If you've updated to iOS 11.1, whether you have an iPhone X or an iPhone 5S, you'll notice that Apple's Calculator app can't keep up with your calculations. That's a because a bug has seriously slowed it down so that operation buttons won't always trigger when you press them. Luckily, there's something you can do about it.
First, before getting to the fix, let's better explain what the iOS 11 Calculator glitch is, and that's best down with a few examples of some binary operations.
When performing mathematical calculations fast like you normally would, 1 + 2 + 3 would equal 24 instead of 6 because it won't register the second addition sign before you tap 3 and equals. Likewise, if you try to enter 5 x 2 x 3 quickly, you won't get 30, you'll end up with 115 after you hit the equals button.
If you use the iOS 11 Calculator a lot on your iPhone, then this is a huge deal. And if you can't wait for Apple to push out a fix for this glitch in a future update, there's something you can do right now to fix it — besides tapping realllllly slooooowwww.
Apple has already fixed this issue in the iOS 11.2 beta, and it's still working on the latest iOS 11.2 beta 2 version. Hopefully, Apple won't wait until the end of November to release this patch to everyone and will instead include it in an iOS 11.1.1 update soon, along with the fix to the "i" keyboard glitch.
But if you need a fix now, joining the beta program is your best option. You can join the beta program either as a developer or a regular user via the Apple Beta Software Program open to the public. To see how, check out our full guide on the process.
While you're better off just using the Calculator at a slower pace, you can also choose to use Spotlight Search to perform math calculations. To access it, just swipe down on the screen when you're on a home screen page.
It's not very fast at all since you have to switch between the numbered keyboard and the other characters, but worth mentioning nonetheless. This would only work better for you if you choose to install and use a third-party keyboard such as The Math Keyboard.
If you don't want to join a beta to fix a bug when you could possibly end up with more bugs throughout your system, and you don't want to use Spotlight with a third-party keyboard, then your last option is to just use another calculator app.
There are a ton of them on the iOS App Store, so just search for one that looks good and suits your needs. Obviously, you won't be able to use the Control Center shortcut to open it up, but you can't win at everything (except maybe math).
Some of the best-rated free ones in the iOS App Store include The Calculator, Calculator+ (which also hides photos and videos), and Calculator #. There are also more feature-heavy calculators that cost money, such as Soulver ($2.99) and PCalc ($9.99), but I'd only recommend those if you're taking advanced math classes or deal with mathematical equations like every day.