@gearmaid - Thank you! Absolutely great to hear, glad you get good use out of it!
@GoBlue - Great question, and now that it's on the iPad, yes, an Android port is next on the list.
@FlyJSH - The iPad version has four components or tabs - Burn to Destination (for fuel burn, generally holding point to destination), where groundspeed, fuel flow and distance are entered.
Calculate Bingo, where reserve, alternate fuel, burn to destination and safety margin are entered, resulting in the Bingo number.
Time to Hold, where Fuel on Board, Fuel Flow and Bingo Fuel are entered, resulting in number of minutes you can hold.
And, finally, EFC Time, where Time To Hold, Holding Fix Arrival Time and given EFC time are entered, with the result displayed plus or minus the EFC time (e.g EFC +8 or EFC -6.)
Relevant values are also auto filled between tabs - burn to destination -> auto filled to the Calculate Bingo tab, Time to Hold result auto filled to EFC Time tab, etc.
Thanks for the questions and the interest!
Take care,
ChiSoxFlyer