Your photos already remember every street you stood on. crosd reads only the where and when written into them, draws your trace, and — with mutual consent — shows where your path crossed someone else's, before you ever met.
The images are never opened, uploaded, or shown to anyone. Only place-time hashes are compared.
Nothing is compared until the other person accepts. Decline, and no one is told anything more.
Neither side sees the other's map — just the moments you were both in the same place.
Coming soon to the App Store