Software and app development · St. Louis, Missouri
App development company in St. Louis for health and map-based apps
We are an app development company for St. Louis health plans, care providers and geospatial startups: member portals, care tools, map-based web apps and mobile field apps. A build typically runs $7,000 to around $25,000 to $30,000 with a first release 5 to 10 weeks in, priced in writing after a free 30-minute call. The code is yours, not licensed back.
Written scope and quote after the call. NDA on request. You own the code.
- Time zone
- Central
- Consumer privacy law
- None in force
- Breach notice
- without unreasonable delay
- Typical first release
- 5 to 10 weeks
Teams we have built software for
Book us if your St. Louis app handles member, patient or location data: we design access control and audit logs before the first screen, ship in about 7 weeks and put the code in your name.
Our 16-person engineering team works in-house in San Francisco, backed by 30+ remote specialists, and starts its day two hours after St. Louis, so most of your afternoon is shared time. We have built software for Citi, Spirit Airlines, the Miami Dolphins and Life Line Ambulances.
Which Missouri laws change how your app is built?
The Missouri rules we design consent screens, data retention and breach logging around. A planning summary, not legal advice.
| Rule | What it means for the build |
|---|---|
| Consumer privacy law | No comprehensive consumer privacy law in force as of 2026-10-31. Apps serving users in other states still need to meet those states' rules, and sector laws (health, finance, children) apply regardless. |
| Data breach notification | Mo. Rev. Stat. § 407.1500: notice deadline without unreasonable delay. We build audit logs that show what data was touched, so notice can be accurate and on time. |
| Sales tax on SaaS | not taxable: 12 CSR 10-109.050(3)(I): 'The sale of software as a service is not subject to tax'; customized software not taxable; prewritten software on tangible medium taxable.. Relevant if you will sell your app as a subscription. |
| Time zone | Central. Our team works from San Francisco (Pacific), with remote specialists covering other hours, so St. Louis working hours overlap with ours every weekday. |
Checked 2026-10-31 against state sources; confirm with counsel before launch.
Apps and software we build for St. Louis businesses
| Industry | The problem | What we build |
|---|---|---|
| Health plans and care management firms | Members call to check eligibility and claims, and care managers work from three systems at once. | A member and provider portal with eligibility, claims status, secure messaging and a care manager view, with audit logs from day one. Customer portal development |
| Senior care and transport providers | Facilities request services by phone, and disputes about what was ordered rest on memory. | A structured request app with a written record of every order, the model behind Respond Central's drop from 22 minutes to 3. Mobile app development |
| Geospatial and location-data startups | You have the data, but customers need a simple way to search and act on it. | A map-first web app with search, filters and alerts, like the GoHangars marketplace that reached 1,240 listings in six months. Web app development |
| Research labs and plant science teams | Samples, studies and equipment bookings are tracked in spreadsheets that break as the team grows. | A sample and study tracker with equipment scheduling, mobile capture in the greenhouse and an audit trail. Internal tools development |
Planning something like this in St. Louis? The first call is free and you leave with a clear next step.
Get a free project quoteWhat does it cost to hire our app development company in St. Louis?
$7,000 to around $25,000-$30,000
Our own price for a St. Louis build, project-based or hourly, in writing before any work starts. Design, the build, testing, store launch and a handover in your name are included; the pricing page lists what is in and out.
Why St. Louis health and care teams pick our healthcare app development company
If your app will touch patient or member records, the rules come before the screens. We agree hosting, business associate terms, role-based access and audit logging with your compliance lead in week one, then build customer portals and case tools on that base. For Life Line Ambulances we built Respond Central, which cut the time from transport request to confirmed crew from 22 minutes to 3 for 140 nursing facilities.
With NGA's new campus open in St. Louis, more local startups and contractors are building on location data. We build the commercial side: map search, field capture on mobile and dashboards that turn coordinates into decisions, as we did for GoHangars' 38-state marketplace. Want AI on that data, such as summaries of field notes or an assistant for care managers? Our AI app development team builds it on the same access rules. You get weekly demos, a staging link and, at the end, the code, accounts, a recorded walkthrough and written documentation.
Builds closest to what St. Louis businesses need
All 44 builds →How a build works, from first call to handover
Across our published builds the first release shipped in 5 to 10 weeks, with a median of 7. Integrations and compliance work add more time than screens do. See how long our builds took.
Free 30-minute project call, then written scope and quote, then design you approve, then build with weekly demos, then test and launch, then handover you own, then support when you need it.
Get a free project quoteHow to compare app development companies in St. Louis
Ask every firm on your St. Louis shortlist for a written price, launch times on named projects, who writes the code, and whose name the code and store accounts are in. Our answers: $7k to $30k, a first release in 5 to 10 weeks, Shivam Pujara's in-house team, and everything in your name. The full list is in how to choose a software development company.
What clients say
“They translated very complex operational processes into software that feels simple for our team to use.”
“Communication was clear, timelines were realistic, and the final product matched what was scoped.”
“Working with [our team] was the best decision we made in this process. We went from a 6 month development cycle to a 10 week timeline.”
What do you want to build in St. Louis?
For St. Louis clients we build mobile apps, web apps and SaaS, AI features, custom software, MVPs and CRM setups.
How to hire an app developer in St. Louis: 5 things to settle first
- Are you a HIPAA covered entity or business associate?
If yes, hosting, logging and vendor agreements follow the HHS Security Rule. Settle this before scoping, because it shapes the whole design.
- Which privacy and breach rules apply in Missouri?
Missouri has no comprehensive consumer privacy law, but section 407.1500 requires breach notice without unreasonable delay. Illinois-side users may bring Illinois rules in.
- Is classified or controlled data involved?
We build commercial geospatial software only. If your contract involves classified or controlled federal data, say so on the first call.
- Whose name are the code and accounts in?
Confirm you will own the code, hosting and store accounts. With us it is the default, with a recorded walkthrough and written docs.
- Is the scope and price in writing before work starts?
Screens, integrations, milestones and price on paper before work starts. See pricing or try the app cost estimator.
Engineers you can talk to
16 in-house engineers plus 30+ remote specialists, and 44 published builds with the results each client saw.
Alpit PatelFounder and CEOEngineering is led by co-founder and CTO Shivam Pujara.App development company in St. Louis: questions people ask
How much does it cost to build software in St. Louis?
Our builds usually cost $7,000 to around $25,000 to $30,000. A focused internal tool or portal with one integration is near the low end; a member app with payments, several roles and connections to core systems is near the top. St. Louis clients pay the same as everyone, quoted in writing after a free 30-minute call.
How long does it take to build a portal or app in St. Louis?
Across 44 published builds, our first releases took 5 to 10 weeks, with a median of 7. Respond Central for Life Line Ambulances took 8 weeks. Health projects can add a little time for security review and data agreements, so we lock the timeline in writing after the scope is agreed.
Can you build HIPAA-compliant apps for St. Louis health companies?
We build apps designed to meet HIPAA requirements: role-based access, audit logs, encryption, and hosting on providers that sign a business associate agreement. Your compliance team owns the policies and risk assessment, and we build to them and document how. Infuse CTL and Life Line Ambulances both run healthcare software we built.
How much does it cost to build a healthcare app?
Most healthcare apps we build fall in our usual $7,000 to around $25,000 to $30,000 range. A portal with one integration sits lower; a member app with several roles, secure messaging and connections to core systems sits higher. HIPAA work such as audit logs, access rules and a security review adds time, and the written quote shows it line by line.
How much does it cost to make an app for Apple and Android?
With us, an app for both iPhone and Android usually costs $7,000 to around $25,000 to $30,000, depending on screens, user roles and integrations. The second platform adds work, and the written quote shows how much. Store fees are separate: Apple's developer program is $99 a year and Google Play is a one-time $25 fee, both registered in your name.
What data privacy law applies to an app in St. Louis?
Missouri has no comprehensive consumer privacy act, so federal rules such as HIPAA usually matter more. Missouri's breach law requires notice to affected residents without unreasonable delay. If many of your users live across the river in Illinois, Illinois laws may also apply, and your counsel should confirm which ones.
Can you build a map-based or geospatial app for a St. Louis startup?
Yes, the commercial application layer: map search and filters, location alerts, routing, field data collection and dashboards showing assets or jobs on a map. We use established mapping services and your data rather than building GIS engines, and we do not take classified work. GoHangars runs map search across 38 states.
Can I build an app using AI instead of hiring developers?
For a prototype or an app just for yourself, AI app builders can take you a long way. Once an app holds patient or customer data, takes payments or must pass App Store review, you need engineers who secure, test and maintain the code. Many founders show us an AI-built prototype on the free call, and we scope the production version from it.
Can a San Francisco team handle a St. Louis project remotely?
Yes. St. Louis is two hours ahead of us, so we share about six working hours a day, and our remote specialists extend that around launches. You get a weekly demo, a staging build and one project lead. We have no St. Louis office and work entirely over video.
How do I choose a software development company in St. Louis?
Ask for published builds with named clients and results, especially in your sector, and ask who writes the code. Get scope and price in writing before work begins, and make sure code and accounts end up in your name. A local or remote team can do the job, so judge on those answers.
More answers from our engineers
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Free project call
Building an app in St. Louis? Pick a time for your free call.
Tell us what you want to build, then choose a 30-minute slot. You leave the call with the scope, the risks and a realistic timeline, and a written quote follows. Typical builds run $7,000 to around $25,000-$30,000.
- A written scope and price before any work starts
- First release in 5 to 10 weeks on our 44 published builds
- Code and accounts in your name from the first commit
- NDA on request, signed before you share details
Rather write it down? Send us your brief or email info@aibrevo.com.
- Details
- Time
- Confirmed
Free project call with Alpit Patel
Pick a day
You are booked.
Before the call
- Accept the calendar invite so the call sits in your calendar with the Meet link.
- Jot down what the app should do: who uses it, the three or four things it must handle, and any deadline.
- Have examples handy: apps you like, sketches or screenshots, and the tools it needs to connect to.
Need a different time? Reschedule or cancel.









