Native Android App Development
An Android App Development Company That Tests On Real Phones
Android is not one device. It is thousands of them, across a dozen manufacturers, on OS versions that stretch back years. We build in Kotlin, test on the handsets your users actually hold, and treat Play policy and the release track as part of the engineering.
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
0
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Avg. Engineer Exp.
0
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Where Android Slips
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Device Matrix
Not Guessed
Senior Engineers
Vetted Only
Timezone Overlap
Live Hours
Play Policies
Cleared First
Delaware LLC
US Entity
Battery Rules
Doze Tested
Crash Rate Budget
Every Merge
Release Track Plan
Rolled Out
Store Listing
Compliant
IP Assignment
Signed
Delivery Overlap
Fixed
Hours
App & Play Owner
You
Trusted By Startups
What Our Android App Development Company Does
An Android app development company earns its fee in the places the platform is unforgiving. Fragmentation across screen sizes, chipsets and manufacturer skins. Background work that Doze, App Standby and an OEM battery manager will quietly kill. A Play Console review that reads your data safety form as a promise. We write in Kotlin with Jetpack Compose, and we treat the store listing and the release track as engineering rather than an afterthought.
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. Product teams come to us when an Android build has to survive real hardware rather than one clean emulator.
What An Android Build Covers
A device matrix agreed before code: the manufacturers, screen sizes, API levels and chipsets your own analytics say your users are on, so testing targets reality rather than whichever handset the developer happens to own.
Kotlin and Jetpack Compose as the default: one modern UI layer, coroutines for concurrency, and a codebase the next engineer can read without inheriting five years of View system archaeology.
Background work that survives the operating system: Doze, App Standby, foreground service types and OEM battery managers all tested, so sync, alarms and location keep running on a real phone.
Play Console handled as engineering: the data safety form, target API level deadlines, signing keys, staged rollouts and a policy read before submission rather than after rejection.
Quality you can inspect: code review on every merge, unit and instrumented tests, crash and ANR budgets watched after release, and work tracked on your own board.
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.
Why Buyers Screen An Android App Development Agency Hard
- Ask which devices they will test on. A current flagship and an emulator is not a device matrix, and the manufacturer that eats your background work is not on that list.
- Ask what happens at the next target API level deadline. Play sets one every year, and an app that misses it stops being available to new users on newer phones.
- Ask who completes the data safety form. It is a declaration about your app, and a wrong answer there is a policy problem rather than a paperwork one.
- Ask how they handle manufacturer battery restrictions. Samsung, Xiaomi and others layer their own power management over Doze, and a sync that works on a Pixel can die silently elsewhere.
- Check the exit before you need it. The Play Console account, the signing key and the repositories all sit in your own name, so changing supplier is administration.
- Ask for the release plan. Staged rollout percentages, a halt threshold on crash rate, and a rollback route all agreed before the first production push.
How An Android Project Starts With Us
Every project starts with a free 45-minute scoping session. No slide deck, no sales script. You bring the product, the audience and the devices they carry; you leave with a build plan and a timeline.
We are selective about new projects and cap how many we run at once, because the scoping is the product. If Android is not where your audience actually is, we will say so before you buy it.
Why Clients Choose Us
Full
Written IP Transfer
USA
Contract Entity
Yours
Keystore & Console
Named
Delivery Lead
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Ready to build an Android app that behaves everywhere?
What We Build For Android
The Android App Development We Deliver
Every product is different and the underlying jobs repeat: design it, build it in Kotlin, make it survive real hardware, connect it and get it through review. These are the Android builds we deliver most often.
Native Android Apps
Kotlin, Jetpack Compose, Material 3
End-to-End
Tablet & Foldable
Large screens, resizable layouts
Adaptive UIs
Wear OS & Watch
Tiles, complications, health data
On Wrist
Android TV And Auto
Leanback, media, driver-safe UI
Live In Production
Offline Mode
Room, WorkManager, conflict sync
No Signal OK
In-App Purchasing
Play Billing, subs, entitlements
Charged
APIs And Integrations
REST, GraphQL, third-party SDKs
Linked
Device Test Coverage
Espresso, Robolectric, real device farm
Sign-Off
Java To Kotlin Moves
Rewrites, migrations, Compose
Future-Proof
Support & Releases
Monitoring, fixes, store updates
Kept Running
Not sure which Android surfaces you need? Let us map it.
Common Challenges
Why Do Android App Builds Break?
Six patterns behind almost every Android app that has to be rebuilt. All six start on a developer's own handset.
One Device Tested
01
The app is built and demoed on one recent flagship. It reaches users on three-year-old mid-range hardware with less memory, a slower chip and a manufacturer skin that manages background work its own way.
Background Work Dies
02
Sync, alarms and location work perfectly in testing, then stop on real phones because Doze, App Standby or an OEM battery manager suspended them without warning.
Target API Deadline
03
Play raises the required target API level every year. An app that misses the deadline stops reaching new users, and the fix is rarely a one-line change.
Data Safety Guess
04
The data safety form is filled in from memory rather than from the SDKs the app actually ships. The declaration and the behaviour disagree, and the review team is the one who notices.
Released To All At Once
05
A build goes to every user on day one. A crash that only affects one chipset becomes a store rating problem before anybody has finished reading the first report.
Keystore Held By Vendor
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06
The signing key sits in an agency account. Changing supplier becomes a negotiation, because without that key nobody can publish an update to your own app.
Recognise a few of these? Let us do it properly.
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Our Android Services
6 Android App Development Services
Six ways to buy Android delivery from one accountable vendor. Run one, or run several in parallel under a single contract.
Custom Android App Builds
01
End-to-end delivery of a defined Android product: scope, design, build in Kotlin, test across an agreed device matrix and release, with a named lead who reports into you.
Android App Design
02
Material 3 interfaces designed for the screen sizes and input methods your users have, prototyped in Figma and handed over as Compose components rather than flat images.
Java To Kotlin Migration
03
Legacy Java and View-based screens moved to Kotlin and Compose in stages, with the old screens running until the new ones have earned the switch.
Device Farm & QA Testing
04
Testing capacity that runs on your release cycle: unit and instrumented suites, a real device farm, regression before every deploy and a written sign-off.
Backends & Integrations
05
The services behind the app, built by our own API development practice: REST or GraphQL endpoints, authentication, push messaging and offline sync.
Play Store Release & Support
06
Store listing, signing, staged rollouts, crash and ANR monitoring after launch, and the target API level work that keeps the app available every year.
Not sure which piece you need first? Let us scope it together.
Why Choose Us
What Makes Our Android App Development Different
The details that decide whether an Android app still works on the phones people actually own.
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.
Real Device Matrix
02
We agree the manufacturers, API levels and screen sizes up front from your own analytics, then test on those rather than on one clean emulator.
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.
Play Policy First
04
Data safety, permissions, target API levels and billing rules are read before submission, so review is a formality rather than a delay.
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 what a proper Android build looks like?
Our Process
From First Call To Android Launch In Six Steps
A build process that settles devices, permissions and release policy before any screens.
Discovery
Understand the users, devices and product goals
Scoping
Agree the device matrix, scope and cost
Design
Material 3 flows, states and Compose components
Contracting
NDA, IP assignment, access and onboarding
Deliver
Built in Kotlin, reviewed on merge
Release & Tune
Staged rollout, then read crashes and ANRs
Want to see how this maps to your roadmap?
Technology Stack
What Our Android App Developers Work With
The languages, libraries and services we build Android products on, and the tooling that ships them.
Language & UI
Kotlin Coroutines
Compose UI Kit
Material Design 3
Java Legacy
XML Views
Data & Background Work
Room Storage
WorkManager Jobs
Offline Sync
Hilt DI
Retrofit & OkHttp
Device Surfaces
Phones & Tablets
Foldable Modes
Wear OS & Watches
Android TV UI
Android Auto & Cars
Store & Billing
Play Console
Play Billing
App Bundles
Play Integrity API
Firebase Suite
Build & Deliver
Gradle Build Tools
Espresso QA
Crashlytics & ANR
GitHub Actions / CD
Datadog Monitoring
Who We Build This For
Android App Development For Every Kind Of Product
Eight kinds of product with different users and one shared need: an app that behaves on the handset in their pocket.
Retail & Commerce
Catalogue, checkout, loyalty
Fintech & Mobile Money
Wallets, KYC checks, device binding
Health & Wellness
Tracking, wearables, records
EdTech & Learning
Courses, offline lessons, tests
Logistics & Field Work
Routing, scanning, proof of job
Food & On-Demand Apps
Orders, tracking, driver app
Manufacturing & IoT
Rugged devices, telemetry, MDM
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Capability App Template Shop In-House Generalist Freelance Android Dev Stallyons
Technologies Device and OS coverage ✕ One reference phone Whatever the team owns Emulators mostly Matrix from your analytics Background work on OEM skins ✕ Not considered Found after launch Doze only Tested per manufacturer Play policy and target API level Your problem Learned on the job Sometimes included Read before submission Release control and rollback ✕ Single push Ad hoc ✕ No halt threshold Staged tracks with a halt rule Kotlin and Compose codebase ✕ Template output Mixed with old Views Varies by developer Reviewed, tested, documented Backend and integrations ✕ Out of scope Separate team Simple endpoints Built alongside the app Signing key and console ownership Varies Your own accounts ✕ Held by the developer Yours from day one
| Capability | App Template Shop | In-House Generalist | Freelance Android Dev | Stallyons Technologies |
|---|---|---|---|---|
| Device and OS coverage | ✕ One reference phone | Whatever the team owns | Emulators mostly | Matrix from your analytics |
| Background work on OEM skins | ✕ Not considered | Found after launch | Doze only | Tested per manufacturer |
| Play policy and target API level | Your problem | Learned on the job | Sometimes included | Read before submission |
| Release control and rollback | ✕ Single push | Ad hoc | ✕ No halt threshold | Staged tracks with a halt rule |
| Kotlin and Compose codebase | ✕ Template output | Mixed with old Views | Varies by developer | Reviewed, tested, documented |
| Backend and integrations | ✕ Out of scope | Separate team | Simple endpoints | Built alongside the app |
| Signing key and console ownership | Varies | Your own accounts | ✕ 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 Android App 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 Android App Development
From Scoping to Contracting to Delivery, One Vendor
Here is everything included when you build your Android app with us:
One Android Build Price: No Hidden Fees, No Surprises.
Every Android 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 Android Review
A written read on your device coverage, background work, Play policy exposure and release process, with the fixes ordered by what breaks first.
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 Android app development agency about devices, background work, policy and releases, so you can test us too.
Included Free
Risk-Free Partnership
Our Android Development 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 Android 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 Android Development Questions
An Android app development company handles the parts of the platform that punish assumptions. It agrees a device matrix from your own analytics, writes the app in Kotlin with Jetpack Compose, tests background work against Doze and the manufacturer battery managers layered on top of it, and treats the Play listing, the data safety declaration and the target API level deadline as engineering rather than paperwork.
Native means the app is written in Kotlin against the Android SDK, so every platform API, sensor and UI behaviour is available the day it ships. Cross-platform means one codebase serving Android and iOS through a shared framework, trading some platform depth for a single team and release cycle. Native suits products where performance, hardware access or platform conventions decide the experience. If you are weighing the two, read our cross-platform app development page.
Cost follows the number of screens, how much work happens offline or in the background, how many devices and OS versions must be supported, and whether a backend is being built alongside it, so a figure before scoping is guesswork. Device coverage moves it more than screen count. We scope first, then price, and itemise each phase so you can cut before you commit.
Ask which devices they will test on and where that list came from. Ask what they do about manufacturer battery managers, because Doze alone is not the whole story. Ask who completes the data safety form and who holds the signing key. Then ask how a release is rolled out and what crash rate halts it. The answers show whether Android is a specialism or a checkbox.
You do, from the first day. The Play Console account, the signing key or Play App Signing enrolment, the repositories and the Firebase project 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.
We agree the matrix before code, built from your own analytics rather than a default. That usually means a minimum API level, a spread of screen sizes and densities, and the manufacturers your users favour, since Samsung, Xiaomi and others layer their own power management over stock Android. Testing runs on real hardware as well as emulators.
By reading the policy before writing the submission. The data safety form is completed from the SDKs the app actually ships, permissions are justified in the listing, billing uses Play Billing where the rules require it, and the target API level is current. Where a rejection looks likely we raise it during scoping instead of at submission.
Often, and they are separate builds rather than one job done twice. The platforms differ in review rules, background behaviour and design conventions, so we scope them together and sequence them, usually shipping one first and applying what launch teaches to the second. The iOS side is covered on our iOS app development page.
Still have questions? Let's talk.
Schedule an appointment with us today!
Ready To Build An Android App That Lasts?
Get a free consultation. We will walk your product, name what will break on real devices, and send a written proposal.
