CATAPULTAI WORK
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ANDROID / IOS / CROSS-PLATFORM

Affordable mobile app development agency for U.S. businesses

We build Android, iOS, and cross-platform apps for U.S. businesses. We help you choose the platform, design the core user journey, and connect the app to its backend and business tools. Testing, store submission support, and any post-launch maintenance are agreed before development starts.

For customer or field-team tasks that belong on a phone

Hands comparing a smartphone interface with the matching laptop prototype
Priority 01A clear, useful first release
01 / Mobile UX & platform plan02 / App development & backend APIs03 / Device tests & release handoff
100+projects delivered over the last 8 months

#1 PRIORITY

A complete, useful first release that your team can review, launch, and own.

EXPERIENCED SPECIALISTS

A team made up of people with extensive technical experience in their fields.

PERSONAL GUIDANCE

Direct, practical guidance through planning, technical decisions, delivery, and launch.

WHAT WE DELIVER

What we build

01

Android applications

02

iOS applications

03

Cross-platform apps

04

App backends and integrations

PLATFORM CHOICE

Choose the platform around your users and features

A shared codebase can suit an app needed on both Android and iOS. A native build may be better when the product depends heavily on a particular device or platform. We compare those needs, development effort, and maintenance before choosing.

01iOS applications

An iOS-specific build may fit products that need deep Apple-platform behavior, native interface control, or an independently managed platform roadmap.

02Android applications

An Android-specific build may fit products with Android-first users, device or hardware requirements, or a platform-specific operational context.

03Cross-platform applications

A shared codebase can reduce duplicated delivery for suitable products, while platform-specific code remains possible where an API or experience requires it.

APP CAPABILITIES

Connect the app to the work behind each screen

A booking screen needs available appointments from a backend. A customer account needs secure sign-in and access checks. We plan these connections with the interface so the app can complete the whole task, not just display it.

01

Identity and permissions

Authentication, account recovery, sessions, roles, secure local storage, and server-side authorization are designed around the approved users and risk.

02

APIs and business systems

Apps can connect to an approved backend, CRM, ERP, payment provider, content service, or third-party API when access and integration behavior are confirmed.

03

Notifications, payments, and device features

Push notifications, payments, camera, location, uploads, or other device capabilities are included only when the product workflow and permission model justify them.

Hands comparing a smartphone interface with the matching laptop prototype
Illustrative photography · Daniel Korpai

EXAMPLE ENGAGEMENT

Help a field team finish a job from their phone

01 / Your starting point
An assigned job, its checklist, and the information needed on-site.
02 / What we build
An app for viewing the job, recording progress, and syncing agreed updates.
03 / What you receive
A tested app, release guidance, and documented offline behavior where included.

Illustrative scope, not a client case study or fixed-price package.

RELIABILITY & RELEASE

Prepare for real devices, weak signals, and launch

We test the agreed user journeys on the supported devices, including denied permissions, connection failures, and upgrades. If offline use is required, we define what users can do without a connection and how changes sync when they reconnect.

Offline and unreliable networks

Where the product needs it, we define what remains available offline, what is queued, how conflicts are handled, and how the user sees sync state.

Device and release testing

The agreed device range, operating-system versions, accessibility, performance, permissions, integration failures, and upgrade paths are reviewed before release.

Store launch and maintenance

Scope can include build preparation, listing assets, privacy information, submission guidance, crash monitoring, technical review feedback, and an agreed post-launch support period.

DELIVERY

From a clear scope to a reviewable launch

The exact activities change with the service, but every project needs explicit decisions, working review points, acceptance criteria, and an owner for what happens after launch.

  1. STEP 01

    Define users and mobile context

    Agree platforms, devices, connectivity, critical tasks, data sensitivity, backend needs, and the reason the workflow belongs in a mobile application.

  2. STEP 02

    Design the product and backend

    Plan navigation, key flows, permissions, API contracts, offline behavior, notifications, analytics, and release responsibilities.

  3. STEP 03

    Build and test working slices

    Review the application on representative devices while backend, integrations, error states, accessibility, and performance are developed.

  4. STEP 04

    Prepare release and support

    Complete acceptance testing, store requirements, privacy details, monitoring, rollout planning, documentation, and agreed post-launch support.

PROCESS & INTERFACES

See how the work is organized before you commit.

See what happens at each project stage and what you will review. You can also try our interface concepts to explore the design and interactions. The concepts are demonstrations, not client case studies.

SCOPE-BASED PRICING

Get an estimate for your mobile app project.

Contact us for pricing

Tell us what you need to build, what you already have, and your budget and timing. We will explain the recommended first version, what the quote includes, and which features can wait.

Send your brief

COMMON QUESTIONS

Questions about android & ios applications

Find answers about scope, cost, and working with us. For a question about your project, send us a brief through the project form.

01Do you build for both Android and iOS?

Yes. We can build Android, iOS, or cross-platform applications based on target users, device capabilities, performance, interface requirements, ownership, timeline, and budget.

02Can the mobile app connect to our existing system?

Potentially. We review existing APIs, authentication, permissions, data ownership, rate limits, and error handling before confirming connections to CRM, ERP, payment, content, or other systems.

03Do you support app-store release?

Yes. Release support can include testing, build preparation, store assets, privacy information, submission guidance, and technical review feedback within the agreed scope.

04Can an app work offline?

Yes, when offline use is designed deliberately. We define which data is stored on the device, what can be changed offline, how it synchronizes, and how conflicts or failures are shown to the user.

05How is a mobile app project priced?

Contact us for pricing. Scope depends on platforms, product flows, backend and admin needs, integrations, device features, offline behavior, security, testing, release work, and support.

READY WHEN YOU ARE

What are we building?

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