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Progressive Web Apps
Android & iOS Apps
Ui/Ux Design


A Web and Mobile App developement company from Puerto Rico.
Dedicated to providing excellent service for all businesses and ideas.

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We have some options when it comes to development. Choose one or combine all three. The sky is the limit.

Progressive Web App

  • Concept
  • Design
  • Development
  • Deployment

An Amazing Alternative: Progressive Web Apps can aid a business in developing an application to expand their customer reach while avoiding the added cost of developing an Android/iOS App. Many features are available for PWA's that make it equal to a Native App. It can be used without being downloaded or installed.

Starting from:


  • Concept
  • Design
  • Development
  • Google Play

Capture Android Users: If your Business App or App idea is one that you would like to see in the Google Play Store only, then this is your option. It involves a few more steps than a PWA to publish and make available for users to download. It will require a Google Play developer account but I will help you with the procedure to get one.

Starting from:


  • Concept
  • Design
  • Development
  • App Store

Exclusive on the App Store: Developing an App for iPhone users exclusively is probably something you are searching for. The App Store has its perks and benefits. This option does require an Apple Developer account. This option includes assistance for you in the process of acquiring an account.

Starting from:


Development Process

Our process is simple and straight forward, with plenty of flexibility. We are excited to work with you!

  • Design Phase

    “First, solve the problem. Then, write the code.” – John Johnson

    For our first step, we design our App to adhere to your needs and wants. We use any informaiton that you provide to deliver a beautiful design. We use logos and logo color. From the design, we create an App mockup that demonstrates how the app and navigation will look and feel. This phase establishes your concept and it lays the ground work from which we will build your custom app. The more information you give us, the closer we can get to your vision.

  • Coding Phase

    “Any fool can write code that a computer can understand. Good programmers write code that humans can understand.” – Martin Fowler

    Once we have established our design and get your approval, we begin the coding phase. In this phase we turn your idea and visual design into actual code, bringing the initial idea to life. This process is the longest and can vary between 6 to 14 weeks, all depending on how detailed and how many features the App has. During this time we maintain constant communication with you and provide snap shots and previews along the way to receive your feedback and make any appropriate changes.

  • Test Phase

    “Perfection is achieved not when there is nothing more to add, but rather when there is nothing more to take away.” – Antoine de Saint-Exupery

    Testing, testing, and even more testing. During this step, communication is an extremely important part of the process. After conducting our testing, we hand off a functioning copy of the app to you for you to then conduct your own tests and checks on every aspect of the app, and give us your changes. We will correct/change/apply these changes, and conduct testing again. Once we finish, we send it back. We do this plenty of times in order to meet your every expectation. .

  • Launch Phase

    “Simplicity is the soul of efficiency.” – Austin Freeman

    After a few months of designing, codign, testing, we have arrived at our finish line. The app has been uploaded to the Google Play Store and/or Apple App Store. They have approved the app and have given us the green light to launch our app and make it available to the public. It will now be available to users all aroung the world. The work is not done, but the first step has been taken. Congratulations!


My Skills

Language Skills




Developer Skills


About Me

Graduate from the University of Puerto Rico, Bayamón Campus

Luis Sotto, CEO portrait picture
Luis Sotto - CEO of CienX35 Development

Developer with a Passion

Motivated and dedicated to creating unique and amazing Apps for all of my clients. I graduated from the University of Puerto Rico Bayamón Campus, with a Bachelors in Electronic Engineering Technology. My focus is to help these businesses by providing Top-Tier software development services with exceptional customer service. My goal is to provide the tools to bring innovation to small businesses. I am excited to help you in your journey and promise to do everything I can build something unique, special and rewarding. View my Linked In profile

A few fun facts about me
  • Navy Veteran
  • Love coffee
  • Enjoy growing a garden
CienX35 development

Our Mission

Develop high quality apps while providing exceptional customer service, at an affordable price.

At CienX35 We are dedicated to creating web and mobile applications for individuals, small and medium-sized businesses. The applications are personalized to what the client needs, which means that we can create something really unique and different. We can create apps for most ideas or businesses. We have offices in Puerto Rico and Virginia. We chose the name CienX35 (One hundred by thirty-five) as a tribute to Puerto Rico and its approximate geographical measurements. We are focused on providing unparalleled customer service and making amazing apps!

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Here is what some of my customers have to say about me.