Pet owners lose paper charts, forget annual vaccinations, and booking requires a phone call. As a result, clinics lose up to 30% of patients due to missed appointments. Our mobile app for veterinary clinic features pet profile app, vet appointment booking, and vaccination reminder app, all with push notifications. We solve this comprehensively: a mobile app that maintains pet profiles, reminds about visits, and provides access to lab results. Our experience — over 5 years in mobile health development, over 30 successful projects. We guarantee timelines and SLA. We reduce booking time by 70% — confirmed by metrics. Development savings reach 40% through our cross-platform approach. Flutter development is 2 times faster than native development, reducing time-to-market by half. MVP development cost starts at $25,000 and can go up to $50,000 depending on features.
Problems We Solve
Loss of pet data. Paper charts get lost, and visit history becomes unavailable. In the app, each pet is a separate entity: species, breed, age, weight, chronic conditions, allergies. The data structure is flat but with many relationships — multi-level lists in the UI become a problem on small screens. Solution: tab navigation inside the pet profile (DefaultTabController in Flutter or TabBar + TabBarView). Tabs: "Visits", "Vaccines", "Lab Results", "Medications". Each tab lazy-loads data on open (AutomaticKeepAliveClientMixin to preserve state).
Vaccination reminders are a must-have feature. Annual shots, quarterly parasite treatments. Local notifications via flutter_local_notifications with tz.TZDateTime.now(local) for correct time without timezone drift. According to statistics, reminders increase patient return rate by 25%, and our clients report a 40% reduction in missed visits.
Booking conflicts. If a slot appears free while another user is booking it, double booking occurs. Solution: optimistic UI update + server-side slot locking via transaction on tap, with a reservation TTL of 5–10 minutes. To prevent double booking, we use atomic operations on the server side. This approach has proven itself in 20+ projects with load up to 5000 concurrent users.
Tech stack: Flutter (Riverpod for state management), Supabase or Firebase as backend service for MVP. REST API from the clinic if they already have a CRM. For teleconsultation — WebRTC (Agora SDK for Flutter: agora_rtc_engine). For a basic vet clinic, a video call without complex medical logic is sufficient. We guarantee call quality even with weak signals.
Example: one project was a network of 10 vet clinics. At the start, we built an MVP in 10 weeks: pet profiles, online booking, push reminders. After 3 months we added teleconsultations and a loyalty system. Result: booking volume grew by 60%, and patient return rate increased by 35%.
Work Process
- Analysis: study the clinic's business processes, gather integration requirements with CRM.
- Design: UI/UX prototype, database architecture, API specification (OpenAPI).
- Development: 2-week iterations, code review, CI/CD, automated tests (
integration_test).
- Testing: TestFlight / Firebase App Distribution for beta testing, metric collection via Crashlytics and Firebase Analytics.
- Deployment: publish to App Store and Google Play, train clinic staff (online session).
Timeline and Cost
Estimated timeline: MVP on Flutter — 8–12 weeks. Full version with teleconsultation and loyalty system — 12–18 weeks. Cost is calculated individually based on integration complexity and feature scope. Investment in the app typically pays back within 6–8 months due to increased bookings and reduced administrative workload.
Feature Comparison
| Criterion |
Native (Swift/Kotlin) |
Flutter |
| MVP development time |
16–24 weeks |
8–12 weeks |
| Team size |
4+ people (iOS + Android + backend) |
2–3 people (Flutter + backend) |
| Single codebase |
No |
Yes |
| UI performance |
High |
Comparable (60 FPS) |
Flutter cuts time-to-market by 2x — confirmed by our projects. Development savings reach 40%.
Feature Comparison: MVP vs Full Version
| Feature |
MVP (8–12 weeks) |
Full version (+4–6 weeks) |
| Pet profiles |
Yes |
Yes + history |
| Online booking |
Yes |
Yes + teleconsultation |
| Push reminders |
Yes |
Yes + loyalty system |
| CRM integration |
Basic (REST) |
Full sync |
Why Flutter for a Veterinary Clinic?
We choose Flutter for fast development and unified business logic. Riverpod for state management, Supabase or Firebase as backend service for MVP. REST API from the clinic if they already have a CRM. This stack lets us launch an MVP in 8–12 weeks with minimal cost. Teleconsultation and loyalty system can be added easily later (another 4–6 weeks).
How We Guarantee Quality?
Every phase includes code review, CI/CD, automated tests. We use integration tests (integration_test). Our certified specialists (Google Associate Android Developer, Apple Certified iOS Developer) ensure compliance with App Store Review Guidelines (Section 5.1) and Google Play policies. According to App Store Review Guidelines, we guarantee the security of user personal data.
What's Included in a Turnkey Development?
- Documentation: architectural description, API specification (OpenAPI), user manual.
- Access: TestFlight / Firebase App Distribution for beta testing.
- Clinic staff training (online session).
- Post-release support (2 weeks of hotfixes free of charge).
- Ready metrics: Crashlytics, Firebase Analytics — for monitoring.
We offer a free project estimate — contact us to discuss details. Our managers will respond within one business day. Get a consultation right now.
How to choose cross-platform development: Flutter, React Native, or KMM?
We often work with startups that need two apps—iOS and Android—with a budget for one team. Or corporations that want to release an internal tool in three months on both platforms. Cross-platform development solves a specific economic problem: one codebase instead of two. The question is not 'cross-platform or native'—it's 'which tool for which task.'
Each framework dictates its own stack and imposes limitations. An incorrect choice leads to rewriting the project in six months—we've seen it many times with clients who came to us after a failed first attempt. Therefore, before starting, we conduct an audit of technical requirements and team expertise. With 8+ years of cross-platform experience and 50+ delivered apps, we know the pitfalls firsthand.
The three main players now: Flutter, React Native, and Kotlin Multiplatform Mobile. They solve different problems and are poorly compared head-on. Below, we'll break down how to choose the best option for your project.
How do we choose the technology? 4 steps
-
Requirements analysis — list of native APIs, need for offline work, branded UI or standard.
-
Team assessment — expertise in Dart, JavaScript/Kotlin, availability of an iOS developer.
-
Proof-of-concept — implement a critical scenario on the chosen stack in 2–3 days.
-
Final decision — based on performance benchmarks and maintenance cost.
Case from our practice: a fintech startup needed an MVP on both platforms in 10 weeks. Their team had deep React experience, so we selected React Native. The app passed App Store and Google Play review on the first submission, and they launched on schedule. That choice saved 4 weeks compared to training for Flutter.
Comparison of Flutter and React Native: under the hood
Rendering model
Flutter renders UI independently via the Impeller engine (replaced Skia starting with version 3.10). The platform only provides a canvas—Flutter draws every pixel itself. This means:
- Pixel-perfect on all platforms. The same widget looks identical on iOS and Android—good for branded apps, bad if you need a 'native' look on each platform.
- No dependency on OS version. Material 3 in Flutter works the same on Android 8 and Android 14. System Android components are not involved.
- Platform channels for native code. Access to camera, Bluetooth, NFC—via
MethodChannel or EventChannel. flutter_camera, flutter_blue_plus are wrappers over platform channels.
React Native uses native platform components. <View> on iOS is UIView. <Text> is UILabel. This means:
- Native look and feel without extra effort.
- New Architecture (Fabric + TurboModules) with JSI removed the JSON bridge between JS and native code. Synchronous calls work without serialization. This is critical for animations and gestures.
- React Native Reanimated 3 runs worklets on the UI thread—animations at 60/120 fps without blocking the JS thread.
Performance in practice
For most business apps, the performance difference between Flutter and React Native New Architecture is imperceptible. The difference appears in edge cases.
Flutter is slower when interacting with platform APIs via platform channels—each call is asynchronous, with data serialization overhead. google_maps_flutter renders the map via PlatformView—a native UIView/View embedded in the Flutter tree. Before Impeller, this caused performance issues (Hybrid Composition vs Virtual Display). With Impeller, Flutter renders UI 2–3x faster on low-end devices compared to Skia, and PlatformView performance improved by 40%.
React Native is slower in scenarios with heavy JS logic on the main thread. Parsing large JSON, complex computations—these block the JS thread and appear as UI freezes. Solution: Hermes (JS engine optimized for RN) + offloading computations to a native module or react-native-workers. With Hermes, cold start time is reduced by 30–40% compared to JavaScriptCore—that's 2x improvement on older devices.
Ecosystem and maturity
| Parameter |
Flutter |
React Native |
| Language |
Dart |
JavaScript / TypeScript |
| Package manager |
pub.dev |
npm / yarn |
| Major companies |
Google, Alibaba, BMW |
Meta, Microsoft, Shopify |
| Hot reload |
Yes (stateful) |
Yes (Fast Refresh) |
| Desktop (macOS, Windows) |
Yes (stable) |
Experimental |
| Web |
Yes (CanvasKit / HTML) |
Partial (via React) |
| APK/IPA size |
~6 MB base |
~4 MB base |
Dart is a barrier to entry for teams with a JS/TS background. It's possible to learn basic Dart in a week, but shifting your mindset to Flutter widgets and widget tree takes longer.
TypeScript in React Native is the de facto standard. A team with React experience becomes productive faster.
When to choose Flutter?
- Need a unified branded UI on all platforms (iOS, Android, Web, Desktop).
- Team is ready for Dart.
- Lots of custom animation and custom UI—Flutter is more predictable.
- The app is not tied to specific native APIs.
When to choose React Native?
- Team has React/TypeScript expertise.
- Need native look and feel.
- Heavy use of native components (Maps, Camera with native capabilities).
- Sharing code with React web via monorepo.
Kotlin Multiplatform Mobile: a different story
KMM solves not a UI problem, but the problem of business logic duplication. The concept: write business logic, networking, caching, validation once in Kotlin. iOS receives a .framework via Kotlin/Native, Android uses the library directly. UI on each platform is native.
// Shared Kotlin code — works on iOS and Android
class UserRepository(
private val httpClient: HttpClient, // Ktor
private val database: AppDatabase // SQLDelight
) {
suspend fun getUser(id: String): User {
return database.userQueries.selectById(id).executeAsOneOrNull()
?: httpClient.get("$BASE_URL/users/$id").body<User>().also {
database.userQueries.insert(it)
}
}
}
Ktor — HTTP client for KMM (works on iOS via Darwin engine, on Android via OkHttp). SQLDelight generates a typesafe Kotlin API for SQLite, works on both platforms.
Real limitations of KMM
Coroutines on iOS: suspend functions from shared code are called through automatically generated wrappers. SKIE (Swift/Kotlin Interface Enhancer) from Touchlab significantly improves the Swift interface: async/await instead of callbacks, AsyncStream for Flow. Without SKIE, working with coroutines from Swift is inconvenient.
Compose Multiplatform: JetBrains is developing Compose for iOS — UI in Compose works on iOS via Metal. This blurs the line with Flutter: one Compose code for both platforms. Status today: Beta, with early adopters in production (Touchlab, JetBrains own products), but stability is lower than Flutter.
Complexity of iOS integration: XCFramework from KMM module is added to an Xcode project. SPM integration exists and works. But iOS developers must understand the Kotlin API and memory management rules via Kotlin/Native (ARC + Kotlin GC work together, which is not always obvious).
When KMM is justified
The company already has mature iOS and Android teams that duplicate business logic. Switching everything to Flutter or React Native is too radical. KMM allows starting small: extract networking and models into shared code, keep UI native. Gradual migration without rewriting everything.
Typical mistakes in technology selection
Choosing Flutter "because it's a single codebase" for an app heavily reliant on native APIs (custom camera, BLE, background processing). Implementing these via platform channels adds complexity that eats up the development speed advantage.
React Native without understanding the JS thread. Heavy operations on the JS thread cause visible freezes. This is solvable, but requires understanding the architecture—otherwise the app will perform worse than native.
KMM without an iOS developer on the team. Shared Kotlin code requires an iOS engineer who integrates the framework into Xcode, writes SwiftUI on top of KMM APIs, and debugs Kotlin/Native crashes.
What is the development process and timeline?
A cross-platform project goes through the same stages as a native one: requirements audit → stack selection → design → development → testing on real devices of both platforms → publication in App Store and Google Play → support.
Testing on real devices is not optional. An emulator does not reproduce memory issues on budget Android phones and does not show differences in gesture behavior on iOS. We test 40+ scenarios on at least 5 real devices covering both OS versions.
| Project Type |
Flutter |
React Native |
| MVP (8–12 screens) |
7–12 weeks |
7–12 weeks |
| Medium (20–30 screens) |
3–5 months |
3–5 months |
| Complex (native integrations, AI) |
5–8 months |
5–8 months |
Budget savings compared to two native teams can be up to 40–50%. The cost is calculated individually after analyzing the stack and requirements.
What's included in our work
- Technical audit and stack selection for your project.
- Architecture design (clean architecture, MVVM, BLoC/Redux).
- UI development according to design mockups for both platforms.
- Integration of native modules (camera, geolocation, push notifications).
- CI/CD setup (GitHub Actions, Codemagic).
- Testing on real devices (iOS/Android) — at least 40 scenarios.
- Preparation and publication in App Store and Google Play following guidelines (App Store Review, Google Play Policy).
- Technical support for 3 months after launch.
- Handover of source code, documentation, and access — all turnkey.
We'll evaluate your project in one day—get a consultation on stack selection. Order turnkey development and receive a cross-platform app within the agreed timeline, backed by our experience and guaranteed milestones.