If you specifically need a scientific calculator,here are some alternatives:

It seems like you're referring to an app called "Firefly" that is a desktop calculator. However, "Firefly" is not a scientific calculator; it is a basic desktop calculator. If you're looking for a scientific calculator, you might want to consider other apps like "CalcX" or "MathType" for more advanced mathematical operations.

1. CalcX: A command-line calculator that supports more advanced mathematical functions.
2. Wolfram Alpha: A computational knowledge engine that can perform scientific calculations.
3. Desmos Calculator: An advanced graphing calculator that also supports scientific functions.
4. Microsoft Mathematics: A free downloadable calculator that includes a scientific calculator.

If you have any specific needs or questions about using these alternatives, feel free to ask!