Mobile App Development · United States

Mobile App Development Company USA

A remote team building iOS and Android apps for US companies, from App Store submission through HIPAA and COPPA requirements where they apply.

Get a project estimate Talk to a developer

NDA on request · Free, no-obligation estimate · Reply within one business day

Lower Manhattan skyline across the Hudson River at blue hour

Person holding a smartphone with an app open beside a laptop and notebook

NDA before discovery

You own the code and IP on payment

Code in your repository from day one

A working demo every two weeks

Senior engineers do the work

How we work

A mobile app built for the US market has to clear a review process before it reaches a single user: Apple's App Store review and Google Play's policy review both reject apps for reasons that have nothing to do with whether the code works, disallowed data collection, missing privacy labels, broken account deletion flows. A mobile app development company working with US businesses treats that review as a build requirement from the start, not a surprise during submission week.

The compliance surface changes sharply depending on who the app is for. A health app collecting data through HealthKit sits under HIPAA if it's built for a covered entity or its business associate. An app that could reasonably attract users under 13 sits under COPPA regardless of who it was designed for. Getting that classification right at the start of the project changes the data model, the analytics setup and the account creation flow.

Market

What buyers in the USA need from this work

App Store and Play Store review as a build constraint
Apple's App Tracking Transparency prompt, required privacy nutrition labels, and Google Play's data safety section all need accurate answers before submission, and getting them wrong is one of the most common causes of a rejected build. We map data collection against these requirements during development rather than filling out the forms the week of launch.
HIPAA for health-adjacent apps
An app reading from HealthKit, storing symptom logs, or connecting a patient to a provider is built around a business associate agreement, encrypted local storage, and audit logging on any access to protected health information, the same control set a web-based health system would need.
COPPA for apps that could reach children
Education apps, family apps and games commonly fall under COPPA even when the primary audience is adults, since a child could plausibly use the app. That means verifiable parental consent, no behavioral ad targeting toward a known child user, and a data model that avoids collecting more than the product needs.
Apple Pay, Stripe and in-app purchase rules
US users expect Apple Pay or Google Pay at checkout inside a native app. Where the app sells digital content consumed inside the app, Apple and Google's in-app purchase rules apply instead of a third-party processor like Stripe, a distinction that has to be settled before the payment flow is built, not after submission is rejected for it.

Compliance we plan for

HIPAA and HITECH for apps handling protected health information
COPPA for apps reasonably likely to reach users under 13
CCPA/CPRA disclosures for data collected through the app
Apple App Tracking Transparency and Play Store data safety requirements

How the engagement runs

Mobile projects for US clients are typically scoped as a fixed-price build through the first App Store and Play Store submission, covering design, native or cross-platform development (Flutter or React Native, depending on the team's existing stack) and the review process itself. IP assigns to the client on payment, including the App Store Connect and Play Console listings, which are set up under the client's own developer accounts from the start rather than transferred later.

Standups run inside US business hours, and submission windows are planned around Apple's review turnaround so a launch date isn't set against an unpredictable review queue.

Industries

Industries we often work with here

FAQ

Frequently asked questions

How long does a HIPAA-compliant health app take to build for the US market?

A first release typically takes four to six months, longer than a comparable non-health app because of the time spent on encrypted storage, audit logging and a business associate agreement with any third-party service the app touches, all of which need to be right before the app handles a single real patient record.

Why did our app get rejected during App Store review?

The two most common reasons are an inaccurate privacy nutrition label (the declared data collection doesn't match what the app actually does) and a missing account deletion flow, both of which Apple checks explicitly. We build the label and deletion flow alongside the feature that triggers them so submission doesn't surprise anyone.

Does our app need to comply with COPPA if it's not designed for kids?

If children under 13 could plausibly use it, education and family-category apps especially, COPPA applies regardless of the intended audience. We check this classification early since it changes consent flows, ad targeting and what data the app is allowed to collect.

Can we use Stripe for payments inside an iOS app?

Only for physical goods or services consumed outside the app; digital content consumed inside the app has to go through Apple's in-app purchase system under App Store rules. We settle which category your product falls into before the payment flow is built.

Do you build for iOS and Android separately or with one codebase?

Most projects use Flutter or React Native to share one codebase across both platforms, reserving native Swift or Kotlin for apps that need deep platform-specific integration, like advanced HealthKit or background location work, where a shared codebase would fight the platform rather than help it.

Who owns the App Store Connect and Play Console accounts?

You do. The app is published under your own developer accounts from the first submission, so there's no transfer step later and no dependency on our account to keep your app live.