About TechFin Review
Free calculators built on verifiable math
TechFin Review is dedicated to demystifying financial math through free, accessible digital calculators for SIP, lumpsum, EMI, credit-card payoff, crypto tax, and freelance rates. Every estimate is designed so you can see the inputs and assumptions behind it.
4
Verification stages every calculator passes
Our method
How every calculator is checked
01
Formula auditing
We test each amortization and compounding formula against worked examples and standard reference calculations before publishing.
02
Variable rate checks
Interest rates, tax slabs, and fee assumptions are reviewed against current published sources and clearly labelled with their date.
03
App verification
Fintech apps listed in our comparisons are checked for stated features, fees, and eligibility rules before any review is written.
04
Plain-language guides
Each tool ships with a short explanation of its inputs so readers understand what the number assumes and where it can mislead.
Editorial independence
Transparent math. Clearly marked partnerships.
Our calculators are free to use and our formulas are open to scrutiny. Affiliate relationships are disclosed plainly next to every recommendation, and they never change how a calculation is performed or how an app is evaluated.