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Custom Mobile App Development Services for iOS and Android

InApps Technology provides custom mobile app development services for startups, scale‑ups and enterprises worldwide, with clients in 15+ countries across North America, Europe and Asia-Pacific: product discovery, UX/UI design, native (Swift, Kotlin) or cross‑platform (Flutter, React Native) builds, backend and APIs, QA, App Store and Google Play release, then ongoing support.

  • One dedicated team designs, builds, ships and runs your app
  • You own 100% of the code from day one
Book a 30-minute scoping call

You get a written scope, team plan and cost range within 48 hours of the call.

Mobile app clients and recognition

App teams that build with InApps Technology

Recognised by

Clutch 4.9/5 39 verified reviews (opens in a new tab)
  • Clutch Top Software Developers, Enterprise, Vietnam
  • Clutch Top Artificial Intelligence Company, Vietnam, 2025
  • Sao Khuê Award 2025, VINASA

Why Most App Projects Stall Before Launch

Most app projects fail on team setup, not on code. The build stalls because nobody owns it end to end, the vendor disappears after launch, or hiring takes longer than the market window.

One of our clients, a New Zealand subscription app with 6,000+ users, came to us after its previous vendor left no handover notes and live crashes. Fixing that cost more than building it right the first time.

Three patterns show up again and again:

01

Local hiring is slow and expensive in every major market. An app needs at least iOS, Android and backend skills, so you hire three people, not one. Base salary is only the start: employer taxes, benefits, recruiting fees and the months a role sits open come on top.

02

Freelancers and project shops leave gaps. Code arrives without documentation, store accounts sit in someone else's name, and no one is around for version 1.1.

03

Quotes hide the real cost. Agency estimates for a mid-complexity app range from $50,000 to $150,000 (Tvisha (opens in a new tab)), and maintenance adds 15-20% of the build cost every year. A low first quote often means rework later.

Average base salary for one in-house mobile developer, by market:

≈ US$ per month

MarketApprox. US$ per monthAverage base salary
United StatesUS$11,370US$136,469 a year
CanadaUS$6,550C$110,254 a year
AustraliaUS$6,410A$109,255 a year
NetherlandsUS$5,190€4,658 a month
SingaporeUS$4,760S$6,103 a month
United KingdomUS$4,680£42,204 a year
GermanyUS$4,280€46,022 a year

Source: Indeed salary data for "mobile developer" in each country, updated October 2026 (US (opens in a new tab), UK (opens in a new tab), DE (opens in a new tab), NL (opens in a new tab), CA (opens in a new tab), AU (opens in a new tab), SG (opens in a new tab)). Base pay only, before employer costs. US$ per month converted from each local figure at 29 October 2026 exchange rates, rounded.

What Our Mobile App Development Services Include

InApps Technology builds and runs your mobile app with one dedicated team that owns the product from discovery to post-launch: the same engineers design, build, test, release and maintain it. You talk to those engineers directly, in your Slack and your standups.

  1. 1. Discovery and product strategy (1-3 weeks)

    • User flows, feature list and MVP scope, ranked by business value
    • Platform decision: native, Flutter or React Native (see the table below)
    • Architecture plan, third-party integrations and a written cost and timeline estimate

  2. 2. UX/UI design

    • Wireframes and clickable prototypes in Figma, reviewed with you before the build starts
    • Design system that follows Apple Human Interface Guidelines and Material Design
    • Accessibility checks before a line of code is written

    See our UI/UX design services for the full design scope.

  3. 3. App development: native and cross-platform

    • Native iOS and Android apps
    • Cross-platform apps from one codebase for both stores
    • Backend, APIs, admin panels and cloud setup
    • Features clients ask for most: payments and subscriptions, chat, maps, push notifications, offline mode, analytics and AI features

    The full tool list is in our mobile app tech stack below.

  4. 4. QA and release

    • Manual and automated testing on real iOS and Android devices
    • Performance, security and regression testing before every release
    • App Store and Google Play submission, registered under your company accounts

    Testing runs through our QA and testing services.

  5. 5. Support, maintenance and growth

    • OS and SDK updates, crash monitoring and bug fixes under an agreed response time
    • Feature releases on a fixed rhythm, driven by your analytics
    • Code audit and takeover of apps built by another vendor

    Ongoing work runs under our software maintenance and support model.

Built for the markets you launch in

A global app has to fit each market's language, payments and privacy rules, so InApps Technology plans these in discovery, not after launch.

  • Localization:

    multi-language content, local date, currency and number formats, right-to-left layouts where needed

  • Payments:

    Apple In-App Purchase, Google Play Billing, Stripe, Apple Pay and Google Pay, plus regional gateways your market requires

  • Privacy and data residency:

    data handling mapped to the laws you sell under, such as GDPR in the EU, UK GDPR, the Australian Privacy Act, Singapore's PDPA and the CCPA in California, with cloud regions chosen to match

  • Store readiness:

    App Store and Google Play privacy labels, age ratings and regional availability set per country

Apps We Have Built and Run

Every project below is an InApps Technology client in a different market (the US, New Zealand and Singapore), with results from our project records and verified Clutch reviews.

BidBid welcome and splash screens

BidBid (Austin, Texas): from idea to both app stores in 9 months

Problem:
A founder with an auction-based social app idea, a fixed nine-month window and a 12-hour time difference to the build team.
What we did:
Fixed the MVP spec early, designed in Figma, then built sign-in, matching, live auctions, video meet-ups, payments and chat in React Native on Node.js and Google Cloud.
Outcome:
Working MVP on schedule and within estimate, live on the App Store and Google Play in December 2021.

"We were impressed by their willingness to overcome cultural challenges and deliver a product beyond our expectations."

Doug Guller, Founder & CEO, BidBid (verified Clutch review)
Read the BidBid case study
Two Raw Sisters recipe app sign-up and home screens

Two Raw Sisters (New Zealand): a broken app made stable, then grown

Problem:
A subscription recipe app with 6,000+ subscribers, frequent crashes and no documentation from the previous vendor.
What we did:
A dedicated five-person team audited and documented the code, fixed critical bugs first, resynced the data layer, then added search, analytics and a web version.
Outcome:
25+ App Store releases since August 2025, none late. 4.9 rating on the App Store.

"Project management has been an 11/10. Always respond to my needs and questions in detail and deliveries have always been on time."

Margo Flanagan, Director, Two Raw Sisters (verified Clutch review)
View on the App Store (opens in a new tab) Read the Two Raw Sisters case study
Qualee web dashboard and mobile app screens

Qualee (Singapore): a 22-person team for web, iOS and Android

Problem:
An HR tech platform whose roadmap outgrew its development capacity.
What we did:
Scaled a 22-member team with iOS, Android, backend and QA engineers on a tight timeline, shipping all three platforms on one release rhythm.
Outcome:
18 months of continuous releases, better stability on every platform, and a documented handover to Qualee's own team.
Read the Qualee case study

Mobile App Development Tech Stack

InApps Technology builds mobile apps on a proven stack: Swift and Kotlin for native apps, Flutter and React Native for cross-platform apps, and Node.js, Python, Go, Java or Laravel on AWS, Google Cloud or Azure for the backend. We pick each tool for your product and your team's skills, and explain the choice in writing during discovery.

Native iOS and Android

Apps that need full device access, peak performance or work on an existing native codebase. Qualee's iOS and Android apps run on Swift and Java.

  • Swift
  • Kotlin
  • Java

Already have a stack? Your dedicated team works inside the tools, repositories and pipelines you run today.

Native or cross‑platform: which build fits your app?

We recommend the stack in discovery, in writing, with the trade‑offs. You make the call.

If your app needs...ChooseWhy
One codebase, fast launch on both stores, standard UIFlutter or React NativeOne team ships iOS and Android together, lower build and maintenance cost
A team that already writes React for webReact NativeShares skills and some logic with your web app
Heavy device features: camera, AR, Bluetooth, background processingNative (Swift + Kotlin)Full access to platform APIs and the best performance
An existing native app that needs new featuresNativeExtends what you have without a rewrite

InApps Technology vs. In-House Hiring vs. Freelancers

The right choice depends on who owns the app after launch. In-house suits long-term ownership if you can wait to hire. Freelancers suit small, fixed tasks. A dedicated team suits a product that must ship fast and keep improving.

Decision criterionIn-house hiringInApps dedicated mobile teamFreelancers / project-only agency
Time to first codeMonths of recruiting per role4-6 weeks with a complete teamFast for one person, slow to assemble a full team
Cost structureSalary, benefits, recruiting fees, equipmentTransparent monthly team cost or scoped fixed priceHourly or fixed bid, change requests billed extra
Skill coverageLimited to who you can hireiOS, Android, backend, QA and design in one teamPatchy, one skill per contractor
Code and IPYours100% yours from day one, store accounts in your nameOften unclear, accounts in the vendor's name
SecurityYour policiesISO 27001:2022 certified processesVaries by person
After launchTeam staysSame team maintains and grows the appContract ends at delivery

For a line-by-line budget breakdown, read our guide to custom software development cost.

Engagement Models and Pricing

InApps Technology prices custom mobile app development services in three ways, matched to how sure you are of the scope. Every model starts with a scoping call and a written estimate. No commitment before you see the numbers.

Fixed-scope build

Best for
A first app or MVP with a clear feature list
How you pay
Fixed price per milestone, projects from US$10,000
Typical team
3-5 people: product designer, 1-2 mobile engineers, backend engineer, QA

Most first apps start as a fixed-scope MVP and move to a dedicated team after launch. Building an MVP first? See our MVP development services.

Frequently Asked Questions

You get a written scope, team plan and cost range within 48 hours of the call.

Book a scoping call
Mobile app development services at InApps Technology cover discovery, UX/UI design, iOS and Android development, backend and APIs, QA, app store release and post-launch support. One dedicated team handles every stage, so nothing gets lost between vendors. You can also hire us for a single stage, such as design or a code audit.
Custom mobile app development usually costs US$15,000 to $50,000 for a simple single-platform app, $50,000 to $150,000 for a mid-complexity app and $150,000+ for complex apps, based on agency benchmarks (Netguru (opens in a new tab), Tvisha (opens in a new tab)). InApps Technology projects start at US$10,000. Your exact price depends on features, platforms and design depth, and you get it in writing after a scoping call.
A custom mobile app MVP usually takes 3-6 months, a mid-complexity app 4-7 months and a complex app 7-12 months, based on agency benchmarks (Designveloper (opens in a new tab)). Homerun went from first design to launch in six months with a team of three. Your dedicated team starts shipping code 4-6 weeks after you sign.
Choose cross-platform (Flutter or React Native) when you need both stores fast on one budget, and native (Swift and Kotlin) when the app depends on heavy device features or peak performance. Most business, marketplace and subscription apps work well cross-platform. InApps Technology recommends the stack in writing during discovery.
You own 100% of the source code and intellectual property from day one under every InApps Technology contract. We publish apps under your Apple Developer and Google Play accounts, and the code lives in your repository. InApps runs ISO 27001:2022 certified security processes and signs an NDA before scoping.
Vietnam gives you senior mobile engineers who stay on your product for years, at a total cost below hiring in North America, Western Europe, Australia or Singapore. InApps Technology has built apps from Ho Chi Minh City since 2016 for clients in 15+ countries. English is a hiring requirement for every engineer, and you talk to them directly.
An InApps Technology team in Ho Chi Minh City (GMT+7) shares most of the working day with Singapore and Australia, overlaps European mornings and joins US calls early in the US morning. Each team agrees fixed overlap hours for standups, reviews and urgent fixes with you at kickoff. BidBid in Austin, Texas shipped its MVP on schedule across a 12-hour time difference.
InApps Technology keeps the same team on your app after launch to handle OS updates, crash fixes and new features on a monthly support plan. You never have to re-explain the product to a new vendor. That continuity is why 85%+ of our clients stay with us for multiple years.
Let’s build

Ready to add senior engineers to your roadmap?

Book a 30-minute call. We will map the roles, the timeline and a cost range - and tell you plainly if we are not the right fit.

4.9 / 5 from 39 verified reviews on Clutch
No sales deck No discovery invoice Written role map within five days

Send us a project brief

The more of the shape you give us, the more useful the first reply is. If the answer is that you should hire locally, or that another firm fits better, we will say that instead.

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