Useful first.
Everything else follows.

ToolMitra helps you explore everyday questions with clear calculations and explanations you can inspect.

One well-built tool at a time

We are starting with compound interest: regular contributions, different schedules, goal planning, inflation and comparison. Future calculators will have their own inputs, examples and layouts, built around the questions they answer.

The method should be visible

We show formulas, assumptions and limitations. A projection is a way to examine an idea, not a promise of an outcome. Worked examples let you check what the calculator is doing.

Free to use

No subscription, signup or paid export is required. Advertising, sponsorships or optional donations may support the service later. None are active in this first version.

Your numbers stay on your device

Calculations run in your browser, without uploading financial inputs. Read how this version handles data.