Mobile App Development Company in Boston

A regulated category is what moves a Boston app budget a whole tier, not the platform count. Builds land as a scoped Boston mobile MVP over twelve to eighteen weeks, covering one platform (iOS or Android), a backend, authentication, push, payments, and an analytics layer, a dual-platform native build with a non-trivial backend, offline mode, and meaningful integrations, or a regulated mobile app (HIPAA healthtech, licensed daily fantasy or sports betting in the DraftKings pattern, a fintech with KYC and AML), which sits higher because of the compliance, geolocation, identity verification, and audit work the category requires. Boston rates sit above most US metros because of the DraftKings, Toast, Wayfair, and HubSpot talent premium and the regulatory overhead that sports betting and healthtech work carry. We give fixed-fee proposals rather than open time and materials estimates so your finance team can plan against an actual number.

Massachusetts is a strict two-party consent state under M.G.L. c. 272 section 99, the Massachusetts Wiretap Statute. Any mobile feature that records voice calls, captures ambient audio, transcribes a meeting, or even buffers audio for a voice assistant has to obtain affirmative consent from every party on the call before recording begins, and the rule has more teeth than the federal Wiretap Act. Our Massachusetts mobile engagements treat this as a first-class architectural concern. We design audible and visible consent prompts at the start of any recording, we log consent events with timestamps and device identifiers for evidentiary purposes, we route audio capture through clearly bounded code paths so a security review can find them, and we surface a documented privacy notice that names section 99 specifically. This is the regulation that most out-of-state founders miss until their counsel flags it during diligence.

Yes, in jurisdictions where the client holds licensure. We build mobile sports betting and daily fantasy apps under the Massachusetts Gaming Commission framework for in-state operators and the patchwork of other state regulators where the client is licensed. The build includes geolocation enforcement through a GeoComply-style provider with strict checks at session start and at each wager, KYC and identity verification at signup with document and selfie capture, AML monitoring on deposits and withdrawals, responsible gaming controls (deposit limits, time limits, self-exclusion tied to state registries), age verification, and jurisdictional routing that disables features in unlicensed states. We have studied the DraftKings public engineering blog posts and conference talks on these problems and we build to that bar. We do not build offshore or unlicensed sportsbook apps under any commercial pressure.

Boston’s healthtech mobile work, whether a patient-facing companion app for Mass General Brigham, a clinical trial engagement tool out of Kendall Square, or a chronic condition management product, lives inside HIPAA from day one. We sign a Business Associate Agreement before any PHI touches our infrastructure, stay inside the HIPAA-eligible AWS service catalog (Cognito, AppSync, Lambda, DynamoDB, Aurora, S3 with encryption, KMS, CloudWatch with PHI-safe logging), keep PHI inside US regions, and design the mobile client so PHI is encrypted at rest in the iOS Keychain and Android Keystore. We also produce an App Store privacy nutrition label and a Play Data Safety form that accurately describes PHI handling, plus a 201 CMR 17 WISP update that covers the mobile and backend stack together. Final HIPAA risk analysis stays with your privacy officer; we build the engineering controls that make their sign-off defensible.

A focused single-platform MVP takes twelve to eighteen weeks from kickoff to App Store or Play submission. A dual-platform native build with a real backend lands at twenty to twenty-eight weeks. A regulated app (HIPAA, licensed sports betting, fintech with KYC and AML) lands at twenty-six to forty weeks because the compliance, geolocation, identity verification, and audit work runs in parallel with feature development and gates the launch. We ship to TestFlight and Play Console internal track every Friday from week two onward so your Boston-based product owner is testing the actual app on a real device weeks before launch, not after. Apple App Review and Google Play Review timelines add three to ten days each, and we pad the plan for at least one App Review rejection cycle because Apple is unpredictable about ATT and IAP edge cases.

Both, and we pick the right tool per engagement. Native Swift and SwiftUI on iOS plus native Kotlin and Jetpack Compose on Android remain the right call when you need maximum performance (gaming, AR, real-time video), deep platform integration (HealthKit, CarPlay, Live Activities, WidgetKit, App Clips on iOS, Health Connect, Wear OS, Auto on Android), or the absolute best App Store and Play review experience. React Native on the new architecture (Fabric, TurboModules) is the right call when you have a strong web React team and the feature surface is mostly forms, lists, and standard navigation. Flutter is the right call when design fidelity across platforms is paramount and the team has Dart appetite. We do not push one stack ideologically. We pick based on the team you have, the platform features you need, and the five-year maintenance cost.

Submission is part of the engagement, not an afterthought. We submit through App Store Connect and Google Play Console under the client’s developer accounts, write App Review notes that explain regulated flows (HIPAA login, geolocation gating for sports betting, age gates), pre-build privacy nutrition labels and Play Data Safety forms during development rather than the week before submission, and pad the plan for at least one rejection cycle. Apple App Review rejections on App Tracking Transparency, in-app purchase routing, and account deletion flow are the most common surprises and we know the patterns that get apps unstuck. Google Play policy strikes around data handling and background location are equivalent on the Android side. We hand over signed release builds, App Store Connect access, and a documented release runbook so your team can ship updates after handover without re-engaging us.

Massachusetts 201 CMR 17.00 requires every company that owns or licenses personal information about a Massachusetts resident to maintain a documented Written Information Security Program (WISP) covering administrative, physical, and technical safeguards, plus encryption of personal information in transit and at rest on portable devices, vendor oversight, and incident response. For a mobile app that means encrypted storage in the iOS Keychain and Android Keystore (not raw UserDefaults or SharedPreferences) for anything containing personal information, TLS 1.2 or higher on every network call with certificate pinning for high-sensitivity workloads, a documented vendor management entry for every analytics, crash reporting, and push notification provider, and a documented incident response plan that names the mobile stack specifically. Our Massachusetts engagements ship with a 201 CMR 17 risk classification and an attached WISP update so your compliance lead can answer an Attorney General inquiry without scrambling.