Things aren't adding up as the iOS 11 calculator is giving the wrong answers

If you're thinking about using the calculator application from your iOS 11 powered device to handle some important calculations, you might want to rethink your plan. A bug that affects the stock calculator in iOS 11 is handing out the wrong answer. Apparently a short series of inputs is enough to make the calculator think that it is a messaging app, or just about anything but a calculator.

Check out the bug yourself by adding the following numbers, 1+2+3. Hit the equal sign and you should get 6 as the answer. But if you enter the numbers too quickly, you just might come up with the incorrect answer of 24. The reason why this happens has to do with the animations used by the calculator. When you input a number by pressing on a button in the calculator app, the button lights up to confirm that you pressed the correct number. But an input won't register unless the previous animation is completed. Thus, if you are tapping in numbers too fast, certain key presses won't register.

Apple already knows about the bug. Company employee Chris Espinoza said in a tweet that there have been more than 70 complaints about the iOS 11 calculator issue. Eventually, we would expect Apple to fix the problem. Until it does, you can use the calculator app by entering numbers slowly. Or, you can head to the App Store and pick up a third party calculator for your iOS device.


source: @theloop

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39 Comments

1. Podrick

Posts: 1283; Member since: Aug 19, 2015

You're calculating it wrong!

7. submar

Posts: 713; Member since: Sep 19, 2014

"You are typing it wrong" is more accurate.

12. Valinor

Posts: 169; Member since: Mar 26, 2013

"It's a feature"

2. Back_from_beyond

Posts: 1158; Member since: Sep 04, 2015

What an utterly retarded bug, making animations more important than accurate answers.

13. Settings

Posts: 2942; Member since: Jul 02, 2014

Who would add 1+2+3 and accidentally discover the bug?

15. mcdanielvzw

Posts: 48; Member since: Nov 10, 2016

You're missing the point, that's just the easy example. Could probably happen simply by entering anything too quickly because it is expecting slower input to allow for the animation.

20. uncle_gadget

Posts: 1050; Member since: Sep 20, 2017

They didn't, It was a simple way of showing the bug. Come on dude. Are you really that dense? I mean please tell me you aren't?!

25. Settings

Posts: 2942; Member since: Jul 02, 2014

It was meant to be a pun. Jeez.

33. sgtdisturbed47

Posts: 960; Member since: Feb 02, 2012

Glad I don't use iOS 11, I'm keeping iOS 10.2 until there's a jailbreak for 11.

38. Nabil111

Posts: 105; Member since: Apr 14, 2014

someone probably was doing real math and got suspicious and then found it works on something as simple as 1+2+3. Reminds me of Ingress, and all the people that would wait for the godawful animations to complete that were just there to buffer user input from spamming the AppEngine servers, but you could just hit the back button to escape them and speed through.

3. Wiencon

Posts: 2278; Member since: Aug 06, 2014

This bug is pretty old, it's present on 10 and earlier

5. afrohoxha

Posts: 206; Member since: Mar 13, 2014

It just works!

21. uncle_gadget

Posts: 1050; Member since: Sep 20, 2017

Until it doesn't. And then you have to cut corners to make it work.

8. kanagadeepan

Posts: 1207; Member since: Jan 24, 2012

Nothing new here. Apple always prefers form over function...

9. kartik.07

Posts: 73; Member since: May 04, 2015

It is calculating right but animations are too slow (really f**king slow) so it doesn’t register + in between 2+3 that’s why its gives the wrong answer. It could be easily fixed by them they just have to speed up the animation in calculator

11. japkoslav

Posts: 1373; Member since: Feb 19, 2017

Better solution input > animation.

23. uncle_gadget

Posts: 1050; Member since: Sep 20, 2017

How about no animation.

14. blackwildboar84

Posts: 14; Member since: May 13, 2017

3rd party calculator alarm works like charm if not bring a calculator or clock separately

16. nikhil23

Posts: 414; Member since: Dec 07, 2016

so basically lag covered by animation

17. trojan_horse

Posts: 5868; Member since: May 06, 2016

More like animation covering lag.

18. trojan_horse

Posts: 5868; Member since: May 06, 2016

But yeah, it's the same thing anyways. Apple uses animations to hide lag in iOS, it isn't a new thing.

27. Nopers unregistered

Have you actually used iOS? If you open a large game in iOS the animation will start immediately whereas on Android it will always hang or you know.... opening Bixby home for example. Are the animations too long? Maybe. The animations are there ensure a smooth and uniform experience.

29. tedkord

Posts: 17093; Member since: Jun 17, 2009

They're there to cover lag. It's what they've always been there for.

19. L0n3n1nja

Posts: 1511; Member since: Jul 12, 2016

Only Apple is bad enough at software development to screw a calculator up

22. uncle_gadget

Posts: 1050; Member since: Sep 20, 2017

So the animation has lag. The timing for the animation is to slow for how fast people type. Is this why when you type so fast on virtual keyboards, they lag out? Because it happens on every brand of phone I've used. You type so fast the animations start to lag the keyboard because they can't finish fast enough because the animation shows the character raise/light up to confirm what you press. If so then ALL OEM's need to deal with that issue, because it is an issue on all products. Because OEM's do use animations to fill the gap of what you doing and when you request a task to fill that gap of time to change.

24. NarutoKage14

Posts: 1297; Member since: Aug 31, 2016

It's "LAG", plain and simple.

26. Mr.Pussy

Posts: 348; Member since: Feb 16, 2017

Ho! Ho! Ho!

28. zackh121556

Posts: 131; Member since: Feb 01, 2012

this must be how they calculated the price of the iPhone X!

32. Dingy_cellar_dweller

Posts: 339; Member since: Mar 16, 2013

That's what I was thinking

30. tedkord

Posts: 17093; Member since: Jun 17, 2009

This is because the A11 is so powerful, it makes everything four times bigger, even 1+2+3

* Some comments have been hidden, because they don't meet the discussions rules.

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