Android App Development Company for Kotlin and Google Play

Android app development is building native apps for Android phones and tablets, mainly in Kotlin, and releasing them on Google Play. Syndell helps founders, product managers, and CTOs launch stable Android apps across a wide range of devices, and rescues apps that crash, drain batteries, or stall in review.

Tell Us About Your Project

Share a few details about what you want to build.

12+

Years of Experience

1539+

Projects Delivered

20+

Countries from 5 Continents

618+

Clients Served

Trusted by Industry Giants, Enterprises, and Startups

When Clients Call Us Urgently

If one of these sounds familiar, this is where we step in.

We start with an audit of the code, crash reports, and release setup, then give you a written plan.

The App Crashes on Some Phones but Not Others

Android runs on thousands of device and OS combinations. We reproduce crashes on real devices, read crash reports, and fix the cause. Crashes drive uninstalls and one-star reviews.

Google Play Flagged or Rejected Your App

Policy, permissions, and target-version rules change often. We read the notice, fix the app or the listing, and resubmit. A blocked release delays revenue and marketing plans.

The App Is Slow and Drains the Battery

Background work, heavy screens, and unbounded network calls are the usual causes. We profile with Android Studio tools and fix the worst offenders first. Battery complaints push users away.

The Codebase Is Old Java That Nobody Wants to Touch

We move it to Kotlin and modern UI in stages, one screen at a time. That makes hiring easier and new features quicker.

Android App Development Services

Six kinds of Android application development we deliver, for new apps and existing ones.

Custom Android Apps

Consumer and business apps in Kotlin with Jetpack Compose, built for phones and tablets.

API and Back-End Integration

Connect the app to REST or GraphQL services, Firebase, or your own back end, with offline handling.

Device and AI Features

Camera, location, notifications, Bluetooth, biometrics, and payments, tested on real devices. On supported devices we can add on-device AI through ML Kit GenAI APIs and Gemini Nano.

Google Play Launch

Store listing, signing, testing tracks, and release management.

Migration and Modernization

Move older Java apps to Kotlin and current Android libraries in stages.

Testing, Maintenance, and Support

Crash monitoring, OS-update fixes, and new features on a monthly retainer or on demand.

Need Android Engineers in Your Own Team?

See Hire Android Developers

Why Build a Native Android App?

Deep Device Access

Native code reaches every Android feature, from sensors to widgets, on release day.

Wide Reach

Android runs on a large share of phones worldwide, across many price points.

Smooth, Familiar Interfaces

Jetpack Compose and Material Design give users controls they already know.

Google's Tooling

Android Studio, Firebase, and Play Console support building, testing, and releasing.

Kotlin vs Java for Android

Kotlin

Java

Google's Recommendation

Kotlin

The Preferred Language for New Android Apps

Java

Still Supported

Code Size

Kotlin

Shorter, Less Boilerplate

Java

Longer

Null Safety

Kotlin

Built into the Language

Java

Left to the Developer

Modern UI (Jetpack Compose)

Kotlin

Designed for Kotlin

Java

Limited

Best Fit

Kotlin

New Apps and Rewrites

Java

Older Codebases You Keep for Now

Building for both iPhone and Android from one codebase? See our Flutter page or React Native page.

Not Sure Whether Native Android Fits Your Plan?

We will tell you plainly.

How an Android App Gets Built

Scope and Device Targets

We define users, features, minimum Android version, and devices.

Design for Android

Screens follow Material Design, with a clickable prototype you approve before build.

Build in Sprints

Each sprint ends with a test build on Google Play internal testing.

Test on Real Devices

Automated tests plus checks on a range of phones, with performance profiling.

Release and Support

We prepare the Google Play listing and release, monitor crashes, and stay on for updates. Button: Book a Consultation Bring your app idea or existing code and we will map it to these steps.

Bring your app idea or existing code and we will map it to these steps.

Case Studies

Holistic Wellcare Advisers

HealthTech / Wellness Marketplace

Wellness sessions rarely happen at a desk. The HWA mobile app brings the practitioner and client experience to a phone, letting clients browse packages and book at-home, virtual, or in-person sessions while practitioners manage availability, bookings, and package payments wherever their day takes them, between sessions or on the road.

Mobile App DevelopmentSession BookingPackage & Payment TrackingPractitioner & Client Experience

Read Case Study

100%CONFLICT-FREE BOOKING

24/7SELF-SERVE BOOKING, NO CALLS NEEDED

100%AUTO-SYNCED GOOGLE & OUTLOOK CALENDARS

Zoundslike

EdTech / AI Language Learning

Zoundslike does the hard part well – AI-powered, game-based English practice paired with live peer-to-peer speaking sessions. The platform wasn’t carrying its weight: core flows were incomplete and unstable, no mobile app existed yet, and unresolved audio issues undermined the entire speaking-practice experience on iOS.

Product UX/UIAI Feature DesignWeb App RebuildiOS + Android DevelopmentMarketing Website

Read Case Study

125k+DOWNLOADS

24k+ACTIVE USERS

100k+GAMES PLAYED

Enlace Ganadero

Agriculture / Livestock Trading Marketplace

Enlace Ganadero does the hard part well – connecting livestock buyers and sellers across the Americas for deals worth as much as a house. The starting prototype wasn’t carrying its weight: buyers had only a handful of photos, no way to compare listings, and no real trust signals before committing.

Mobile App DevelopmentBackend DevelopmentAdmin DashboardWebsite Design & Development

Read Case Study

10+CATEGORIES TO BUY, SELL, OR BID ON

2WAYS TO SELL, DIRECT LISTING OR AUCTION

2LANGUAGES, SPANISH & ENGLISH, YOUR CHOICE

Industries We Build Android Apps For

Why Choose Syndell as Your Android App Development Company

99%

Clients Recommendation

12+

Industries Served

1539+

Projects Delivered

618+

Happy Clients

✓

Full Lifecycle Android App Development

✓

Agile & CI/CD Delivery

✓

Established Development Team

✓

Verified Client Reviews

✓

Flexible Engagement Models

✓

Security & Confidentiality

What Our Clients Say About Us

Syndell has demonstrated excellent problem-solving skills, quickly addressing any issues that arise. The team is responsive and attentive to the client’s needs, and internal stakeholders are impressed with the service provider’s value-driven approach.

Nicole Powell

Owner, Branding Marketing Firm

The partnership with Syndell has provided the client with consistent good traffic for several years. Despite the time differences, the vendor has stayed responsive and is easily accessible via Skype, email, and other outlets. Their timely and helpful approach is commendable.

Jared White

Owner & Marketer, JBZ Beats Inc.

Thanks to Syndell’s efforts, the client started to get more leads. The client was very happy and excited about the results. Syndell provided exceptional communication and support throughout the engagement. The client described the whole process as easy.

Allan Brown

Principal, Resumes by Allan Brown

Thanks to Syndell’s efforts, the client received positive reviews and increased traction on their website. The team was professional, timely, and responsive to the client’s needs. They also provided valuable recommendations that facilitated the client’s decision-making process.

Raunak Shah

Business Owner, GenNext Learning

Syndell delivered all four milestones on time, ensuring the project progressed as planned. Their team demonstrated their expertise, managed the project efficiently, and answered questions promptly. They also communicated effectively through virtual meetings.

Buck Mclnnis

CEO, Tampa Bay Steel Corp

Syndell successfully delivered a fully functional platform. They excellently utilized Slack and Skype for all feedback and requests. Above all, their speed and responsiveness were the highlights of the engagement.

Tobi Lawson

Co-Founder, Praiki Technologies Ltd

Syndell continues to satisfy end clients with their excellent development work. Leading a straightforward and efficient workflow, the team follows directions well and collaborates closely with the client. Their attention to detail and excellent customer support are highlights.

Jay Thakker

President, Imprografix, LLC

Syndell has delivered an excellent product that matches the client’s requirements. They have been highly responsive and flexible in meeting tight deadlines. They’re an approachable team that offers quality services.

Paul Smith

Managing Director, Viva Digital

The client was very satisfied with the end product, describing it as amazing and reasonably priced. Syndell impressed with their strong project management and communication skills, which helped them ensure a seamless customer experience.

Pawel Tugeman

CEO, Lazy Rida Beats

I’ve been thoroughly impressed with the expertise of Syndell. Their support is exceptional. They’ve swiftly addressed any issues that arise. I’ve already experienced great results with their SEO and website development, and I’m looking forward to exploring their mobile app development and AI development services soon. I highly recommend them to anyone looking for reliable and innovative solutions!

Nicole Powell

Owner at HALCON

We have worked with Syndell Technologies for nearly 10 years as our outsourced partner and found their team to be reliable, available, prompt with a broad range of expertise.

Paul Smith

Owner of Viva Digital

Syndell has been a tremendous asset to our tax consulting firm. They built a modern, professional website tailored to our clientele and also developed a secure, custom software system for managing client records and compliance workflows. The team is technically strong, responsive, and easy to communicate with. We’ve already seen time-saving improvements internally. Highly recommend them to any professional service business needing a digital upgrade.

Garima Bhandari

Partner at G N Financial Services

Excellent service, quick response to changes and editing the website, professional service that is hard to find these days.

Zohany Pulido

Owner, QPI, Inc

Fantastic experience with Hiren building our website. He was very skilled and creative and fast. I will definitely work with him again! I’d give him 10 stars if possible.

Candace Pendleton

Owner, Commodities University

Engagement Models and Pricing

Model

Best For

Billing

Scope Changes

Fixed Price Model

Best For

A First Release with a Fixed Feature List

Billing

By Milestone

Scope Changes

Change Request

Time and Material Model

Best For

An App That Evolves with User Feedback

Billing

Monthly, by Hours Worked

Scope Changes

Reprioritized Each Sprint

Dedicated Team Model

Best For

A Long Roadmap Across Android and iOS

Billing

Monthly, per Developer

Scope Changes

Directed by You Daily

Every app is scoped individually. Share your budget range on the call and we will show what it covers, then send an itemized proposal.

Recognitions That Reflect Our Commitment

Our expertise has been consistently acknowledged by global platforms and independent reviewers. From mobile app excellence to AI innovation, we’ve earned the trust of leading industry authorities and certification bodies.

App Software Developers 2026

App Development Companies 2026

Top Artificial Intelligence Company 2026

App Development Companies 2026

Top Web Developers 2026

Recognised As A Great Place To Work

Most Reviewed Blockchain Company 2026

ISO 27001 Certified

Top Web Design Company 2026

Top App Development Company 2026

Top Mobile App Development Company 2026

Top Mobile App Development Companies 2026

Top Software Developers 2026

Top Mobile App Developers 2022

Top App Development Company 2026

Top Mobile App Development Company 2026

Top IT Services India 2022

Working Across Time Zones? That's Fine.

We provide our services in the countries below, and we plan our hours around yours.

USA · UK · UAE · Canada · Australia · India

Areas We Serve →

FAQs

How Much Does Android App Development Cost?

Cost depends on the number of screens and features, back-end and API work, design depth, device features, integrations, and testing on many devices. We quote a fixed price for defined scopes and monthly rates for evolving ones. Share your requirements and we will send an itemized proposal.

How Long Does an Android App Take to Build?

It depends on screens, integrations, device features, and how many Android versions and devices you support. We give a timeline after scoping and split it into milestones, so you see working builds each sprint. A focused first release ships sooner than a full product.

How Will We Follow Progress If Your Team Is in Another Time Zone?

We agree overlap hours at kickoff and report through Slack, email, and video calls. After each sprint you get a build through Google Play internal testing to install on your own phone. Syndell has offices in Middletown, Delaware, Manchester, UK, and Ahmedabad, India.

How Do We Publish an App on Google Play?

You need a Google Play developer account, a signed app bundle, a store listing, a privacy policy, and a completed data-safety form. New accounts may face testing requirements before release. We prepare the listing and release under your account, so you own the app.

Should We Build Native Android or Use Flutter or React Native?

Choose native Android for the deepest device access and best platform fit. Choose Flutter or React Native to share one codebase with iOS. We build in all three and recommend after reviewing your features and roadmap. See our Flutter and React Native pages.

Can You Take Over or Update an Existing Android App?

Yes. We audit the code, crash reports, and dependencies, then tell you whether to fix, modernize in stages, or rebuild. You get the recommendation in writing before we change production code, so you can compare the cost and risk of each route before you commit.

Can You Add AI Features to an Android App?

Yes, when the product needs them. On supported devices, ML Kit GenAI APIs can run Gemini Nano on the phone, which works without a network connection and keeps data local. Custom models can run through LiteRT, and cloud AI through Firebase AI Logic or your back end. Device support varies, so we plan a fallback.

Our Blogs

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October 15, 2026

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Is Offshore Software Development Safe? What Buyers Must Get Right

Offshore software development is safe with verified vendors, full IP assignment and milestone payments. See the real risks and the safeguards that neutralize them.

Mansi Ramlavat

4 Min Read

October 15, 2026

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SaaS Product Development for Legal Tech Startups: A Complete Guide

A buyer's guide to SaaS product development for legal tech startups: workflow validation, security review, multi-tenant architecture and choosing a partner.

Hitesh Bhoi

4 Min Read

October 15, 2026

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Custom Software Development for Accounting Firms: A Complete Guide

A buyer's guide to custom software development for accounting firms: build-vs-buy, client data security, first releases, and comparing partners.

Arch Sheth

Tell Us What Your Android App Needs to Do.

Share your idea or your existing app. We will review it first and tell you whether to build, fix, or modernize. Want proof first? Browse our case studies.