I have done the math. Swan offers the best place to buy bitcoin at the lowest price at any given moment. Compared it to Strike and FoldApp.

Plus, Swan's support staff is awesome. I've had to interact with them twice (because of my own stupidty, not because of their product or service). Both times were a shockingly pleasant experience. Usually I dread interacting with any tech support staff. With Swan, it was different- they were actually helpful and fast to respond.

Their interface (at least on the web, I don't use their mobile app so can't really comment on that) shows your Purchased Bitcoin Cost Basis very easily, as shown below, so you can quickly see whether you are Up or Down in your bitcoin purchasing dollar value, which is nice.