What kind of power adapters and converters will I need to buy for my upcoming trip to Iceland?

I'm coming from the USA, and I will only need to plug in my iPhone and my hair straightener. Links appreciated.

Iceland uses the F plugs, with two round prongs. You'll need just the adaptor plug for your iPhone- it's dual voltage. You'll need a converter for the hair straightener. That's more expensive, and quite frankly, it doesn't always work. You may fry your hair straightener. There are a couple of better options- buy one when you get there, which won't necessarily cost much more than the convertor, or let your hair go natural.

https://www.power-plugs-sockets.com/iceland/