This is the most stable and bug-free version available.
Accessing advanced functions without buying the hardware. Top Features of the fx-991ES Plus casio scientific calculator fx-991es plus free download
While there isn't an "official" app titled exactly "fx-991ES Plus," several high-quality simulators exist on the Google Play Store and Apple App Store. Look for "Scientific Calculator Plus 991." This is the most stable and bug-free version available
The EX includes a basic spreadsheet function which the ES Plus lacks. casio scientific calculator fx-991es plus free download