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Tavvian is a company that builds free and professional web applications designed for everyday use. We create high-quality tools for businesses, students, and individuals who want fast, reliable, and professional results. Tavvian is the product brand of ENDRIANO-HANSEN DIGITAL, registered in Norway.

UnitHarbor is a lightning-fast unit converter built for speed, accuracy, and simplicity. It supports conversions for length, weight, temperature, currency, and more. It also includes smart tools like Recipe Scaling Calculator and Food Calories Tracker. Additionally, UnitHarbor features a comprehensive knowledge database with in-depth articles for learning and expanding your knowledge.

Yes, UnitHarbor is completely free to use. All basic conversion tools and calculators are available without any cost or registration required. We also offer Pro tools with advanced features for users who want even more functionality - these are available for a small fee.

UnitHarbor supports a wide range of conversions including length (meters, feet, inches), weight (kilograms, pounds, ounces), temperature (Celsius, Fahrenheit, Kelvin), currency exchange rates, and more specialized tools like recipe scaling and calorie tracking.

Sparo is a savings app for Android. You create savings goals, log what you save, and Sparo shows your progress, when you will reach each goal and what percentage of your salary you save each month. It also includes savings challenges, recurring savings and reminders.

No. Sparo has no account, no ads and no tracking. Everything you enter is stored only on your phone. See the Sparo privacy policy.

You can contact Tavvian by visiting our Contact Us page or sending an email to hello@tavvian.com. We're always happy to hear from our users and answer any questions.

Yes! We are constantly working on new tools and applications. Follow us to stay updated on our latest releases and innovations.