The Chemistry of Apps

We like to take a meticulous approach to creating gorgeous apps,

starting from just an idea to product launch.

#iOS #Android #Windows

International Awards

We always love a good challenge, enjoy taking part in competitions and, of course, receiving awards.

Samsung Gear App Challenge

We created a wearable version of our Tea Cup app designed for Samsung Gear 2. It was one of the winners in Round 1 of the Challenge.

Nokia Developer Champion

Awarded to Oana Csertus in May 2013. “Nokia Developer Champion is a recognition and reward program for top mobile developers from around the world.”

Fast Track to the Mobile App

Design & development competition by Core77 and Microsoft in November 2011. Our app, 1tap2send was one of the notable finalists.

Imagine Cup “Rockstar”

“Windows Phone Rockstar Award” 2010. We reached the top 10 with our app, Hawkeye, a travel trails app, that organised your photos and created a map trail.



Great user experience starts with understanding your users and goals. Researching, testing and creating user stories, mockups and interactive wireframes are all part of our process.


First impressions are very important and hard to change. Have your apps stand out by letting us create a beautiful, modern design that expresses your ideas.
CobaltSign - Mobile App Development


Reach your users on their preferred platforms - iOS, Android, Windows - with high-quality native apps, made by a team of professional mobile developers.
Cobalt Sign - Backend Development


Every modern app should integrate server-side data, social media accounts, push notifications and analytics. We can connect to your own API or create a custom one for your apps.
business app


October 15, 2016

Project iBrand

March 30, 2016

cooking app

PetitChef for Android

March 24, 2015

Vocea Romaniei Windows Phone

Vocea României 2013

December 1, 2013


“Brilliant and intelligent team, precise, professional and extremely on-time, transparent and very friendly. Was a very pleasing and professional collaboration.”

Reza Paya, CTO ARMNet

“We love working together with Oana and Arthur from Cobalt Sign. They are highly skilled experts for mobile platforms and combine great UX design and coding skills.”

Simon Schweigruber, CEO - Dream Production AG

“Cobalt Sign delivered professional results within a very short time, which helped us meet the deadline for a product-launch. In addition to the professional results of the accomplished work, we especially want to highlight the quick understanding of our requirements and the structured, professional way of working.”

Mark Voorboom, Product Manager - Stb Automatisering & Advies BV

“I've had the pleasure of working with the Cobalt Sign team on a few projects and I'm looking forward to working with them again. Using a clean and structured project management approach, oriented to getting things done, they were able to deliver high quality work on amazingly short deadlines, while leaving out the stress and chaos that usually arises in these situations. Did I mention they consistently create beautiful and responsive UI's?”

Andrei Marinescu, CTO - Appscend

We can help bring your mobile app ideas to life.

Request a quote