Spend. Save. Earn back.
Book hotels & flights via our partners — earn LENG tokens or USDC cashback on every trip.
Popular destinations
StaysFour ways to earn.
Every sector turns a real-world contribution into BOUN. Each BOUN is USDC-backed and convertible to LENG at a fixed Constitution rate.
Protect the ocean. Beach, reef, and ghost-gear cleanup pays in verified BOUN per kilogram recovered.
Visit verified heritage sites worldwide. UNESCO and protected sites carry a geo-multiplier bonus.
Verified zero-emission trips earn BOUN per kilometre. Tuktuks, scooters, and EV cars all qualify.
Spend at partner merchants worldwide and receive a share of every transaction back in BOUN.
Three steps. Real proof. Real value.
- 01Act
Submit verifiable proof of a real-world contribution — photo, GPS coordinates, certificate, or partner receipt — from inside the Der Leng app.
- 02Verify
AI assistants and human admin reviewers check every submission against Constitution v1 standards before any reward is issued to your wallet.
- 03Earn
BOUN lands in your wallet. 50 BOUN = 1 LENG, and LENG becomes convertible to USDC at the fixed Constitution rate in Phase 2.
Every gain has a paired loss.
The Living System Principle: every reward Der Leng issues is anchored to a verified, measurable contribution to the planet.