Life & fun · November 12, 2022

Safe Solo
Stay safe by checking in
What it does
Safe Solo triggers followup if something happens to you. It asks you to check in regularly, to confirm you're OK. If you don't check in, it will alert people you've designated. Available now for iPhone.
Does a similar job
all alternatives →


AlivePing Check-inMar 2026 · apps.apple.com · ▲10Never worry alone: Safety alerts for missed check-ins


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I made a thing! In 2014, I was holding a stack of iPhones and thought to myself: "Hey, if I had each phone display a playing card, I could click a button and they'd shuffle themselves" I pared that idea all the way down to this: trading cards made of e-ink displays. Right now, each card costs me about $20 each, but with only a bit more scale, I think I can get that down to $10. In doing this project, I learned how to design electronics and circuit boards. I learned Rust and wrote my first driver, I upped my CAD skills, 3D printed, and did my first resin casting. I generated the images on the…
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