After Upgrade iOS 11, iPhone 7 calculator slow response

Just upgrade my iPhone 7 to iOS 11, then found out using the calculator function it become slow and poor response. All the button become slow response, I can’t touch too fast on all the calculator button function, if not it will miss the touch and won’t recieve and no response.

I miss the old calculator, it function much more smoother.

Posted on Sep 20, 2017 6:41 PM

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23 replies

Oct 3, 2017 5:52 PM in response to mcph6952

It’s very disappointing I’ve been loyal to Apple for a very long time and throughout the years the devices are getting bigger, bulkier, slower, it’s like after jobs they’re going the opposite way .... very disappointed, especially the new OS.... even the iPhone X is most likely a let down... thinking about switching

Oct 21, 2017 10:36 AM in response to Rysz

Seriously? Did you try it by yourself before suggesting a restarting? And even a label "Apple recommended".. Oh boy...


The calculator app is absolutely rubbish now and I can't believe apple didn't see it before releasing code that feels so amateurish... Is the app for kids? Are we next going to see some fancy bling-blings and maybe fireworks? Maybe adding a notch for the app itself to look more stupid?


It's just an calculator app! How hard is it to get it and make it to work? No one need animations which only make the app unusable and users make only errors when using it.

Oct 31, 2017 4:49 PM in response to Laukarchun

Restart doesn't fix


I've repro'd this across 6 devices and friends have verified it too. Still happening after iOS 11.1 upgrade.


Repro is easy: Do any calculation with more than one operator, and type reasonably fast.

1x2x3 will give a result of 23. Every single time.


If you type really slow you'll get the right answer.


It looks like there is a transition animation on the buttons and the animation is blocking click events.


Here's my FB post a month ago, video of the issue in the comments:

Jesse Kocher - Apple Inc. you broke the calculator with... | Facebook

Nov 15, 2017 9:30 PM in response to Laukarchun

Issue occurred on IOS 11.0.0 beta 1 to official IOS 11.1.1(15B150)-iPhone 5s. The pre-install calculator app on IOS 11 has very long delay animation when taping on the math operations or equal sign. The delay is long enough that it doesn't recognize next taps by user. The purpose of the animation is to highlight buttons when tap on numbers. To solve this error, Apple should reduce animation time. Make it snappy Apple! I don't wanna use 15th century app!

Nov 23, 2017 7:57 AM in response to Laukarchun

This is not an issue just for older phones upgrading to IOS 11. I tried a friend's iPhone X, and the calculator is just as sluggish as my 6+. The issue is IOS 11 calculator is inherently sluggish. I have switched to a 3rd party calculator (lots of free ones available), and that solves the problem. But iPhone users should not have to do this to get around Apple design failures.

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After Upgrade iOS 11, iPhone 7 calculator slow response

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