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Devlumio

Service

Mobile App Development

Build one useful phone app for your business or personal project. App Essentials covers a standalone offline workflow across up to five screens. App Launch adds accounts and a small managed backend across up to eight screens. Both use one React Native/Expo codebase for iPhone and Android phones, one language, and your supplied branding and content. Provider fees are separate, and store approval depends on each platform’s policies.

Mobile app packages

One useful idea. In your customers’ hands.

Mobile apps for businesses and individuals worldwide. Two focused starting points for a standalone tool or an app with personal accounts.

One scope. The same price.Introductory, one-time build fees in USD for businesses and individuals alike.

App Essentials

A useful offline app for one focused task, with your data saved on the device.

$4,500

USD · one-time build fee

Separate client costsDeveloper accounts, build services, backend, hosting, email, and other provider fees are paid separately through your own accounts.

  • One shared iPhone and Android phone app, in one language
  • Up to 5 screens for one agreed user journey
  • Interface design using your supplied branding and content
  • Local device storage, without accounts or cloud sync
  • Test builds checked against an agreed device and OS matrix
  • Store listing preparation and initial submission support
  • Source code, setup notes, and a 45-minute handover
Build estimate
Approximately 4–6 weeks
Refinements
One consolidated design revision round
Enquire about App Essentials

App Launch

A focused connected app with user accounts and a small backend for personal records.

$9,500

USD · one-time build fee

Separate client costsDeveloper accounts, build services, backend, hosting, email, and other provider fees are paid separately through your own accounts.

  • One shared iPhone and Android phone app, in one language
  • Up to 8 screens for one agreed user journey and one user role
  • Interface design using your supplied branding and content
  • Email/password accounts with verification and password reset
  • Up to 3 simple record types with 10 fields each, private to each user
  • Account deletion in the app and a deletion-request web page
  • Test builds, listing preparation, and initial submission support
  • Source code, setup notes, and a 60-minute handover
Build estimate
Approximately 7–10 weeks
Refinements
Two consolidated design revision rounds
Enquire about App Launch

These links start a package enquiry. We confirm suitability, scope, account eligibility, initial store regions, quote, and schedule together before any payment or work begins. Worldwide service does not guarantee worldwide app availability; distribution depends on provider requirements.

Package scope and launch

A clear route from idea to submission.

One app, two phone platforms
One shared codebase covers iPhone and Android phones in one language, using your supplied branding and content. Test builds are included; we agree supported OS versions, devices, and testing before kickoff.
Screen and workflow allowances
The five- or eight-screen limit includes login, password reset, settings, and account-deletion views where applicable. Shared screens count once across platforms. One core workflow means one agreed journey, such as recording and reviewing personal tasks.
Simple, personal records in App Launch
App Launch covers one user role and up to three types of private, user-owned records, with up to ten simple fields per type. Users can create, view, edit, and delete their own records. It also includes in-app account deletion and a deletion-request web page outside the mobile screen allowance.
Your materials and accounts
You supply final content, branding, approved policies, listing text, and account access. We prepare screenshots and listing/privacy-data forms from your approved information. You complete developer enrollment and identity checks. See current Apple enrollment requirements and Google Play account requirements.
Submission and one correction round
One initial submission per store and one correction/resubmission round per store are included for agreed-scope implementation issues reported within 30 days of that store’s initial submission. Store approval and approval dates cannot be guaranteed.
Store testing and reviews
You recruit any required closed-test participants. Required testing windows and store review time sit outside the build estimates. Check the current Google Play testing requirements before planning your launch date.
Two payment milestones
50% at kickoff. The remaining 50% is due after you approve the preview, before initial store submission and handover.
A schedule we agree together
Estimates begin after we receive complete inputs, account access, and your deposit. Timely, consolidated feedback keeps the agreed build schedule moving.
Your app, handed over
Code and account handover follow final payment, with the included walkthrough. For 14 days after handover, fixes for failures against the agreed scope are included. Ongoing OS updates and maintenance are quoted separately.

How we work

A shared view of the work

A practical starting point for the process. Milestones and reviews are tailored to the scope.

  1. Discover

    Understand the problem, review the starting point, and define a useful scope.

    Example output

    A proposed scope, budget, and milestone plan

  2. Design

    Make the important flows and decisions visible before building them out.

    Example output

    Agreed designs or technical approach for the scoped work

  3. Develop

    Build in agreed milestones, with work available for review along the way.

    Example output

    An implementation reviewed against the agreed acceptance criteria

  4. Launch

    Prepare the release and complete the handover defined in the agreement.

    Example output

    The agreed release and handover, with next steps documented

Also available

Other things we build

  • Website Design & Development

    Focused website packages for businesses, freelancers, consultants, creators, and personal portfolios worldwide.

  • Custom Software Development

    Plan one workflow or build a focused private web tool for your business or personal project, with clear package limits and introductory USD fees.

  • Game Development

    Focused 2D single-player game packages for browser or one desktop platform, with source files and introductory USD fees for clients worldwide.

  • Online Store Design & Setup

    Shopify store setup for businesses and individuals worldwide, with clear product limits, standard checkout, and separate platform fees.

Your next step

Ready to talk about your mobile app development project?

Tell me what you want to make, who it is for, and what you need it to do. That is a useful place to start.