What are some alternatives?
When comparing Nat App and ZooWho, you can also consider the following products
Affinity - Relationship Intelligence, Reimagined
Monica - Monica is an open-source personal CRM to keep track of your friends and family.
Dex - Stay in touch, remember where you left off, and be better at relationships.
Cloze - Smarter Relationship Management
UpHabit - The trusted Personal CRM for busy people
Ryze App - Ryze is the Personal Relationship Manager designed to help you build, maintain, and add value to your relationships and personal network.