Your home's living digital twin — starting with what's knowable today.
The Passport is a growing, user-owned digital twin of your house. Start with the fast web Starting Score. Add confirmed facts yourself, then improve accuracy over the public starting point. iOS status: early local iOS prototype in active local testing only — not on TestFlight or App Store. Backend foundations live.
The 3-part system
Score → Verify facts → Build your Passport. No jargon, no guesswork.
Score (0–100)
Energy Performance, Resilience Coverage, Verification Quality, and Improvement Momentum combine into one clear Passport Health Score. No letter grades; every improvement counts.
Data: official records, owner-verified facts, modelled estimates
Incentives & Grants
We surface the rebates and grants that actually apply to your home, filtered by country, region, and property profile. Hundreds to thousands in incentives go unclaimed every year — we help you find them.
UK, Israel, US, AU, FR, NL supported
Actionable Upgrades
A step-by-step plan ranked by ROI, comfort gain, and carbon reduction — with synergy-aware ordering. Insulate before you size a heat pump. Battery before you export. The order matters.
Synergy-optimised • ROI-ranked
Why this isn't another EPC tool
Beyond EPC A
Government ratings stop at A. Our score goes to 100 — rewarding solar generation, battery storage, grid export, and demand response. We score the prosumer future, not just efficiency.
Continuous, not stepped
EPC uses letter bands with cliff edges. We use smooth scoring curves — improving insulation from R-20 to R-30 gradually increases your score based on real physics, not arbitrary thresholds.
Open methodology
Every formula, data source, and weighting is published. No black box. Community-contributed and continuously evolving with peer review.
200+ technologies researched
From ASHP COP curves to MVHR recovery rates — sourced from 478 YouTube videos, 50+ podcast episodes, SAP 10.2, ArXiv, and Google Scholar.