A:AnswerWith a quick search of the App store, you will find Instax Share. Official app that can be used to print images from your iPhone or iPad to the instax Share SP-1/SP-2. It seems to also be compatible with iPod touch.
A:AnswerIphone 6 or newer will have no issues.
Only 1 size.
Film size (W×H) 54 mm × 86 mm 2.1 in × 3.4 in
Image size (W×H) 46 mm × 62 mm 1.8 in × 2.4 in
A:AnswerDepending on the "computer" I would say absolutely. Not sure if MAC is compatible but I have it on my tablet, cell phone and laptop. And I can print from an SD card or flash drive on my tablet/laptop.
A:AnswerYes! Make sure you are choosing the printer for the size film you want. There is one that prints on the mini film (rectangle), and one that prints on the regular, square, film.