Start with evidence
Everyday purchases contain product, merchant, place, price and time — but most of that context disappears.
Yumo Yumo connects public price series with receipt-level observations to build an inspectable price memory — and personal financial intelligence inside the application.
Explore how everyday prices change across products, markets and time. Every observation keeps the context needed to understand what changed.
This country is supported inside the application, but no source-complete comparison series is published in the public panel yet.
The landing page establishes trust through public price data. After the application gate, the same system turns a person’s receipts into private spending memory and useful patterns.
Capture the document without a manual bookkeeping flow.
Resolve merchants, normalize items and preserve the original evidence.
See recurring products, price changes and the rhythm of everyday spending.
Every verified receipt strengthens the shared price memory. Yumo Yumo measures that contribution and connects it to a blockchain-backed reward record — without turning the experience into a Web3 tutorial.
Receipt-derived price observations are grouped into epochs, reduced to a Merkle root and anchored across Solana and Arweave. The landing page shows the signal; the ledger lets anyone inspect the record.
Read the product thesis and technical architecture, then explore the questions, people and company behind the system.
The product thesis, Proof of Expense and the economic narrative behind Yumo Yumo.
The receipt pipeline, data schemas, trust layer, risk treatment and token mechanics.
Clear answers about receipt processing, privacy, price memory, contributions and the public proof layer.
Yumo Yumo Inc., the founder, the field research and the company story behind the product.
Everyday purchases contain product, merchant, place, price and time — but most of that context disappears.
Receipt formats, merchant names and product descriptions are resolved into a consistent price memory.
Public price observations retain their institution, URL and effective date instead of becoming anonymous numbers.
The public sees a trustworthy price record. The individual sees clearer patterns inside the application.

Yumo Yumo was founded by Uğur Alacakapı, an international economics graduate whose work sits between monetary systems, public data and verifiable digital infrastructure.
Eight years of blockchain-protocol research and field research across Southeast Asia shape a practical thesis: everyday receipts can become durable economic evidence without turning people into bookkeepers.