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About us

Here at Cobalt Sign, we are developing native mobile apps for iOS, Android and Windows. The one sentence that defines us and our work looks like this: “Don’t stop until you’re proud”. As it states, we are always focusing on developing beautiful & quality mobile applications that we are proud of, both for our clients and for ourselves.

One of our dear apps is Ready Set Holiday, a travel preparation app which has reached 1000000 downloads so far and a 4.5 star rating on the Play Store.

Giving back

We love sharing our passion and knowledge and giving back to the community. Since 2012, we’ve created a couple of pro bono mobile apps for our city and started a free mobile app development course for students, called Mobile Summer.

If you are part of and NGO or city project and need a mobile app, don’t hesitate to write us, we’d love to help. Below is a short form and we’ll get back to you.

I need a mobile app!

Our contribution so far

Pro bono apps for Timișoara
Mobile Summer editions
Mobile Summer participants
Apps developed at Mobile Summer
Hours invested in pro bono work
Stray cats and dogs saved

Pro bono apps for Timișoara

Plai Festival App

Since 2013 the official iPhone & Android apps contain useful information about the venue, partners, cultural events, guests, tickets and most important, the daily schedule.

plai-mockup-ios pro bono apps
fidt-ios-mockup pro bono apps
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FIDT-android-mockup pro bono apps


The official app for the Timișoara International Dance Festival has details about every course and seminar taking place during the event, such as the prices, venues of the event and also a complete schedule.

logo mobile summer

Mobile Summer

Since 2014 we are creating a free mobile app development course for programming savvy students from Timișoara. It all started as a way to share our passions and to give back and grow the mobile developers community. Through our course, students can learn new technologies and implement their own app ideas.

Our purpose is to help them understand the basics of programming and encourage teamwork and creativity, everything in a cozy, informal and friendly environment. The students get a taste of real-life mobile development, learn to implement their own ideas and at the end of the course their creations get published on the app store.

Find out more about our initiative on

Mobile Summer 4.0 - Apps for our city

This year we organized the 4th edition of our course. Its structure was a bit different, we made apps for our city, Timișoara in collaboration with 3 NGOs: Alergotura, FITT Timișoara and Plai Association. We held 6 meetings between June 24 & July 5, where both the participants and mentors worked on these apps. Read more about how Mobile Summer 4.0 was and check out the apps below.

Read here


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TIMEvents 2020

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Get in touch if you need an app!

We want to achieve as much as we can through Mobile Summer so if you are representing an organization or project from Timișoara with ecological, cultural or artistic matter don’t hesitate to contact us. Fill in our form to help us understand the app you need and we’ll contact you.

We are always happy to help and to hear your ideas!