We strongly believe the future is mobile.

...and we love creating beautiful apps.


About Us

We are a team of software engineers focused on quality mobile app development, building robust apps with  innovative, inspiring designs. 


Pixel perfect, native apps for iPhone and iPad with a great-looking design.


Beautiful, native apps for Android smartphones, tablets, and of course, smartwatches.


High quality, native, modern apps for Windows 8 and Windows Phone.


"We love working together with Oana and Arthur from Cobalt Sign especially for Windows Phone and Windows 8 platforms. They are highly skilled experts for those platforms and combine great UX design and coding skills."

− Simon Schweigruber, CEO - DWB.ch

"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

"Mit Cobalt Sign zusammen zu arbeiten ist das beste was uns passiert Ist, unsere Vorstellungen wurden engagiert und professionell umgesetzt. Ohne Cobalt Sign wäre WPVision.de nicht da wo es heute ist."

− Jens Krakau, Co-Founder - WPVision.de

Quality code, Awarded apps

We create high quality apps, with elegant code and pixel perfect designs

Let’s talk about mobile app development! Get in touch


Samsung Gear App Challenge

Our Tea Cup app specially designed for Samsung Gear 2 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.”

Microsoft WOWZAPP

Worldwide Windows 8 Hackathon, 2011. We won the “Lifestyle” award with our health&fitness app, Weightographic and our Windows Phone app, Tea Timer.

Fast Track to the Mobile App

Design and development competition organized 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, how Microsoft described it.

Windows Azure Competition

Our Microsoft Silverlight and Azure project, HotSpot, won the “Engineering Competition” organized by Microsoft Romania and BEST Timisoara in 2009. The project is open source on Codeplex.

We can help bring your ideas to mobile devices.

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