOne: Battery
BatteryOne: Battery
★4.2
Battery Charging Monitor
Battery Charging Monitor
★3.9
Battery Charging Monitor Pro
Battery Charging Monitor Pro
★4.5
Battery Calculator
Battery Calculator
★4.1
Battery Guard
Battery Guard
★4.1
3C Battery Manager
3C Battery Manager
★3.9
RC Flight and Battery Log
RC Flight and Battery Log
★4.6
Battery HD Pro
Battery HD Pro
★4.6
Battery HD
Battery HD
★4.5
RC Speed Calculator Pro
RC Speed Calculator Pro
★4.9
Ampere Battery Info
Ampere Battery Info
★4.0
Accu​Battery
Accu​Battery
★4.6
Battery Monitor
Battery Monitor
★3.7