diff --git a/src/pretix/base/templates/pretixbase/email/base.html b/src/pretix/base/templates/pretixbase/email/base.html
index ef8809ac1..43a14a5d9 100644
--- a/src/pretix/base/templates/pretixbase/email/base.html
+++ b/src/pretix/base/templates/pretixbase/email/base.html
@@ -4,7 +4,7 @@
 <html>
 <head>
     <meta charset="utf-8">
-    <meta name="viewport" content="width=device-width, user-scalable=false">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <style type="text/css">
         body {
             background-color: #eee;
diff --git a/src/pretix/presale/templates/pretixpresale/base.html b/src/pretix/presale/templates/pretixpresale/base.html
index ba10209a1..3c6b5ed84 100644
--- a/src/pretix/presale/templates/pretixpresale/base.html
+++ b/src/pretix/presale/templates/pretixpresale/base.html
@@ -18,7 +18,7 @@
     {% include "pretixpresale/fragment_js.html" %}
     <meta name="referrer" content="origin">
     {{ html_head|safe }}
-    <meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=0">
+    <meta name="viewport" content="width=device-width, initial-scale=1">
     {% block custom_header %}{% endblock %}
     {% if settings.favicon %}
         <link rel="icon" href="{{ settings.favicon|thumb:'16x16^' }}">
diff --git a/src/pretix/presale/templates/pretixpresale/event/seatingplan.html b/src/pretix/presale/templates/pretixpresale/event/seatingplan.html
index 33dc3a12b..809e7adc5 100644
--- a/src/pretix/presale/templates/pretixpresale/event/seatingplan.html
+++ b/src/pretix/presale/templates/pretixpresale/event/seatingplan.html
@@ -16,7 +16,7 @@
     {{ seatingframe_html_head|safe }}
     {% include "pretixpresale/fragment_js.html" %}
     <meta name="referrer" content="origin">
-    <meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=0">
+    <meta name="viewport" content="width=device-width, initial-scale=1">
 </head>
 <body class="full-screen-seating" data-locale="{{ request.LANGUAGE_CODE }}">
 <form method="post" data-asynctask
diff --git a/src/pretix/static/pretixpresale/scss/main.scss b/src/pretix/static/pretixpresale/scss/main.scss
index 379161fa3..c4655a7bb 100644
--- a/src/pretix/static/pretixpresale/scss/main.scss
+++ b/src/pretix/static/pretixpresale/scss/main.scss
@@ -59,6 +59,13 @@ html {
     font-size: 1em;
 }
 
+@media (max-width: $screen-xs-max) {
+    /* scale everything to 1rem so older/smaller iPhones do not zoom inputs on focus */
+    .form-control {
+        font-size: 1rem;
+    }
+}
+
 /* fixe for bootstrap using px-values for fontsize */
 .panel-title {
     font-size: ($font-size-base * 1.125);
