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Reverse Lab

Development & Operations Services

Mobile App Development Services

Mobile interfaces for devices, instruments, and field operations. Engagements include iOS app development, Android app development, and related work — all under NDA.

  • iOS app development
  • Android app development
  • cross-platform app development
  • React Native development
  • Flutter development
  • mobile application development
Under NDACustom scopingGlobal delivery

Overview

About Our Mobile App Development Services

Mobile app development services for iOS and Android. Native and cross-platform apps built with security-first principles by experienced engineers.

Engagements are scoped to a fixed deliverable list before kickoff and run under a written NDA. Daily lab notes and weekly written status keep the work auditable from your side at every step.

On the device

Real devices, real engineers, real reviews — never a stand-up demo.

Mobile Practice Lead — anonymized portrait

Mobile Practice Lead

Anonymized pre-NDA

How we work

How we work

Engineering decisions, not reused templates

Every engagement starts from the operational requirement, not a stock catalog. When reverse engineering is part of the work, we adapt and improve — never blind-copy — so the deliverable fits the customer's actual task rather than imitating prior art that may have been built against a different problem.

Engineering analysis

Mathematical & physical modeling, where the project needs it

As part of both reverse engineering and custom development projects, we perform in-depth engineering analysis based on mathematical and physical modeling. Depending on project requirements this may include structural calculations, fluid dynamics, gas flow analysis, thermal processes, stress and load simulations, process modeling, and validation of engineering assumptions affecting system performance and operational reliability — used for design verification, technology assessment, process optimization, and validation of technical parameters for production and commercial deployment.

When you call us

When You Need Mobile App Development Services

Patterns we see across engagements. Each can stand alone or combine with adjacent capabilities.

  • iOS app development for B2B and enterprise

    Native Swift and SwiftUI applications for iPhone and iPad with deep integration into enterprise identity and data systems.

  • Android app development for production fleets

    Native Kotlin and Jetpack Compose applications, including OEM device fleets and managed enterprise deployments.

  • Cross-platform app development with React Native and Flutter

    Single-codebase applications targeting iOS and Android with native performance where it matters and shared logic everywhere else.

  • Mobile application development for connected hardware

    Companion apps for IoT and embedded products with BLE, WiFi-direct, USB, or proprietary radio integration.

  • Secure mobile applications for regulated industries

    Health, finance, and defense-grade mobile apps with verified secure storage, certificate pinning, and audit-grade logging.

  • Mobile app modernization and replatforming

    Migrate legacy mobile apps from outdated frameworks (Cordova, native UI on old SDKs) to current, maintainable stacks.

Methodology

Our Mobile App Development Services Process

Vertical phasing — each step's deliverables agreed before kickoff, and not closed until you sign off.

  1. 01

    Phase 01

    Discovery

    Two-week paid discovery: requirements clarification, platform decision (native vs. cross-platform), backend integration analysis, and a fixed scope letter.

  2. 02

    Phase 02

    Foundation

    Repository, CI/CD with TestFlight and internal testing tracks, observability, and security baselines before the first feature.

  3. 03

    Phase 03

    Iterative delivery

    Two-week sprints with demoable build at every sprint close. Beta distribution to your team throughout the build.

  4. 04

    Phase 04

    Store submission

    App Store and Play Store submission with privacy declarations, review handling, and post-approval validation.

  5. 05

    Phase 05

    Stabilization

    30-day post-launch support window. Crash analytics review, performance tuning, and small-fix releases.

Stack

Our Tech Stack

The languages, frameworks, and infrastructure we use in production. We don't list anything we aren't shipping with.

  • Tool

    Swift / SwiftUI

    Production use — versioned per-engagement and pinned in our build.

  • Tool

    Kotlin / Jetpack Compose

    Production use — versioned per-engagement and pinned in our build.

  • Tool

    React Native

    Production use — versioned per-engagement and pinned in our build.

  • Tool

    Flutter

    Production use — versioned per-engagement and pinned in our build.

  • Tool

    Expo

    Production use — versioned per-engagement and pinned in our build.

  • Tool

    Firebase

    Production use — versioned per-engagement and pinned in our build.

  • Tool

    Xcode

    Production use — versioned per-engagement and pinned in our build.

  • Tool

    Android Studio

    Production use — versioned per-engagement and pinned in our build.

  • Tool

    Fastlane

    Production use — versioned per-engagement and pinned in our build.

  • Tool

    Sentry / Bugsnag

    Production use — versioned per-engagement and pinned in our build.

mobile@build-rig ~ app

$ fastlane ios beta && fastlane android internal

TestFlight: build 142 · Play internal: 0.4.1

$ xcrun simctl install booted Build/AppName.app

Installed · launch time 1.1s · crash-free 99.96%

$

Deliverables

What You Receive from Our Mobile App Development Services

Artifacts handed over at close-out. Each is reproducible and self-contained.

  • Production-ready iOS and/or Android application
  • App Store and Play Store-approved submission packages
  • CI/CD pipeline with automated TestFlight / Play internal track distribution
  • Crash analytics and observability instrumentation
  • Security review aligned to OWASP MASVS
  • Runbook covering release, hotfix, and support escalation

Sample deliverable

mobile-app-development · final report

rev.04 · pdf

Engagement summary

Findings

Our practice

Senior mobile engineers, native-first, through approval.

Native Swift / Kotlin where the platform matters. React Native / Flutter where shared logic helps. App Store and Play Store submissions are part of every engagement.

Mobile engineer working through TestFlight build distribution

Native depth

iOS and Android first; cross-platform when project shape calls for it. App Store and Play Store handled end-to-end.

Anonymized senior engineer — Mobile Practice Lead

Mobile Practice Lead

Anonymized pre-NDA

Anonymized senior engineer — iOS Lead

iOS Lead

Anonymized pre-NDA

Anonymized senior engineer — Android Lead

Android Lead

Anonymized pre-NDA

Anonymized senior engineer — Cross-Platform Engineer

Cross-Platform Engineer

Anonymized pre-NDA

Mobile is harder than it looks. We default to OWASP MASVS and ship through store approval, not over the wall.

Mobile Practice Lead, Reverse Lab

Questions

Mobile App Development Services FAQ

Pulled from real client conversations. If yours isn't here, ask directly.

  • Our mobile app development services cover end-to-end iOS and Android development: native Swift / SwiftUI for iOS, native Kotlin / Jetpack Compose for Android, and cross-platform options in React Native and Flutter where the platform mix and feature set make a single codebase a better fit. We handle App Store and Play Store submission as part of every engagement.

  • Yes. Native iOS app development in Swift / SwiftUI and Android app development in Kotlin / Jetpack Compose are core capabilities. Native is the right choice when platform-specific UI, peripheral access, or performance matters. We help you decide native vs. cross-platform during discovery.

  • Cross-platform app development with React Native or Flutter is the right choice when your app is largely UI and business logic, the feature set is comparable across platforms, and shared code reduces total development time meaningfully. We do not recommend cross-platform for apps that are heavy in native graphics, AR, or specialized hardware integration.

  • Yes. Companion apps for connected hardware are common — BLE, WiFi-direct, USB, NFC, and proprietary radios. Our reverse-engineering practice means we can also reverse-engineer the device's protocol when documentation is insufficient and produce both the device specification and the companion mobile application.

  • Mobile applications inherit a defined attack surface. Our security baseline aligns to OWASP MASVS: certificate pinning, secure secure-enclave / keystore use for credentials, no secrets in source, and obfuscation where the threat model justifies it. For regulated industries we extend the baseline to match your compliance posture.

  • Yes. Submission is part of every engagement. We handle App Store privacy declarations, App Tracking Transparency, age rating, review preparation, and Play Store data safety declarations. We engage with reviewer feedback and re-submit through approval.

  • React Native and Flutter performance is fine for most app categories. Where performance becomes the constraint — heavy graphics, sustained background work, complex animation — we evaluate native modules within the cross-platform shell, or recommend native development outright. We do not commit to a stack until the performance question is answered.

  • Post-launch support runs as a separate engagement. Most clients move from build engagement into a maintenance engagement covering OS-version upgrades, library updates, store re-submissions, and small feature work. Larger ongoing development moves into our standard custom software development services.

  • Project pricing depends on scope, platform mix, and team composition. We offer fixed-bid for well-bounded scopes and time-and-materials for exploratory or evolving products. Discovery is paid; the resulting scope letter sets the engagement model.

Selected work

Engagements where this capability carried significant scope.

Case studies for this service available under NDA

Most of our work in this area is covered by mutual NDA. Request anonymized references during your inquiry — we share them with prospective clients after NDA execution.

Engage

Ready to discuss your mobile app development services project?

All inquiries reviewed under NDA. We respond within two business days with a scoped engagement plan and fixed deliverables list.

Senior engineers · Anonymized pre-NDA