A fitness app that costs $1000. But the $1000 is a bond tha… Twetch · July 25, 2019 A fitness app that costs $1000.But the $1000 is a bond that market buys Bitcoin at time of payment and daily earmarks 1/1000th of it for reimbursement when an unspoofed fitness-oracle check-in is confirmed on-chain. Replies Twetch · July 25, 2019 Brilliant.