About koinva
We help you get more back from every pound you spend in the UK by simplifying reward stacking.
Our mission
Millions of pounds in cashback and card rewards go unclaimed because stacking is confusing. We turn that into a single, clear recommendation: which card to use, which portal to click through, and which voucher to apply — with an explainable total yield so you know exactly what you're earning.
What we do
- Aggregate cashback and voucher data from major UK portals
- Let you add your cards (reward rates only)
- Recommend the best payment stack per merchant
- Show a transparent breakdown of yield
Your privacy
We never store or see your card numbers. We only use the reward information you provide so we can calculate the best stack. Your data is used solely to power your recommendations.