Revision is where a phone quietly ruins you: you unlock it for one value and surface twenty minutes later having answered a message instead. A scientific calculator does the narrow job — trig, logs, powers, roots, fractions, statistics — and nothing else, which is the point. It's also the shape an exam hall expects: phones stay outside, while a plain scientific calculator is usually on the permitted list — though your own school or university publishes that list, and theirs is the one that counts. Learn its key order now, not on the morning of the paper.
— The Ghalyh team · How we pick
Good for
High-school maths and physics revision · first-year university coursework · lab reports and statistics homework
Not for
Courses that require a graphing or programmable model — that's a different class of calculator, and the syllabus names it outright. And for adding invoice columns, a big desktop keypad is far less fiddly.
Specifications
- Model
- Casio fx-991EX
- Type
- Scientific — trig, logs, powers, roots, fractions, statistics
- Exam use
- The plain scientific class; check your own institution's list
Questions people ask
Will they let me take it into the exam?
That's the invigilator's list, not ours, and it's published before the exam. A plain scientific calculator is the usual permission; a phone is never one. Check the list for your paper.
Scientific or graphing for university?
Start with what the course requires. Most first-year maths, physics and chemistry work needs trig, logs and stats — this class. Graphing models get asked for by name when they're needed.