Mobile App Development for iOS and Android

I deliver high-performance mobile apps for iOS and Android from a single codebase using React Native or Flutter, focused on activation, retention, and measurable business outcomes. Flat pricing: from $600 for a basic app, from $1,000 for an app with a backend.

Product Strategy

MVP-first scope, clear success criteria, and phased roadmap to reduce launch risk and shorten time-to-market.

Technical Scope

Authentication, API integration, payment flows, push notifications, analytics, and app store release workflows; sign-in and admin panels come with the backend package.

Architecture

Scalable codebase, reusable components, and maintainable release pipelines for long-term product growth.

Growth Focus

Decisions based on usage and conversion metrics, not vanity downloads.

Get a quote

Pricing

Basic mobile app

Apps that don't need a server side such as user accounts, a database, or an admin panel.

from $600

Mobile app with backend

More complex apps that need a server side (backend) such as user accounts, a database, or an admin panel.

from $1,000

Both packages ship for Android and iOS. Post-launch maintenance is not included and is billed separately.

Any feature not on the list is priced separately.

What fits the basic package

Apps that keep their data on the phone only, such as the Misbra prayer bead counter or the QuietPDF reader
Apps that pull data from an existing service, such as PaintDay, which shows painting hours from the weather forecast
Showcase and calculator apps that need no sign-in or admin panel

What needs the backend package

User accounts and sign-in
Apps where several people share the same data, such as Fairweek, a shared calendar for co-parents, or Turnabout, a school carpool rota
Apps whose content is updated from an admin panel

Process: From Idea to the Store

Intro call: We pin down what the app does, who uses it and whether it needs a server.
Fixed-price quote: The package and any extra features are agreed, so the price is clear from the start.
Screen flow: We map out the screens and the path a user takes through the app.
Build and test release: You install the app on your own phone through a Google Play test track on Android and TestFlight on iOS, and I fix what you report.
Store release: Screenshots, store description, privacy policy and store declarations are prepared and the app goes to review.
After launch: Bug tracking, new releases and improvements count as maintenance and are billed separately.

Which Technology?

The app's needs decide the stack. I have shipped live apps with all four:

Flutter

Builds iOS and Android from one codebase with the same interface on both. Examples: Fairweek, Hifzly, Tapin.

React Native

Shares code and know-how with projects that already have a JavaScript web panel. Examples: Vakithane, Medora.

Kotlin

For Android-only apps that need deep access to device features. Examples: QuietPDF, PaintDay, ShiftCal.

Capacitor

For bringing an existing web app to the stores. Example: Misbra.

Case Snapshots

ORP - Online Prescription Platform

Cross-platform digital health app for healthcare professionals, built with KVKK (Turkish data protection) compliance and live on both the App Store and Google Play from a single codebase.

App Store · Google Play

41 Published Products on Google Play

17 apps and 24 games released on Google Play stand as proof of end-to-end store publishing experience.

Records music practice time and shares it with the teacher.

Flutter · Google Play

Pupkin

Helps the whole family track a puppy's toilet training.

Flutter · Google Play

Tapin

Keeps a golf league's scores, handicaps and standings.

Flutter · Google Play

See all apps

What to Know Before Publishing

Developer accounts: A Google Play developer account is a one-time 25 USD fee and the Apple Developer Program is 99 USD per year. Both fees are paid directly to the stores.
Google Play closed testing: For newly created personal developer accounts, Google requires at least 12 testers to stay opted in to a closed test for 14 consecutive days before the app can go public; organization accounts are exempt. The schedule is planned around this from day one.
Privacy and declarations: Both stores ask for a privacy policy, a data usage declaration and an age rating before release; these are written to match the data the app actually collects.
Review: Both stores review the app before it goes live; a rejected submission is fixed and resubmitted.

Frequently Asked Questions

How much does a mobile app cost?

A basic app without a server side is from $600; a more complex app that needs a backend (user accounts, a database, or an admin panel) is from $1,000.

Are Android and iOS priced separately?

No. Both packages ship for both Android and iOS.

Can we start with MVP scope?

Yes, MVP-first planning is the default approach to reduce risk and validate quickly.

Will analytics be included?

Yes, event tracking and key product metrics are included to support data-driven iterations.

Do you handle app store process?

Yes, I support release prep, compliance checks, and store submission steps.

Is maintenance included?

No. Post-launch fixes, performance improvements, and new releases are not included and are billed separately.

Which accounts do I need to publish the app?

A Google Play developer account (one-time 25 USD fee) and an Apple Developer Program membership (99 USD per year). Both fees are paid directly to the stores.

Why can a Google Play launch take longer?

For newly created personal developer accounts, Google requires at least 12 testers to stay opted in to a closed test for 14 consecutive days before the app can go public. Organization accounts are exempt; the schedule is planned around this.

Which apps have you built?

17 of my apps and 24 of my games are live on Google Play; Vakithane and Medora are also on the App Store. The full list of apps is on this page.

Let's talk about your project

A short intro call is enough to align on scope and timeline; I usually reply the same day.

Get a quote msenginoglu@gmail.com