What are some alternatives?
When comparing UpHabit and ZooWho, you can also consider the following products
Dex - Stay in touch, remember where you left off, and be better at relationships.
Monica - Monica is an open-source personal CRM to keep track of your friends and family.
Cloze - Smarter Relationship Management
Friendly Reminder - Never lose touch with your friends, a simple personal CRM
FollowUp Personal CRM - The personal CRM for Gmail
Hippo - Forgetting personal details? Hippo helps you stay attentive. Keep track of friends, family and colleagues you care for. So next time you meet, you remember all their important details.