Luvup.io
Luvup is a React Native app that is currently available in the App Store and Google Play.
I began building Luvup because I thought the idea of reducing a relationship to a score of some sort with a social media style app was a funny idea. Also something that could probably create some interesting heuristics I could create displays for. Many people react to the idea by saying "This is like that Black Mirror episode". I don't necessarily disagree.
The Luvup client is built in React Native. The API is a GraphQL endpoint I put in a Vercel serverless function.