Stun guns
this post was submitted on 15 Feb 2025
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Another light-emitting device: laser pointer. I don't know of a phone that comes with an LED laser; it's probably only a matter of time, but even then it'll probably be - like a lot of other things - a handy-to-have-in-an-emergency app, but not a practical substitute for a real laser.
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Flashlights. Again, in an emergency, you can use your phone. But it's not as good as a real flashlight, and I always carry and use a flashlight.
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I'll answer my own question, "Fans". You can absolutely buy a small fan or even one you can wear, but a smart phone can't blow air to cool a person down.
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While it's not an electronic device, my wife says makeup mirrors. Yes, you can reverse the camera and use your phone as a mirror, but she says it's not as good as a real mirror.
Phone cameras are kind of useless for makeup. It's just good for checking if your hair and lipstick are in place, also if you have food on your chin.
Pocket knife. Although I wouldn't be surprised if there's a phone case out there with a box-knife-like insert for a razor blade.
...infact, brb.
Professional work tools come to mind. Laser measures, camera gear, flashlights, 3D scanners, calculators, synthesisers, etc. Sure, there are apps that offer the same functions, but they usually lack the precision and reliability expected from professional tools. There are also some great gaming devices (such as the Analogue Pocket) that probably offer a better experience over gaming on a smartphone.
I'm posting these separately so people can argue about specific devices.
A calculator is still better than a phone in a lot of cases. I haven't yet met a financial advisor who uses their phone instead of a calculator. It's often the same issue as with keyboards: touch screens are simply vastly inferior to tactile keys. Few people are willing to carry keyboards around with them, but for those who use calculators a lot, for many it's worth having a portable, dedicated device.
I did machining inspection for a while and would be dealing constantly with hundreds of data points. Using the table functions on my TI-84 was a godsend. Everyone was writing answers down and transcribing when I joined.
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Cameras. You can take pictures with your phone, but despite Apple's advertisements, a phone camera will never produce anywhere near the same quality a dedicated digital camera with interchangeable lenses. And neither are as good as film.
I would add that even though you can slap a filter on a pic you won't get the same quality of lighting as utilizing reflectors, diffusers, lamps, etc.
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