Ping is a simple way to exchange information with people you meet - a digital business card if you will. However this is just the foundations for a personal CRM - a tool that will help you keep on top of and organise your network.
Reminder 2.0 is the best way to keep track of your reminders on iOS. Quickly add multiple reminders in a row using the return key. Set time and location alarms to make sure you don’t forget the important stuff. The interface was designed to fit right in with other first party apps. Reminder was built to be quick to launch and easy on your battery.
Addme is my social platform 'business card', it's awesome.