Apple Pay iOS in app payments : <p>I am looking at integrating a payment mechanism into an app. </p>

<p>I have used stripe and Apple Pay and can successfully take payments.</p>

<p>My question is do all Apple iPhones support Apple Pay? </p>

<p>Is having just Apple Pay sufficient or do I need another system if Apple Pay is not available on some devices? </p>

<p>What is the best way of approaching this?</p>
