We are a San Francisco based mobile design and application development studio.

Our goal is to help startups make the jump to mobile by providing a full cycle app development team at an affordable price. From simple prototypes to pitch investors to a scalable app that will grow with your company, we will help you achieve your goals - pain free.

With limited investment and tough deadlines, startups can fail by taking too long to launch or spending time, energy and money developing products with no proof of concept.

Startup Studio is here support you by developing your first usable and scalable product to help identify product-market fit and push you to the next level.

We specialize in iOS apps using the latest technologies in both languages Objective-C and Swift, we are a diverse team of developers with years of experience in web and Android.

Step 1

Send us an introduction of your project and we will create an initial design of your app and send it back to you - for free!

Step 2

If you like what you get, we will put together a final quote for product design and/or development of your product.

Step 3

We assign you the best team to your project and start building!

app development


We craft mobile apps, to turn ideas into real products. Using state-of-the-art technologies, we make sure the project stays modular and scales smoothly. We don't celebrate when we acquire clients, we celebrate when our clients gets positive feedback from theirs.

app development

UX Design

From user experience, wireframes and prototypes to mock-ups, interfaces, and assets, we've got you covered. Through a highly interdisciplinary environment, we build gorgeous interfaces, without losing sight of the engineering aspect.

What Cool People Say

"James decided to follow his heart and mind by moving to the States, something I wasn't personally keen about since I was going to have a rockstar leaving a team that respected him dearly. Regardless, I would highly recommend him for any organisation thirsty of getting things done."
Walter Rosenkranz
Country manager, Zomato Chile
"James is an amazing entrepreneur with a passion for Startups and Technology. I strongly recommend James as a professional, a business partner and a friend."
Gary Urteaga
Founder HOLOSENS / Co-Founder
"I first met James in Santiago socially and while he was working on Deemelo. He is without exception a very kind, considerate and pleasant person to deal with. I can also recommend his integrity and honesty."
James Kennedy
Partner at
"Working with Start App Studio quickly became about more than just getting a UX design team for our app done but rather evolved into creating a lasting friendship which we hope we can utilize in the future in order to achieve great things. James is kind, responsive and extremely patient. While almost all other freelancers don't bother to truly understand one's mission, James take true initiative in trying to fully understand your goals and what it is you truly hope to achieve. Whatever your project may be, James will in some way be able to connect with you and truly grasp the idea and even contribute to it. Working with James was a true pleasure and we're glad we were able to not only find a great designer but also make a great friend."
Camilo & Juan Mendoza
Spacein Founders .