To re–engage users with an app, use the following strategies:

• Build remarketing lists, engage in reactive outreach, offer something free, and don’t track anything outside of installs
• Build remarketing lists, engage in proactive outreach, offer something unique, use deep linking, and track everything beyond installs to understand your most valuable users
• Build remarketing lists, engage in reactive outreach, use deep linking, and track outside of installs for your most valuable users
• Build general email lists, engage in reactive outreach, don’t use deep linking, and don’t track outside of installs