A calculator app is essential for anyone who works with problems that are too long or complex to solve manually. A smart calculator app that can do the work for you is also handy, so you can learn as you go.
Best Scientific Calculator Apps: iPhone & Android (What is the best scientific calculator app?)
Yes, the iPhone has a built-in calculator, and so does Android. But there are a number of third-party apps that are better suited to certain problems: they support everything from basic math to algebra, calculus, loan repayment, and more. Choosing the perfect app really depends on what you want the app to do.
If you’d rather write out the problem by hand yourself and let the app find the answer, that’s fine. Or maybe you’re dealing with a really long and complex equation and would rather have the app write it for you; just download one that can take a picture of the question. There are other use cases too, as you’ll see in this list.
Unlike a standard calculator app that requires you to manually type in the entire math problem, this app does it automatically: all you have to do is take a picture of the problem to get the answer.
