Why it's built this way
Apps like this have come and gone. The ones people kept had a reveal: you don't see the shot as you take it. The ones that stumbled pushed people to invite their contacts, or ran out of money storing everyone's photos. Durpin keeps the first and avoids the rest.
- The reveal is yours.
- Shots on your own roll come back face down, and friends only ever see the ones you share. The server enforces it, so not even a modified app can peek at yours.
- Invites are a favor, not a toll.
- You never have to invite anyone to use it. You get five open invites. One comes back when a friend joins, or after 7 days if nobody uses it.
- One card per friend.
- Someone who shoots all 27 doesn't bury someone who shot two. Each friend's day is one card.
- Built to stay cheap.
- It runs on one small server at home. Every photo has a size budget, and the film look is made on your phone.