Native iOS and Android applications
Swift and SwiftUI for iOS, Kotlin and Jetpack Compose for Android, for apps that need deep device access or the best possible performance.
Mobile App Development
Mobile app development for iOS and Android
Native apps in Swift and Kotlin and cross-platform apps in React Native and Flutter, built for real-world usage and maintained long after launch, with store releases handled end to end.
A mobile app has to work in places a website never sees: poor connections, old phones, background restrictions and store reviews that can delay a launch by days. We build apps with those conditions in mind, from the first screen to the release checklist.
For most products we recommend one cross-platform codebase in React Native or Flutter, which keeps cost and maintenance down while still feeling native. When an app depends heavily on device features, such as health data, Bluetooth hardware or advanced camera work, we build natively in Swift and Kotlin. We explain the trade-off for your app before you choose.
We handle App Store and Google Play submission under your own developer accounts, set up push notifications, analytics and crash reporting, and stay on after launch for OS updates and new features.
What is included
Cross-platform apps from a single codebase
React Native and Flutter apps that share most of their code across iOS and Android, so features ship to both platforms at the same time.
App Store and Google Play submission and compliance
Store listings, screenshots, privacy disclosures and review guidelines handled for you, with fixes if a reviewer asks for changes.
Payments, health data, maps, push and offline sync
In-app purchases and subscriptions, Apple Health and Google Fit, location and maps, push notifications, and offline storage that syncs when the connection returns.
Ongoing maintenance and OS version upgrades
Each new iOS and Android release can break something. We test against new versions, update dependencies and keep your app accepted by both stores.
How we work
- 01
Discovery and platform choice
We map the core user journeys and decide between cross-platform and native based on the features your app needs.
- 02
Design and clickable prototype
Screens and flows designed for both platforms, tested as a prototype before development starts.
- 03
Build in milestones
Features delivered in milestones with test builds on your phone through TestFlight and internal testing tracks.
- 04
Store release and support
Submission to both stores under your accounts, then monitoring, fixes and updates after launch.
Tech stack
- Swift
- Kotlin
- React Native
- Flutter
- Objective-C
- SwiftUI
- Java
- Jetpack Compose
- Dart
- Expo
- Firebase
- Supabase
- Twilio
- Agora
- PubNub
Pricing
Every project starts with a free discovery call and a written estimate split into milestones. Choose the model that fits:
- Fixed-price project. A written scope split into milestones, each with a fixed price and deliverable. Best when requirements are clear.
- Hourly. Pay for the hours worked, with time tracked and reported. Best for ongoing changes, audits and evolving scope.
- Dedicated developer or team. Developers assigned to you on a monthly contract, working your business hours as an extension of your team.
- Maintenance and support. 24/7 monitoring against a 99.9% uptime target, plus fixes, updates and small features after launch, as needed or on a monthly plan.
Mobile App Development projects
- Mobile
- UI/UX
LucoPet Mobile App
The mobile companion to the LucoPet ecosystem, carrying the same 3D design language to iOS and Android.
- Mobile
Blue Rota
Mobile app design and development for Blue Rota.
- Mobile
- UI/UX
Smart Angel
App design and development for Smart Angel.
N
Audio Streaming
- Next.js
- Node.js
- GKE
- Firebase
- Agora
- Web
- Mobile
NOICE
Podcast, radio and audiobook streaming platform on web, iOS and Android, built on 7 microservices.
7microservices in production
FAQ
Mobile App Development questions
What clients usually ask before starting a mobile app development project with us.
Another question? Email info@mercurysols.org.
Should we build native or cross-platform?
For most business and consumer apps, cross-platform with React Native or Flutter is faster and cheaper to maintain. Native makes sense when the app relies on advanced device features or heavy graphics. We recommend one after reviewing your feature list.
Do you publish the app to the App Store and Google Play?
Yes. We prepare the listings and handle submission under your own developer accounts, so the app and its reviews stay yours. Store review times are set by Apple and Google, so we plan launch dates with a buffer.
Can the app work offline?
Yes. We store the data the user needs on the device and sync changes when the connection returns, with rules for handling conflicts.
Can you connect the app to hardware or wearables?
Yes. We have connected apps to smart home devices and to health platforms such as Apple Health. We confirm the device APIs early, since they often decide the approach.
Do we need a backend as well?
Usually, yes, for accounts, data and notifications. We build it with Node.js, Python, Firebase or Supabase depending on the app, and it can also serve a web version later.
What happens when a new iOS or Android version is released?
We test your app against the beta versions and ship any fixes needed, either as needed or as part of a maintenance plan.
Other services
Have a project in mind? Let's talk.
Tell us what you want to build. New builds, ongoing work or maintenance, on fixed-price, hourly or dedicated-team terms. We reply within 1 business day.
- We read your brief and reply within 1 business day
- A short call to agree goals and scope
- A written proposal with milestones and cost