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DFY Games
Functional apps · Quote-led

Custom app development services for customers, members and teams

We offer custom app development services for businesses that need a focused mobile app: booking, membership, marketplace MVPs, internal tools and more. Each custom app development project goes from a clear brief to a tested iOS and Android product. Tell us what the app needs to do and we will map the right scope.

No fixed price. Every app gets a written scope with assumptions, timeline and quote.

Example flows

Input, action, outcome.

Three unbranded examples of how a focused app changes a real workflow.

Appointment and booking

A salon fills its quiet hours

  1. InputClient picks a service and an open slot
  2. ActionApp holds the slot, takes a deposit and books the calendar
  3. OutcomeReminder 24 hours before; no-shows drop, staff see the day at a glance

Internal operations

A field team stops losing checklists

  1. InputTechnician scans a site code and works through the checklist offline
  2. ActionPhotos and signatures sync when the signal returns
  3. OutcomeThe office gets a complete report the same day

Membership / community

A club turns members into regulars

  1. InputMember checks in at the door with their phone
  2. ActionVisit is logged and a perk unlocks after the fifth visit
  3. OutcomeMembers see progress; the club sees who is drifting away
How scope works

A clear path from brief to store.

  1. 1DiscoveryWe turn your brief into user flows, a screen list and the integrations that matter.
  2. 2PrototypeA clickable flow you can try on a phone before anything is built for real.
  3. 3BuildiOS and Android from one agreed project, in reviewed checkpoints.
  4. 4IntegrationsPayments, calendars, CRMs or your own systems, connected and tested.
  5. 5QADevice coverage, edge cases, accessibility and a release checklist.
  6. 6StoreStore listing, privacy disclosures and submission support for both stores.
What changes price

Seven things move the quote.

  • ScreensHow many distinct screens and states the app needs.
  • BackendWhether data lives only on the phone or on a server you own.
  • AccountsSign-in, roles and permissions add flows and security work.
  • PaymentsTaking money once, on a schedule or between two sides.
  • IntegrationsEach external system is its own build and test surface.
  • AdminA dashboard for your team to manage content, users or orders.
  • ComplianceHealth, finance, children's or location data need extra review and safeguards.

Ownership

After full payment, you receive the project files and the original assets created for your app. Third-party services, SDKs, fonts and licensed assets remain subject to their own license terms, and accounts like your developer, hosting and payment accounts stay in your name.

MVP app development

MVP app development: a first release real users can test.

If you are looking for an MVP app development company, this is how we scope a first release. An MVP from us is the smallest version of your app that real users can install and use for its one main job, so you learn whether the idea works before you pay for everything else.

What the first release includes

  • One core workflow, built end to end, for the main type of user
  • iOS and Android builds from one agreed project
  • Sign-in, payments or a simple admin only where that workflow needs them
  • The integrations the workflow cannot run without, connected and tested
  • QA on real devices, plus store listing and submission support for both stores

What it leaves out

  • Secondary features that can wait until users ask for them
  • Extra user roles, regions or languages beyond the first market
  • Advanced reporting, dashboards and automation
  • Integrations with systems the first users never touch
  • Ongoing maintenance and new features, which can be added as a separate agreement

When an MVP is the wrong choice

  • An existing product already does the job well enough. Buy it and spend the budget on finding users.
  • The app handles health, finance or children's data. Compliance work does not shrink for a first release, so it starts with a manual review.
  • You are replacing a system your team relies on every day. A cut-down version can stop work, so scope the full workflow instead.
  • You only need to test demand. A landing page or a clickable prototype answers that faster than a store release.

Timing depends on screens, backend and integrations. A clear, small first release can move quickly; your written scope includes a timeline with checkpoints before any work starts.

Every MVP gets a written scope with assumptions, timeline and quote. Request a quote, or read the mobile app development cost guide to see what moves the number.

Request an MVP quote
The questionnaire

One question per screen. Save and come back any time.

About four minutes. Conditional questions only appear when they matter, and if your app handles sensitive data, we say so up front instead of guessing at a price.

FAQ

Timelines, stores, code and budget.

How long does an app take?

It depends on screens, backend and integrations. A clear, small utility can move quickly; apps with accounts, payments or several integrations take longer. Your written scope includes a timeline with checkpoints before any work starts.

Will it be on the App Store and Google Play?

We prepare the store listing, privacy disclosures and builds, and support submission. Store review and approval are controlled by Apple and Google, and the developer accounts stay in your name.

Can you work with our existing code or design?

Often, yes. Tell us what exists in the questionnaire. We review it during discovery and say plainly whether extending it or starting fresh is the better path.

What happens after launch?

Your scope states the bug-fix window after delivery. Ongoing maintenance, OS updates and new features can be added as a separate agreement.

Why is there no fixed price?

Functional apps vary too much: a calculator and a two-sided marketplace are different products. We would rather send a written scope with assumptions, timeline and quote than a number that changes later.

Receive a written scope and quote.

Answer a few questions; it takes about four minutes. You will get either a short clarification or a written scope path with assumptions, timeline and quote.

Request a build quote

Building a game instead? See the game packages

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