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Even Trade
Agree a fair trade with a neighbor. Even Trade says the first number so nobody has to.
No money. No account. Nothing leaves your phone.
A trade is two gifts. You each say what you bring; Even Trade says whether it's even.
With someone standing next to you. Takes about a minute.
Waiting
Your group
People you've traded with
You're both here. One of you starts, the other joins.
They tap I'm joining and scan this, or type the letters.
Waiting for the other phone…
You bring
Even Trade's read: — edit
Fairness read
Say what you're bringingThey bringfilling in on their phone
Even Trade's read: —
Only your two phones will hold this. Even Trade can't see it.
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Done.
You both have it.
taps Scan their reply and points at this.
Fill in both sides on this phone, together.
Then they scan what this phone shows, agree, and you scan their reply.
They: Home → Scan a code → point at this → Agree.
Where things stand
rates
Trades
More
A catch-up carries your trades to another phone by any message app. The yearly file is your record for taxes; Even Trade reports nothing to anyone.
How Even Trade works
1You each say what you bring. Even Trade suggests what it's worth and why.
2You both agree on your own phones. Only your two phones hold the trade.
3If it's lopsided, the difference is kept as something you can call on later, from that person or from your group.
–No money moves. No account. Nothing is stored on a server, and nobody can read your trades.
You
Your name
Only needed when there's no signal: the other phone scans it once so it knows who you are.
Your group
Start a new group
For people who see each other: a block, a market, a congregation. You set the rates once; members pick them up when they scan your group's code.
Technical details
Your phone made a signing key on first run. The private half never leaves it and cannot be copied out, even by this app. The public half below is what other phones use to check that a trade really came from you. Each trade is a record signed by both phones; a record only counts when both signatures check out. Live sessions pass through a relay on eventrade.net that forwards encrypted messages and keeps nothing.
Key id · created · build