# Tavvian

> Tavvian builds free and professional web apps, Android apps and AI tools for individuals, students and businesses. Products: UnitHarbor (free online unit converter) and Sparo (private savings-goal app for Android). Tavvian is the product brand of ENDRIANO-HANSEN DIGITAL, a company registered in Norway (org. no. 936 023 223).

Contact: hello@tavvian.com · +47 92 11 30 61 · Company details: https://www.tavvian.com/contact/

## Products

- [UnitHarbor](https://www.tavvian.com/unitharbor/): Free online unit converter (app at https://www.unitharbor.net/) with 16 categories – length, weight/mass, volume, temperature, area, speed, time, pressure, energy, power, force, angle, fuel consumption, data storage, numeric base and currency (live rates, 50 currencies). Also a Recipe Scaling Calculator, Food Calories Tracker, construction calculators, bulk converter, visual comparators, 130 educational articles and a 220-term measurement glossary. No signup needed; optional paid UnitHarbor Pro; embeddable widget and API for developers.
- [Sparo](https://www.tavvian.com/sparo/): Savings app for Android. Set savings goals with photo and deadline, see what percentage of your salary you save (savings rate), automate recurring savings, forecast when you reach each goal, savings challenges (52-week, 100 envelopes, no-spend month), smart reminders, light/dark mode, English and Norwegian, any currency. No account, no ads, no tracking – all data stays on the phone. Free, with an optional one-time Sparo Pro purchase (no subscription). Coming soon to Google Play (package com.tavvian.sparo).

## Key pages

- [Home and projects](https://www.tavvian.com/): Overview of all Tavvian projects and FAQ.
- [About Tavvian](https://www.tavvian.com/about/): Who we are, what we build and our philosophy.
- [Contact](https://www.tavvian.com/contact/): Email, phone and company details.
- [Sparo privacy policy](https://www.tavvian.com/sparo/privacy/): Sparo collects no personal data; English and Norwegian.
- [Website privacy policy](https://www.tavvian.com/privacy/): Cookie consent; Google Analytics only after consent.
- [Terms of Service](https://www.tavvian.com/terms/)

## Optional

- [Support Tavvian on Buy Me a Coffee](https://buymeacoffee.com/tavvian)