PriviiApp was a private group messaging app I built end to end — product design in Sketch, native iOS in Objective-C, and App Store submission — with a focus on hyper-local connections (proximity over social graphs). It shipped in April 2016.
The document below is the Privii case study (exported as a PDF). It expands on the problem space, product decisions, and technical work in more detail than a short project blurb allows.
If you landed here from search, you may also want the Privii project page for stack tags and status.