VITON13 / Focused service

Mobile app development for iOS and Android

Mobile app development for iOS and Android in 15–30 working days, from $213 AI-assisted / $313 human-led: 1 shared codebase released as 2 apps around the 1 customer journey that matters first, with its product architecture, failure checks on representative phones, the store release workflow and a written completion note. The final estimate depends on user roles, integrations and platforms. The price includes 2 revision rounds per delivered stage.

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In short

What does Cross-platform mobile app development include?

Cross-platform mobile app development starts at USD 213 with AI-assisted production or USD 313 with a human-led route; typical delivery is 15–30 working days; final estimate from the brief: user roles, integrations and platforms.

Includes 2 revision rounds per delivered stage; VITON13 confirms the scope in writing.

Starting price$213Final estimate from the briefAI-assisted$313Human-led
Delivery window15–30 working days2 revision rounds per delivered stageFinal estimate from the brief: user roles, integrations and platforms
Primary deliverable1 priority customer journey, built first and working on both platforms before anything else is added

What you get and on what terms

Cross-platform mobile app development

AI-assistedfrom $213

Human-ledfrom $313

Final estimate from the brief: user roles, integrations and platforms

Timeline
15–30 working days
Revisions
2 rounds per delivered stage
Included
only the deliverables listed in the agreed package
Not included
external costs and work outside the agreed scope
From you
brief, current materials and any access needed for this scope
You receive
listed deliverables plus a written completion note
Get a proposal

Prices in USD; other currencies are approximate. Scope, revisions and dates are written into your estimate.

Who it is for

A business whose customers already reach for their phones to book, order, track or pay, and which needs one dependable app on both iPhone and Android around that first journey rather than a long feature list on day one.

What is included

  • 1 priority customer journey, built first and working on both platforms before anything else is added
  • 1 mobile product architecture: data, permissions, offline states and the device features that journey needs
  • 1 shared codebase released as 2 apps, one for iOS and one for Android
  • 4 failure checks on representative phones: a denied permission, an interrupted session, a weak network and store review
  • 1 store release workflow with signed builds and a release package that can be rebuilt for every new version
  • 1 written completion note recording access, dependencies, known limits and what to do when the normal route fails

Not included

  • Designing the flows and screens from scratch (the mobile app UX/UI package, done before the build)
  • Apple and Google developer accounts and their fees, registered in your name and paid by you
  • Hosting, back-end services and third-party subscriptions such as maps, payments or push providers
  • Further journeys, roles and integrations beyond the written estimate, quoted as a stage of their own
  • Texts, translations and the privacy policy or other legal documents the stores ask for

How the work runs

  1. 01

    You send the brief; within 1 working day a written estimate names the first journey, the platforms, the roles and the integrations.

  2. 02

    We lay out the architecture, from data and permissions to offline behaviour, and you approve it before code is written.

  3. 03

    We build from one codebase in stages, and each delivered stage has its own revision rounds.

  4. 04

    We run the journey on representative phones with a denied permission, an interruption and a weak network, then take the builds through store review.

  5. 05

    You receive the code, the release package and the completion note, so another developer can ship the next version.

Example

Pilot / new service — first client cases in progressHow pilots work

No mobile app case is published yet. The first client cases are in progress.

Related guides

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Websites and development

How much does a mobile app cost in 2026, and what makes the price move?

An agency-built mobile app usually costs tens of thousands of dollars: Velvetech’s 2026 guide puts simple apps at $40,000–$100,000 and complex ones at $200,000–$400,000…

Read the guide
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01 / Scope & estimate

Cross-platform mobile app development

How we work
Starting budgetFrom $213final estimate from the brief: user roles, integrations and platforms

Launch one dependable iOS and Android product around the customer journey that matters first.

Inside this scope
  • 1 priority customer journey, built first and working on both platforms before anything else is added
  • 1 mobile product architecture: data, permissions, offline states and the device features that journey needs
  • 1 shared codebase released as 2 apps, one for iOS and one for Android
  • 4 failure checks on representative phones: a denied permission, an interrupted session, a weak network and store review
  • 1 store release workflow with signed builds and a release package that can be rebuilt for every new version
  • 1 written completion note recording access, dependencies, known limits and what to do when the normal route fails
  • Timeline: 15–30 working days
  • Revisions: 2 rounds per delivered stage
  • Included: only the deliverables listed in the agreed package
  • Excluded: external costs and work outside the agreed scope
  • Input required: brief, current materials and any access needed for this scope
  • Handoff: listed deliverables plus a written completion note

A starting estimate for the selected scope. We confirm deliverables, timing and the final price in writing before work starts. External costs are separate.

What you can count on
  • Written estimate within 1 working day, sent to the contact you choose.
  • Scope in writing before work starts: deliverables, revision rounds and what is not included.
  • We work in four languages and show prices in your currency.
  • No account needed. Attachments are encrypted in this browser before upload.
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Development from $13

AI reduces repetitive production time. VITON13 passes that efficiency back to the client while human review remains part of every delivery.

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FAQ / Buyer questions

Questions people ask before buying

01Do we get one app or two?+

One codebase, released as two apps: one in the App Store, one in Google Play. Screens and logic are shared; the places where iOS and Android behave differently, such as permissions and back navigation, are handled the way each system expects.

02When is a progressive web app enough?+

When you already have a web app and your users mainly want it on the home screen and usable offline, with no store listing or deep device access. The PWA package adds that to the existing app without two store builds, and we say so when it fits.

03Who designs the screens?+

If you have approved designs, we build from them. If not, the mobile app UX/UI package comes first: flows, screens with their states and a component library, and the build starts from those files.

04Is publishing to the App Store and Google Play part of the work?+

Yes. The store release workflow is in scope: signed builds, the release package and the submission for review from your developer accounts. Apple and Google decide on approval and its timing, so the plan leaves room for a second submission.

05What moves the final estimate?+

Mostly user roles, integrations and platforms. Each of them is priced in the written estimate before work starts, and anything added later is agreed with you before it is built.

06How is the app tested before release?+

On representative phones as well as simulators. The priority journey is run with a permission denied, the app sent to the background mid-task, a weak connection and through store review; every failure found becomes a repeatable test.

07What does AI-assisted mean for an app?+

AI drafts screens, tests and routine code; a developer sets the architecture, reviews every change and prepares each release. On the human-led route a specialist writes the code and uses AI only as a helper.

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