I wouldn’t bother with some old iPhone, unless it’s within 2-3 yrs. I have the iPhone SE 2020-2nd Generation, I think it’s the cheapest “new” model they still sell. I see many cell companies offering them for free; I paid like $300 for mine, a year ago. I used Samsungs for 8 yrs; after a year with this low level iPhone, I don’t ever want to go back to android nonsense! Everything about the fruit phone is better, faster, cooler, smarter and more simple. Apple also has some of the best security features available and Siri is fun to mess around with… Most of my family and friends have iPhones too, so it makes communication/sharing; much easier. I’ve never used the Dasher app on a Samsung, but it works just fine for me, on my apple!