For an iPhone XS. I really want a wristband, not armband so that I can just look down when I need to see my phone. I tried one I found on Amazon but my phone kind of flopped around a bit while running so it was returned.
I usually don’t post here, but I have this One from Lifeproof. Technically, it’s an arm band, but it comes with several size bands. I would think the small one would make a good wristband. I like that it isn’t a pocket for the phone and you can easily unmount it. The design is solid and the phone is secured by a magnet. I run, hike, kayak and just go on everyday errands with it on. I have had mine for 3 years of continuous use and it’s still going. MH had one for a couple years and it broke. We called their customer service and they sent another one, no questions asked.
Bonus - you don’t need to buy a new case if/when you get a new phone. I’m on my 3rd phone with the same band. Just buy a replacement magnet and you’re in business!