TóngreinirStudio and personal work

Tóngreinir ehf.

Software projects, products, and websites from Iceland.

Tóngreinir is the studio of Hilmar Þór Birgisson. This site collects current work, company roles, and older projects.

Founder profile

Founder and technical roles.

I studied electronic and computer engineering at the University of Iceland, served as chairman of the student council for the department, completed an MSc in 2012, and built my thesis project, Musical tone recognition system for interval tone training on mobile devices, into Tóngreinir in 2013. The work here spans product development, technical leadership, and long-term maintenance across apps and websites that I am personally involved in.

Founder of Tóngreinir

Founded in 2013 around my award-winning MSc thesis work in mobile tone training.

CTO and board member at Bara tala

Working on product and technical direction for Icelandic language learning tools.

CTO and board member at Mussila

Responsible for technical direction across Mussila's learning products.

Former board member at IGI

Served on the board of IGI for two years.

Co-owned companies

Companies connected to Tóngreinir.

Tóngreinir is a co-owner in these companies, where I also serve in technical leadership roles.

Bara tala website artwork
Bara tala app icon

Bara tala

Co-ownerCTOBoard member

An Icelandic language learning company focused on practical conversation and training.

Mussila website artwork
Mussila app icon

Mussila

Co-ownerCTOBoard member

An EdTech company making music and literacy products for children, homes, and schools.

Current work

Current products and websites.

A selection of apps and sites currently maintained through Tóngreinir.

Hverinn logo

Hverinn

Website maintenanceHospitalityCurrent

Website maintenance for Hverinn.

Global Wader logo

Global Wader

Website maintenanceResearchCurrent

Website maintenance for Global Wader.

Orðagull icon

Orðagull

Current appEducationMaintenance

A long-running Icelandic language app by Mussila that I still maintain, focused on strengthening vocabulary, working memory, auditory processing, and spoken language.

Selected archive

Older projects.

These apps are older work and no longer actively maintained.

Note Challenge icon

Note Challenge

Legacy appMusic learning

A voice and instrument-driven music education app focused on notation, timing, and performing notes.

Store links are no longer available.

Meowsy icon

Meowsy

Legacy appStorytelling

An interactive children's storybook with mini-games designed for ad-free, child-friendly play.

Store links are no longer available.

Mjási icon

Mjási

Legacy appIcelandic version

The Icelandic version of Meowsy, fully localized and voiced by Icelandic actors.

Store links are no longer available.

Tryangle icon

Tryangle

Legacy appGame

A retro-style survival game.

Store links are no longer available.

Note Adventure icon

Note Adventure

Legacy appEducation

A voiced children's story with music learning elements.

Store links are no longer available.

INFICON logo

Software tools for INFICON

Legacy workClient workIndustrial

Built digital tools for INFICON, including Bubbleizer, EcoBoost calculators, and sales demo applications.