HarmonyOS App Development
A HarmonyOS Development Company For Teams Selling On Huawei
Most products do not need HarmonyOS. Yours does if you sell in mainland China, if Huawei devices show up in your own analytics, or if your Android build no longer runs on the phones your customers just bought. If that is you, the app has to be written natively.
Triple Protection Guarantee
- US-Registered Entity
- Signed IP Assignment
- Senior Engineers Only
Triple Protection Guarantee:
- US-Registered Entity
- Signed IP Assignment
- Senior Engineers Only
Years In Business
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Engineers On Staff
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Avg. Engineer Exp.
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Who Really Needs It
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No Google Play
AppGallery
Senior Engineers
Vetted Only
Timezone Overlap
Live Hours
ArkTS Native
Not A Wrapper
Delaware LLC
US Entity
HMS Core Kits
Not GMS APIs
Honest Scoping
Every Merge
AppGallery Release
Submitted
China Hosting
If Needed
IP Assignment
Signed
Delivery Overlap
Fixed
Hours
Code & App Owner
You
Trusted By Startups
What A HarmonyOS Development Company Does
A HarmonyOS development company is worth paying for one reason: the platform is different from Android, and pretending otherwise wastes your budget. HarmonyOS NEXT does not run Android apps, so an APK is not a starting point. The app is written in ArkTS against ArkUI, built in DevEco Studio, wired to HMS Core rather than Google services, and published through AppGallery. We do that work, and we say so plainly when you do not need it.
Stallyons is registered in Delaware as a US company, and our engineers work a time-zone window agreed before the project starts, with four-plus hours of daily overlap. You sign a US contract, run diligence on a US entity and pay one US invoice. Behind the work sits twelve-plus years of delivery across six continents and around thirty-five engineers, averaging four-plus years of production experience. Companies come to us once Huawei hardware is a real part of their market and an Android build alone no longer reaches it.
What A HarmonyOS Build Covers
An honest scoping call first: where your users are, which devices they carry, and whether AppGallery reach justifies a second native codebase. Plenty of products get told no, and that is a valid outcome.
Native ArkTS and ArkUI rather than a wrapper: declarative interface, the platform's own state model and navigation, built in DevEco Studio so the app behaves like it belongs on the device.
HMS Core in place of Google services: Push Kit, Map Kit, Account Kit, in-app purchases, location and analytics wired in, because the Google equivalents are not present on these devices.
AppGallery treated as a release channel: developer account, listing, category requirements, staged availability by region and the update path after launch all planned in.
Quality you can inspect: code review on every merge, tests, an agreed definition of done, and work tracked on your own board where you can read it without asking.
One accountable vendor: one contract, one invoice and one entity for legal and finance to run diligence on, instead of a spread of contractors across four jurisdictions.
Who Actually Needs HarmonyOS App Development Services
- Start with your analytics, not with a trend. If Huawei devices are not in your user base and China is not a market, HarmonyOS is a cost with no audience behind it.
- Ask whether HarmonyOS NEXT is in scope. The older line ran Android apps; the current one does not, and that single fact decides whether you need a second codebase.
- Ask which HMS Core kits the app will depend on. Push, maps, sign-in and payments all have Huawei equivalents, and each one is real work.
- Ask about the AppGallery account and the review requirements for your category. Some categories need documentation that takes longer to gather than the build itself takes to write.
- Check where the data will live. Selling into mainland China raises hosting and compliance questions that belong in scoping, not in the week before launch.
- Ask what happens to your Android app. Keeping both is normal, and the two share design and backend work but not the client code, so budget for both.
How A HarmonyOS Project Starts Here
Every project starts with a free 45-minute scoping session. No slide deck, no sales script. You bring the markets, the audience and the devices they carry; you leave with a straight answer and a plan.
We are selective about new projects and cap how many we run at once, because the scoping is the product. If HarmonyOS would not reach enough of your users to pay for itself, we will say so.
Why Clients Choose Us
Full
Written IP Transfer
USA
Contract Entity
Yours
AppGallery Listing
Named
Delivery Lead
REAL markup below, paste verbatim:
Ready to find out whether HarmonyOS is worth it?
What We Build For HarmonyOS
The HarmonyOS App Development We Deliver
Every product is different and the underlying jobs repeat: decide whether it is worth building, write it natively in ArkTS, replace the Google pieces, connect it and get it into AppGallery. These are the builds we deliver.
Native HarmonyOS Apps
ArkTS, ArkUI, DevEco Studio builds
End-to-End
HarmonyOS NEXT
Pure Harmony, no Android layer
Rebuilt Clean
HMS Core Wiring
Push, Map, Account, IAP, Analytics
Wired In
AppGallery Publishing
Account, listing, review, regions
Live In Production
Offline Mode
Local store, sync, conflicts
No Signal OK
In-App Purchasing
Huawei IAP, subs, entitlements
Charged
APIs And Integrations
REST, GraphQL, third-party SDKs
Linked
Device Test Coverage
Huawei handsets, tablets, emulator runs
Sign-Off
Android Side By Side
Shared design, separate clients
Future-Proof
Support & Releases
Monitoring, fixes, store updates
Kept Running
Not sure HarmonyOS is worth it? Let us check together.
Common Challenges
Why Do HarmonyOS Projects Go Wrong?
Six patterns behind almost every HarmonyOS project that stalls. Most start with a wrong assumption about the platform.
APK Assumption
01
The plan is to submit the existing Android build. HarmonyOS NEXT does not run Android apps, so the work is a native rewrite of the client, and discovering that after the budget is set costs a quarter.
Google Services Gap
02
Sign-in, maps, push and analytics all come from Google in the Android build. None of them are present here, and each one needs a Huawei equivalent wired in.
Built For No Audience
03
The app is built because a competitor announced one. Nobody checked whether Huawei devices appear in the analytics, and the launch reaches almost no one.
AppGallery Delays
04
The developer account, the business documents and the category requirements are left until the build is finished. Approval then waits on paperwork rather than on engineering.
A Web Wrapper Shipped
05
A web view is packaged as a HarmonyOS app to save time. It ignores the platform's own navigation and controls, so it feels foreign on the device and the reviews say so.
Data Rules Found Late
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06
Selling into mainland China raises hosting and data questions. Answered during scoping they are a design choice; answered at launch they are a delay.
Recognise a few of these? Let us do it properly.
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Our HarmonyOS Work
6 HarmonyOS App Development Services
Six ways to buy HarmonyOS delivery from one accountable vendor. Run one, or run several in parallel under a single contract.
HarmonyOS Feasibility Check
01
Before anything is built: who your Huawei users are, which HMS kits the app would need, what AppGallery approval involves, and whether the reach justifies a second codebase.
Native ArkTS Builds
02
The app written properly in ArkTS against ArkUI, built in DevEco Studio, using the platform's own navigation, layout and state model rather than a wrapper around a website.
HMS Core Integrations
03
Push, maps, sign-in, payments, location and analytics wired to Huawei's own kits, with the Google dependencies from your Android build mapped across.
Huawei Device QA Passes
04
Testing on real Huawei hardware as well as the emulator, with regression before every submission and a written sign-off you can hold us to.
Backends & Integrations
05
The services behind the app, built by our own API development practice: REST or GraphQL endpoints, authentication, push and sync.
AppGallery Release & Support
06
Developer account, listing, category requirements, regional availability, and the monitoring and update work that keeps the app healthy after it goes live.
Not sure which piece you need first? Let us scope it together.
Why Choose Us
What Makes Our HarmonyOS App Development Different
The details that decide whether a HarmonyOS build reaches an audience worth having.
A US Legal Entity
01
Stallyons is registered in Delaware. Your contract, your invoice and your legal recourse sit with a US company, not an unknown one.
We Will Tell You No
02
If your analytics do not show Huawei devices, we will say so during scoping rather than sell you a codebase nobody will open.
Overlap You Set
03
You choose the hours we share with your working day, and stand-ups, reviews and escalations all happen inside that window.
Native, Not Wrapped
04
Apps are written in ArkTS against ArkUI, so navigation, layout and gestures follow the platform instead of fighting it inside a web view.
Reviewed Code
05
Every merge is reviewed against an agreed definition of done, on your board, where you can read it yourself.
One Contract
06
One contract covers the engagement, so procurement, legal and finance each deal with a single named counterparty.
Ready to see whether HarmonyOS is right for you?
Our Process
From First Call To HarmonyOS Launch In Six Steps
A build process that answers whether you need HarmonyOS before it builds anything.
Discovery
Understand the markets, users and devices
Scoping
Agree the HMS kits, scope and costs
Design
ArkUI flows, states and platform patterns
Contracting
NDA, IP assignment, access and onboarding
Deliver
Built in ArkTS, reviewed on merge
Release & Tune
AppGallery release, then read the data
Want to see how this maps to your roadmap?
Technology Stack
What Our HarmonyOS Developers Work With
The language, kits and services a HarmonyOS product is actually built on, and the tooling that ships it.
Language & UI
ArkTS Language
ArkUI Layout
State & Bindings
ArkCompiler
DevEco IDE
HMS Core Service Kits
Push Alerts
Map & Location
Account Kit
IAP Kit
Analytics & Scan
Huawei Devices
Phones & Tablets
Foldable Modes
Wearables & Bands
Smart Screen
In-Car & IoT Surfaces
Store & Release
AppGallery Ops
Huawei IAP
HAP Packages
Signing & Profiles
Regional Rollout
Backend & CI
Node.js Services
TypeScript 5
PostgreSQL Data
GitHub Actions / CI
Datadog Monitoring
Who We Build This For
HarmonyOS App Development For Businesses Selling On Huawei
Eight kinds of business where Huawei hardware is part of the market your product sells into, not a line on a roadmap.
Retail & Commerce
Catalogue, checkout, loyalty
Fintech & Mobile Money
Wallets, KYC checks, payments
Travel & Transport
Booking, tickets, itineraries
EdTech & Learning
Courses, offline lessons, tests
Logistics & Field Work
Routing, scanning, proof of job
Health & Public Services
Appointments, records, alerts
Manufacturing & IoT
Rugged devices, telemetry, MDM
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Capability Web Wrapper Vendor In-House Android Team Freelance Developer Stallyons
Technologies Told whether you need it at all ✕ Always yes No market view ✕ Never asked Checked before you buy Native ArkTS and ArkUI build ✕ Web view only Learning as they go Varies by developer Written to the platform HMS Core in place of Google services ✕ Not handled Mapped late Push only Mapped kit by kit AppGallery account and review Your problem Started late Sometimes included Opened at project start Testing on real Huawei hardware ✕ Browser testing Emulator only One device Devices plus emulator Android app kept in step ✕ Separate product Same team ✕ Out of scope Shared design and backend Developer account and listing owner Varies Your own account ✕ Held by the developer Yours from day one
| Capability | Web Wrapper Vendor | In-House Android Team | Freelance Developer | Stallyons Technologies |
|---|---|---|---|---|
| Told whether you need it at all | ✕ Always yes | No market view | ✕ Never asked | Checked before you buy |
| Native ArkTS and ArkUI build | ✕ Web view only | Learning as they go | Varies by developer | Written to the platform |
| HMS Core in place of Google services | ✕ Not handled | Mapped late | Push only | Mapped kit by kit |
| AppGallery account and review | Your problem | Started late | Sometimes included | Opened at project start |
| Testing on real Huawei hardware | ✕ Browser testing | Emulator only | One device | Devices plus emulator |
| Android app kept in step | ✕ Separate product | Same team | ✕ Out of scope | Shared design and backend |
| Developer account and listing owner | Varies | Your own account | ✕ Held by the developer | Yours from day one |
Media & Entertainment
Streaming, downloads, casting
Working in another sector? See all industries we serve.
How We Compare
Your HarmonyOS Development Options, Compared
An honest look at your four delivery options.
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See the difference for yourself
Complete Engagement
Everything Included In Your HarmonyOS App Build
From Scoping to Contracting to Delivery, One Vendor
Here is everything included when you build your HarmonyOS app with us:
One HarmonyOS Build Price: No Hidden Fees, No Surprises.
Every HarmonyOS engagement includes all eight components above. One contract, one senior team, one predictable cost, and no vendor sprawl.
🔒 No obligation. We'll deliver a detailed proposal within 48 hours.
Plus, Get These Free Bonuses
Free HarmonyOS Check
A written read on whether HarmonyOS reaches your users, which HMS kits you would need, and what AppGallery approval involves. Yours to keep.
Included Free
Build Plan And Estimate
A phased build plan with scope, milestones, the integrations it needs and a transparent, itemised estimate for the engagement.
Included Free
Free Vendor Checklist
The questions we would ask any HarmonyOS development company about ArkTS, HMS kits, AppGallery and data rules, so you can test us too.
Included Free
Risk-Free Partnership
Our HarmonyOS Delivery Promise
We stand behind every engagement with commitments that protect your investment.
01
Scope Agreed First
Scope, model, working hours and cost structure are written down and agreed before contracting, so nothing is discovered later.
02
Built to Last
Senior developers, code review, automated tests, security and accessibility audits, and clean, documented code you fully own.
03
IP And Access Protected
NDA and IP assignment are signed before access, permissions are scoped per person, and your accounts stay under your control.
Start your HarmonyOS build with confidence, backed by our Triple Protection Guarantee.
Track Record
Engagements That Ship, Scale, and Compound
500+
Projects Delivered
29+
Service Categories
81%
Repeat Client Rate
4.9 ★
Clutch Rating
"Stallyons took our Figma design and built it into a live web application, a cognitive game with level-based match play, messaging, a tutorial, and a directory that ranks users nationally. What impressed me most was their grasp of the code behind that logic, and the quality of the experience. Delivered on time with steady updates."
Jerry L.
Founder
PicCiti LLC
"We brought Stallyons in to absorb an overflow of work, and they delivered ten iOS and Android apps, from reporting to geo-location for logistics, plus several backend systems, owning design, development, and app-store submission. Everything stood out: code quality, speed, and reliability. Perfect code, on time, adopted company-wide."
William B.
Director
Amplo Solutions
FAQ
Frequently Asked HarmonyOS Development Questions
HarmonyOS app development means building natively for Huawei’s own operating system rather than shipping an Android build to it. The app is written in ArkTS against the ArkUI framework, compiled in DevEco Studio, wired to HMS Core kits in place of Google services, and published through AppGallery. It matters for products whose users are on Huawei hardware, and for very few others.
No. The earlier HarmonyOS line kept Android app compatibility, so an APK would install and run. HarmonyOS NEXT drops that layer, and only native HarmonyOS apps run on it. If Huawei devices matter to your business, that means a second client codebase alongside your Android one, sharing design, product decisions and backend but not the app code. If they do not matter, it means nothing at all, and scoping tells you which of the two you are.
Cost follows how many screens the app has, how many HMS Core kits replace Google dependencies, whether data has to sit in a particular region, and how much of your existing design and backend can be reused, so a figure before scoping is guesswork. We scope first, then price, and itemise every phase so you can cut before you commit.
Usually not, and we would rather say so. It is worth building when you sell in mainland China, when Huawei devices show up meaningfully in your own analytics, or when a distribution partner requires an AppGallery listing. If none of those is true, the honest answer is that a HarmonyOS build reaches almost nobody and the budget belongs elsewhere.
You do, from the first day. The Huawei developer account, the AppGallery listing, the signing material and the repositories are registered in your name, and NDA and IP assignment are signed before anyone gets access. Everything written on the engagement is assigned to you outright, with no licence-back.
Kit by kit, mapped from your Android build. Firebase messaging becomes Push Kit, Google Maps becomes Map Kit, Google Sign-In becomes Account Kit, Play Billing becomes Huawei IAP, and analytics moves across too. Each swap is real work with its own behaviour, so we list them during scoping rather than assuming parity.
Through a Huawei developer account in your name, with business documents verified before anything is submitted. The app is packaged, signed, listed with the assets each category requires, and released to the regions you choose. Some categories ask for extra documentation, so we open the account early rather than at the end.
Often yes, and sequenced rather than simultaneous. Design, product decisions and backend are shared, so the second build costs less than the first, but the client code is separate and needs its own testing and release. Most teams ship Android first, which is covered on our Android app development page.
Still have questions? Let's talk.
Schedule an appointment with us today!
Ready To Find Out If HarmonyOS Is Worth It?
Get a free consultation. We will look at where your users actually are, then tell you plainly whether to build.
