Pinboard bookmarklet to automatically open Pushpin app on iOS and regular popup on Mac.

bookmarklet.js

javascript:if(/(iPad|iPhone|iPod)/g.test(navigator.userAgent)){window.location="pushpin://x-callback-url/add?url="+encodeURIComponent(location.href)+"&title="+encodeURIComponent(document.title)}else{q=location.href;if(document.getSelection){d=document.getSelection()}else{d=""}p=document.title;void open("https://pinboard.in/add?url="+encodeURIComponent(q)+"&description="+encodeURIComponent(d)+"&title="+encodeURIComponent(p),"Pinboard","toolbar=no,width=700,height=350")}

readable.js

if (/(iPad|iPhone|iPod)/g.test(navigator.userAgent)) { // Open Pushpin
    // on iOS
    window.location = 'pushpin://x-callback-url/add?url=' + encodeURIComponent(location.href) + 
                      '&title=' + encodeURIComponent(document.title);
} else { // Everywhere else open the normal Pinboard panel, you may replace
    // this code with the code of the Pinboard bookmark you prefer
    q = location.href;
    if (document.getSelection) {
        d = document.getSelection();
    } else {
        d = '';
    };
    p = document.title;
    void(open('https://pinboard.in/add?url=' + encodeURIComponent(q) +
              '&description=' + encodeURIComponent(d) +
              '&title=' + encodeURIComponent(p),
              'Pinboard',
              'toolbar=no,width=700,height=350'));
}