Nobody wants to be treated as a number. And even though most companies try not to, it tends to speed things up if you know what number you actually are. But having your details ready when you need to can be challenging.
Details is here to help. You can store all the details you get under a group you choose with the label you choose. You can also select if it relates to a site, mail address or phone number. Tap on any of the details to open Safari, call the number, send a mail or copy it to the clipboard for use somewhere else.
To keep your details private you can set a passcode. And rest assured all your details are only stored in the app and nowhere else!