Mobile App Development
iOS & Android — one codebase with Kotlin Multiplatform.
Mobile App Development: how it works
A mobile app puts your brand in the user's pocket — but it only stays there if it's fast, stable and a pleasure to use. At Saybes we build iOS and Android apps from a single Kotlin Multiplatform codebase, shipping both platforms at the same quality, faster and with lower maintenance cost.
Business logic, data layer and API connections are shared across platforms, while the interface is built with Compose Multiplatform to preserve each platform's native feel. The result: one app that behaves like an iPhone app on iPhone and an Android app on Android.
Behind the app we build a secure, scalable .NET API: user management, notifications, payments and third-party integrations live in this layer. Push notifications, analytics and crash reporting via Firebase are ready from day one.
We run the entire App Store and Google Play release process — store assets, listings, review guidelines, version management. After release we stay with you for updates, new features and OS compatibility.
Our own product Pandu (an exam-prep app) and Reptiq, a fitness-coaching app we developed, are live examples built with exactly this approach.
Five reasons to do this with us
The difference is in the details: how we start, what we consider standard and where we stand after launch.
One code, two platforms
iOS and Android at the same time with Kotlin Multiplatform; faster development, lower cost.
Native feel
With Compose Multiplatform each platform behaves like itself; not a 'web wrapper' app.
A strong back end from one hand
.NET API, database, Firebase and store processes in the same team.
Proven in our own products
Pandu and Reptiq were developed with the same approach and are live in the stores.
Ownership after launch
New iOS/Android releases, bug fixes and new features stay with us under a maintenance agreement.
Scope: what the quote says is what you get.
The following is the standard scope of this service; it is extended to your needs.
Which businesses benefit the most?
With examples from real work we built in different sectors.
Education & content apps
Question banks, mock exams, progress tracking and notifications (e.g. Pandu).
Health, fitness & coaching
Programmes, tracking and an AI-supported coaching experience (e.g. Reptiq).
Loyalty & ordering apps
Ordering, points and campaigns for restaurants and retail.
Field & operations apps
Mobile workflows for dealers, technicians and booking teams.
A proven, current technology stack you can own
No black boxes: every technology we use is open, documented and can be taken over by any team you choose.
The result: four gains measured in numbers
In every project we define the goal at the start, then measure and report after launch.
Shorter time to launch
Both platforms progress in a single sprint plan; you reach the market earlier.
Lower maintenance
One code base: a bug is fixed once.
Store visibility
More organic downloads with store assets, descriptions and ASO.
Measurable engagement
You see what works with push notifications, analytics and crash reports.
How a Mobile App project proceeds
Get a quote →Discovery
We listen to your goals, competitors and users and draw up a clear roadmap.
Strategy
Scope, architecture and content plan, with measurable goals and a timeline without surprises.
Design
Brand-specific, conversion-focused interfaces; you see them first in an interactive prototype, then approve.
Development
Clean code, a fast and secure infrastructure; a working release at the end of every sprint.
Launch & growth
Testing, launch and afterwards continuous improvement with SEO, advertising and data.
Common questions
Get a quote →Why Kotlin Multiplatform?+
One codebase instead of two teams and two apps for iOS and Android: faster development, fewer bugs, lower maintenance. The interface still keeps each platform's native feel.
How long does an app take?+
It depends on scope; a mid-size app usually reaches the stores in 8–14 weeks including design. We share a firm roadmap after discovery.
Do you handle store publishing?+
Yes. Developer accounts, store assets, listings, review guidelines and version management — end to end.
Will it integrate with our existing website?+
Yes. We build it on the same database and API so web and mobile share the same data.
Who handles updates after launch?+
We do. Under a maintenance agreement we keep the app compatible with new iOS/Android versions, fix bugs and ship new features.
Stronger when taken together
Let’s talk about your Mobile App project.
Let’s define the scope together and send you a fixed-price quote within 48 hours.