The investment appraisal
tool the world was
missing.
Assay replaces a decade of fragmented, outdated calculators with
one platform that is faster, more accurate, intuitive and
actually explains what the numbers mean.
"Build the most trusted, free and intuitive investment appraisal tool on the internet — one that students, entrepreneurs and professionals return to by default."
Our core mission
How Assay works
From raw inputs to confident decisions in seconds.
Why we built this
Every existing tool gets at least one of these wrong.
Fragmented tools
All 9 methods in one unified flow — not one calculator per tab.
No result interpretation
Every result comes with a plain-English verdict, not just a number.
Visually outdated
Designed for 2026. Every competitor still looks like 2009.
No project memory
Save, revisit, and compare your work. Nothing lost on close.
Desktop-only UX
Fully responsive from 375px up. Works on any device.
No ARR support
ARR with depreciation input — a gap every other tool ignores.
Nine methods. One tool.
Every standard appraisal method in a single unified flow.
What we stand for
Accuracy first
Our engine is built strictly on industry-standard finance principles and textbook (ACCA) examples — our accuracy is rooted in established financial mathematics, not guesswork.
Clarity over complexity
Every result includes a plain-English verdict. A number without context is just noise. We explain what the output means, not just what it is.
Design as a trust signal
A tool that looks professional signals that it was built by someone who cares about getting it right. Design and rigour are not in conflict.
Free at the core
All nine calculation methods are free forever. Future premium features will only be to sustain the platform — not to gate the value that matters most.
Ready to do the numbers?
All nine methods. Free, always. No account required to start.