Make information more user friendly

Fixes #465

deltachat-ios/Info.plist

@@ -39,13 +39,13 @@
 	<key>LSSupportsOpeningDocumentsInPlace</key>
 	<true/>
 	<key>NSCameraUsageDescription</key>
-	<string>Allowing access to the camera lets you take photos and videos.</string>
+	<string>This is used to take photos and videos during chats or scan QR codes.</string>
 	<key>NSContactsUsageDescription</key>
-	<string>Allowing access to your address book lets you chat with contacts from your device.</string>
+	<string>This is used to import email addresses of your contacts.</string>
 	<key>NSMicrophoneUsageDescription</key>
-	<string>Allowing access to the microphone lets you record audio.</string>
+	<string>This is used to record voice messages during chats.</string>
 	<key>NSPhotoLibraryUsageDescription</key>
-	<string>Allowing access to the photo library allows you to upload images from it.</string>
+	<string>This is used to share your photos and videos or set up a profile picture.</string>
 	<key>UIBackgroundModes</key>
 	<array>
 		<string>fetch</string>

tools/untranslated.xml

@@ -4,8 +4,8 @@
     <!-- iOS specific untranslated strings -->
     <string name="import_contacts">Import device contacts</string>
     <string name="import_contacts_message">To chat with contacts from your device open Settings and enable Contacts.</string>
-    <string name="INFOPLIST.NSCameraUsageDescription">Allowing access to the camera lets you take photos and videos.</string>
-    <string name="INFOPLIST.NSContactsUsageDescription">Allowing access to your address book lets you chat with contacts from your device.</string>
-    <string name="INFOPLIST.NSMicrophoneUsageDescription">Allowing access to the microphone lets you record audio.</string>
-    <string name="INFOPLIST.NSPhotoLibraryUsageDescription">Allowing access to the photo library allows you to upload images from it.</string>
+    <string name="INFOPLIST.NSCameraUsageDescription">This is used to take photos and videos during chats or scan QR codes.</string>
+    <string name="INFOPLIST.NSContactsUsageDescription">This is used to import email addresses of your contacts.</string>
+    <string name="INFOPLIST.NSMicrophoneUsageDescription">This is used to record voice messages during chats.</string>
+    <string name="INFOPLIST.NSPhotoLibraryUsageDescription">This is used to share your photos and videos or set up a profile picture.</string>
 </resources>