All in One Calculator guide
What Calculators Are Allowed in Exams?
No phone or tablet app is permitted in a formal exam, regardless of what it does. Most exam boards allow a basic or scientific calculator, and some allow specific graphing models with memory cleared. Always check your own board or institution, because the rules vary.
The short version
Phones are not allowed. Neither are tablets, smartwatches, or anything else with a connection.
This is not about what the app can do. It is about the device being able to communicate, which makes it impossible to invigilate.
So whatever calculator app you use for homework, it will not be with you on the day.
What is usually permitted
This varies by board, by country and by paper, so treat the following as the general shape rather than as your rules.
- Basic four-function calculators — almost always allowed where any calculator is.
- Scientific calculators — allowed on most calculator papers, sometimes from an approved list.
- Graphing calculators — often allowed at higher levels, usually with memory cleared before the exam.
- Calculators with symbolic algebra (CAS) — frequently banned, since they solve equations directly.
- Anything with a connection — never allowed.
Non-calculator papers
Many courses include a paper where no calculator is allowed at all, and it is usually the one students prepare for least.
That paper is testing something real: whether you can do arithmetic, spot factors, handle fractions and estimate without help.
The practical consequence is that some of your practice should be done without any calculator. If every problem you have ever done was checked by a phone, the non-calculator paper will feel much harder than it needs to.
How to practise so the rule does not hurt you
The order that works is: attempt, then check. Do the problem yourself first, then use the calculator to verify.
Doing it the other way round — reading the method and then reproducing it — feels productive and builds much less. You end up able to follow a solution but not to start one.
It is also worth doing timed practice with the actual handheld calculator you will be allowed. They have different button layouts and different quirks, and finding those out during the exam wastes time you cannot spare.
Where an app genuinely helps
The useful role of a calculator app is as a marking scheme you have with you.
It tells you not only whether your answer was wrong but where it went wrong, which is the part a textbook answer key cannot do. Comparing your working against a full worked solution line by line is how you stop repeating a mistake.
Used that way — after attempting, to find the divergence point — it makes you faster without the calculator, which is exactly what you need on exam day.
