We build cross-platform mobile apps with Flutter and Dart, shipping a single codebase to iOS and Android without giving up a native feel. It is a fast, cost-effective way to launch and grow a polished mobile product.
Customer Reviews
I was astonished that, in such a short period of time, something that other companies had taken months to understand, this company was able to execute. Since then, we have never looked anywhere else. I would never consider another company. This is how much we believe in them.
The other agencies we looked at, frankly, wanted to tell us how great they were. Sembit instead asked a lot of probing questions and provided the kind of consultation that really made us comfortable in hiring them.
It's been excellent every step of the way. The initial conversations were excellent — we had an instant human connection. In addition to being professional, they also had a human touch that's irreplicable.
I've really loved working with them. Sembit always delivers what they say they're going to deliver, in the time they say they'll deliver it. Whenever we have a deadline for a task delivery, the team gives us detailed and frequent updates about their progress. It's been a great partnership.
Sembit's team really took on the mindset of our business which resulted in a better product with thoughtful decisions from developers. We have been able to have healthy discussions about the pros and cons of a design choices which ultimately makes a better product in the long run.
Sembit has over-delivered on their promises at every step of the process. They've come in ahead of schedule and below budget, and they let us know if we are asking for too much. They are clear communicators, and it made a world of difference for our company.
We have built and modernized Flutter apps across government, nonprofit, healthcare, and laboratory settings, each with a single codebase serving both iOS and Android.
MV Life: Modernizing a City's Community App
The City of Mission Viejo asked Sembit to maintain and modernize MV Life, its community app already live in the App Store and Google Play. A code review showed the app was more than four years out of date, so we upgraded it to the latest Dart and Flutter, fixed hundreds of compatibility and compiler errors, removed unwanted features, set up automated builds for both stores, and diagnosed a broken push-notification flow. Updated, tested versions were back in both stores just two months after kickoff.
The City of Mission Viejo partnered with Sembit to modernize its “MV Life” community app, bringing an out-of-date codebase up to the latest Dart and Flutter, cleaning up unwanted features, and releasing to both app stores in just two months.
EducaPro: A Multilingual App for Childcare Providers
Provider Services Fund, an Oregon nonprofit with a state mandate to expand childcare, partnered with Sembit to build EducaPro, a mobile and web app that is English- and Spanish-native. It helps small in-home daycare providers stay compliant with state regulations, document their operations, and complete continuing education. Delivered on time and under budget, the first release launched with no major bugs and a five-star App Store rating.
Provider Services Fund partnered with Sembit to build EducaPro, a multilingual mobile and web app that helps small Oregon daycare providers stay compliant with state regulations, document their operations, and complete continuing education.
alta: A Secure Communication Platform for a Tribal Community
The Confederated Tribes of Grand Ronde partnered with Sembit to create alta, a secure mobile platform that delivers tribal news, events, and documents directly to enrolled members. Built to give the Tribe full ownership over communication beyond the limits of email, SMS, or social media, alta serves as a trusted, private hub for tribal information and community connection.
The Confederated Tribes of Grand Ronde partnered with us to create alta, a secure mobile platform designed to deliver important tribal news, events, and documents directly to enrolled members.
These are the situations where teams most often bring us in for Flutter work, from launching a cross-platform app from one codebase to modernizing an existing Flutter or Dart app that has fallen behind.
Flutter lets us build for iOS and Android from a single Dart codebase. This keeps both platforms in sync and costs far less than maintaining two separate native teams. Because Flutter renders its own UI, apps look and feel consistent across devices. This is the most common reason teams choose Flutter.
Oregon-Based Flutter and Dart Development Team
Projects completed
Years in business
Average Years Experience per Employee
Our Oregon-based team has been building mobile apps since the earliest days of the smartphone, long before cross-platform frameworks matured into what Flutter is today. That history matters because mobile technology changes constantly, and we have worked through multiple generations of it. We know where cross-platform tools shine and where they do not.
We work with clients in real time, without time zone delays, which is especially valuable during store submissions, production issues, and the compatibility problems that surface when an app has fallen behind. Whether you need a new Flutter app built from scratch, an aging one modernized, or a backend to support it, we can design, build, ship, and maintain the whole thing.
Our approach is not just to write code. We ask about your users, your budget, and your long-term plans, and we help you decide when Flutter is the right choice and when it is not.
Tell us more about your custom Flutter development needs. We can help.
Get expert guidance from Nathan Theophanes (Sembit's President) and Shaun Davidson (Sembit's VP) regarding your Flutter project. We'll be in touch in hours, not days.
One Dart codebase targets both platforms, which reduces cost and keeps features consistent across iOS and Android. This is the core advantage of Flutter and shapes how we architect the app.
Flutter renders its own widgets, giving fast, smooth interfaces that behave like native apps. We build layouts that adapt across screen sizes and keep interactions responsive.
We build apps that support multiple languages natively, including locale-aware layouts and formatting. This is essential for apps that serve diverse or bilingual communities.
We connect Flutter apps to the web services, APIs, and databases behind them, including systems we build ourselves. This covers authentication, data sync, and reliable communication with the server.
We set up automated build pipelines for both app stores and manage the submission and review process. This keeps releases repeatable and reduces the friction of shipping updates.
We implement push notifications and sensible offline handling so the app stays useful even with intermittent connectivity. We also diagnose and repair broken notification flows in existing apps.
FAQ: Flutter and Dart Development
Usually, yes, if you want a polished app on both platforms without the cost of two native teams. Flutter builds both from one Dart codebase, which keeps features in sync and lowers cost. Native still makes sense for apps that lean heavily on the latest platform-specific hardware or APIs, and we will tell you when that is the case.
Yes. Flutter renders its own UI, so apps are fast and smooth and can match native look and feel closely. Good performance still depends on how the app is built, which is where our experience matters.
Yes. This is one of the most common reasons teams come to us. We upgrade apps to current Dart and Flutter versions, fix the compatibility and build errors that accumulate, and get clean, tested releases back into both stores. For the City of Mission Viejo, we did exactly this in about two months.
Yes. We build the APIs, authentication, and data synchronization behind the app as well as the app itself. That means one team is accountable for the whole product, and the app and its services are designed to work together.
Yes. We set up automated builds for both stores and guide apps through the App Store and Google Play review and approval process. We also diagnose and fix issues like broken push notifications that can hold up a release.
Yes. Mobile apps need ongoing attention as Dart, Flutter, and store requirements change. We continue to update, improve, and support apps over time, and if you prefer, we can hand off to your internal team with documentation.
