These are the situations that most often bring companies to us, from launching a new product to rescuing an app that can no longer be cleanly built.
When you have an idea for a mobile product, we help take it from concept to a shipped app. We work through design, user flows, and architecture, then build a native or cross-platform app that syncs with the backend it needs. We also handle the app store submission and review process so your first release lands smoothly and is ready for real users.
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 build mobile apps across the public, nonprofit, healthcare, and enterprise sectors, each syncing securely with the systems behind it.
EducaPro: A Multilingual Compliance App for Childcare Providers
Provider Services Fund, an Oregon nonprofit with a state mandate to expand the availability of childcare, partnered with Sembit to build EducaPro, a multilingual 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 5-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: Secure Communication for the Confederated Tribes of Grand Ronde
The Confederated Tribes of Grand Ronde partnered with Sembit to build alta, a secure, member-only mobile platform that centralizes announcements, events, and sensitive documents, with PDF watermarking to protect internal information.
Since its public launch in August 2025, alta has significantly improved message deliverability through push notifications and achieved double-digit adoption across the Tribe's 5,400 enrolled members.
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.
Kashi Phlebotomist App: Streamlining Field Operations
Kashi Clinical Laboratories partnered with Sembit to build a unified platform that streamlines phlebotomy operations end to end. It gives office staff real-time visibility into field work and gives phlebotomists an intuitive portal for assignments, documentation, and communication.
The result is smoother coordination between the lab and the field, with less friction at every step of the process.
Kashi Clinical Laboratories partnered with Sembit to build a custom mobile app with a real-time web and database backend to surface orders, routing and timing, and print labels in the field.
Why Sembit?
Projects completed
Years in business
Average Years Experience per Employee
Sembit is an Oregon-based software team with deep experience across mobile platforms and the backends that power them. We build native and cross-platform apps, integrate them with existing systems and APIs, navigate the app store submission and review process, and provide ongoing maintenance. Our engineers have shipped apps on iOS and Android for years and are equally comfortable building something new or modernizing an aging codebase. Because we are a smaller, senior-heavy team, you work directly with experienced engineers rather than being handed off to junior staff.
Tell us more about your mobile app development needs.
We can help.
Get expert guidance from Nathan Theophanes (Sembit's President) and Shaun Davidson (Sembit's VP) regarding your mobile app project. We'll be in touch in hours, not days.
We build apps natively for iOS and Android as well as cross-platform with frameworks like Flutter and React Native. We help you choose the right approach based on your budget, performance needs, and how much shared code makes sense. The goal is an app that feels right on each platform without rebuilding the same product twice.
Most mobile apps are only as good as their connection to the systems behind them. We build secure synchronization layers and API integrations so the app stays in step with your servers, including authentication and reliable data syncing. This keeps mobile clients consistent with your web platform and back-office systems.
We implement login, role-based permissions, and member-only access so each user sees only what they should. For sensitive content, we can add protections like document watermarking and secure storage. This makes it safe to put real data and real workflows into your users' hands.
Notifications keep users engaged and informed. We build push notification pipelines and real-time update features so people get timely alerts about the things that matter, from order status to new announcements. Done well, this can significantly improve message deliverability compared to email alone.
Field and frontline users do not always have a strong connection, so we design apps that behave gracefully offline and sync once connectivity returns. We focus on reliability and clean builds so the app keeps working in the real conditions your users face, not just in ideal ones.
We guide apps through Apple App Store and Google Play submission and review, and we keep them compliant as store requirements change. After launch, we maintain and update the app, upgrade dependencies before they become a problem, and keep it deployable so it stays available to your users over the long term.
FAQs About Our Custom Mobile App Development Services
Yes. We handle mobile projects end to end, including design, development, backend integration, app store submission, and long-term maintenance. Most clients come to us for full lifecycle development, and we make sure the first release launches cleanly and keeps running reliably afterward.
Yes. We build for both platforms, either natively or with cross-platform frameworks like Flutter and React Native. We will help you decide which approach fits your budget and performance needs so you get the right balance of shared code and platform-native feel.
Yes. Connecting a mobile app to existing systems is one of the most common things we do. We build secure synchronization and API integrations so the app stays consistent with your servers, web platform, and back-office systems, including authentication and real-time data syncing.
Yes. We have done modernization takeovers specifically to keep apps available when they could no longer be cleanly built or updated. We upgrade dependencies, stabilize builds, produce a deployable release, and guide it through store review so your app stays in users' hands.
Yes. We guide apps through Apple App Store and Google Play submission and review, including the requirements that often trip teams up. We have walked clients through the full approval process and keep apps compliant as store policies change.
Yes. Many clients ask about ongoing support, and the answer is always yes. We update the app, upgrade dependencies before they become a problem, add features as your needs grow, and keep it deployable over the long term. If you prefer, we can hand off support to your internal team.
Yes. We have built apps that are natively multilingual, such as English- and Spanish-native apps, rather than relying on bolted-on translations, and we design with accessibility in mind. This widens your reach and makes the app genuinely usable for everyone it serves.
It depends on your goals. Native can offer the best performance and platform-specific polish, while cross-platform frameworks like Flutter and React Native can save time and cost by sharing code across iOS and Android. We help you weigh the tradeoffs and pick the approach that fits your product and budget.
