TouchID feels "broken" to me everytime i have to use it on my iPad or Macbook.
I feel like it's breaking my flow, while FaceID just happens. Especially when using Apps with FaceID/TouchID lock.
Face ID still requires a swipe up motion, something Touch ID did not.
I'm mixed on my feelings about Face ID. It is clear it's still in the first stages of its technology and version 2 will be far superior, because when using it at an awkward angle, groggy in the morning, or out in supreme brightness it can be very dodgy. Touch ID was also a much simpler experience (put a finger on this button is something Luddite grandparents can understand) and likely unlocks faster as a process than Face ID, especially if you remove the animations when it comes to unlocking, but the speed is relatively close regardless so they aren't that much better than the other at that.
Face ID works pretty well most of the time, much like Touch ID version 1 did. I have issues with Face ID in terms of how to angle my phone, I feel like the whole phone screen itself should be reading the face data, because aiming at the one notch can be tricky to do in some circumstances, especially just waking up in the morning. Not going to be possible anytime soon, but I think that might be a more convenient all around in terms of having to unlock your phone straight ahead instead of any other angle you might have your phone oriented in.
I don't think Touch ID more or less secure than Face ID, but it probably is, however I didn't encounter many incidents of people cracking Touch ID — but it doesn't mean people didn't do it. The security measures behind both technologies are both pretty solid so I don't think either/or is better than the other at being secure in traditional consumer use cases.
It's impressive how good Face ID can be when you turn off attention, though, it still relies on the phone at a perfect horizontal angle (you cannot unlock at other angles unlike the new iPad Pro does) whereas Touch ID can be unlocked holding the device at any particular situation. For example, I would often check my notifications quickly with the phone angled just barely out of my pocket with Touch ID, but now I'm unable to do that as it involves me holding the phone front and center ahead of my face. It's a little more inconvenient for some circumstances is ultimately the complaint people have about Face ID vs. Touch ID, not so much the ineffectiveness of the technology.
With the MacBook Air bringing Touch ID back from the dead, it could be possible to put it back under the screen in a future iPhone model with either security measure being available to from us to choose from — that would be the ideal future in my opinion.
I've been using Apple devices for a while and really I think people are not realizing just how good Touch ID version 2 was. It didn't need to be thrown out, it was just primarily replaced because Apple couldn't viably place it under the screen because they wanted an all-screen device, it wasn't because of any security holes or inefficiencies. It is still extremely good technology.
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