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HIIS
Services

Mobile Development

Cross-platform and native mobile apps users love.

Cross-platform and native apps with Flutter, React Native, Swift and Kotlin.

Talk to an expertSee our work
main.dart
Widget build(BuildContext ctx) {
  return Scaffold(
    body: Center(child: Text('HIIS')),
  );
}
flutter_app · debug
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Platform

Offline ready
Biometric auth
60 fps

What we deliver

01

Flutter & React Native cross-platform apps

02

Native iOS (Swift) & Android (Kotlin)

03

Offline-first & real-time features

04

App Store & Play Store delivery

Use cases

Real problems we solve for teams like yours.

01

Consumer apps with millions of users

Flutter and React Native apps built for App Store + Play Store launch, with CI/CD pipelines for rapid iteration.

02

B2B enterprise mobile tools

MDM-compatible, role-gated apps for field teams, logistics workers, and enterprise users.

03

Healthcare & fintech apps

HIPAA/PCI-compliant apps with biometric auth, offline capability, and secure data sync.

04

IoT companion apps

Mobile interfaces that talk to hardware via Bluetooth LE, MQTT, or WebSocket for real-time device control.

Why teams choose HIIS

One codebase, both stores

Flutter gives us near-native performance from a single codebase, shipping simultaneously to iOS and Android.

Native modules when it matters

For camera, BLE, biometrics or platform-specific UX, we write native Swift/Kotlin modules bridged into the cross-platform app.

OTA updates

We ship hotfixes and feature flags over the air using Code Push, avoiding 5-day App Review delays for critical fixes.

Analytics & crash reporting

Firebase Analytics, Sentry and custom events are wired from day one so you see what users actually do in production.

See it in action

Live, interactive demos of what we actually build and operate.

App Store · com.hiis.app
iOS
h!

HIIS Mobile

HIIS SARL · Productivity

★★★★★4.8 · 128.4k+

Ratings distribution

5★
15%
4★
8%
3★
4%
2★
2%
1★
71%
Version 3.2.1 · 48MB↑ 128,450 DLs
push-service · production
FCM/APNs

Notification delivery

O

Orders

Your order ORD-982 has shipped! 📦

now
F

Finance

Payment of $149 confirmed ✅

2m
C

Chat

New message from Sarah: 'Ready for standup?'

5m
✓ iOS APNs✓ Android FCM✓ Web Push

Technologies we use

Mobile

Flutter

Beautiful, fast cross-platform apps from a single Flutter codebase.

Deep dive
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Frequently asked questions

Flutter for greenfield projects that need pixel-perfect custom UIs and maximum performance. React Native when you have an existing JavaScript team or need to share more code with a web frontend.

We manage the full submission pipeline, including screenshots, metadata, privacy manifests and binary validation, and have streamlined the process to a predictable timeframe of under five working days.

Yes. We can refactor a legacy native app incrementally, migrate from React Native to Flutter, or rebuild from scratch with a documented migration plan that keeps the existing app live throughout.

Unit + widget tests (Flutter) or Jest + Detox (React Native), device-farm testing across a matrix of physical and virtual devices, and beta testing on TestFlight/Play Internal Track before every release.

Testimonials

Trusted across industries

From public institutions to crypto exchanges, teams choose HIIS to ship software that performs, and they say so.

  • AI
    “We carried decades of legacy systems. HIIS delivered secure, well-documented APIs and an AI document-classification pipeline in Python and Hugging Face that cut manual processing by 60%.”
    Claire MensahClaire MensahHead of Modernisation · National Records AgencyGovernment
  • “HIIS built our spot exchange, order book, wallets and KYC, to take real volume under load. We have run at sub-50ms order latency and 99.99% uptime since launch.”
    Marco RossiMarco RossiFounder & CEO · Vertex ExchangeFinance & Crypto
  • “Our headless storefront on Next.js loads in under a second and conversion is up 38%. HIIS sweated every Core Web Vital.”
    Isabelle MoreauIsabelle MoreauVP of Ecommerce · Lumière Retail GroupEcommerce
  • AI
    “HIIS built offline-first farm-management tools that sync the moment our growers get signal, plus TensorFlow yield-forecasting models, output up 22% and waste down 30%.”
    Aïcha TraoréAïcha TraoréChief Executive Officer · GreenField AgritechAgriculture
  • “HIIS delivered a HIPAA-compliant telehealth platform, secure video, scheduling and e-prescriptions, that our clinicians actually enjoy using. Wait times fell 45%.”
    Dr. Sarah ChenDr. Sarah ChenChief Medical Officer · Lumen HealthHealth
  • AI
    “The mobile banking app HIIS shipped in Flutter feels instant, and their real-time AI fraud-scoring models caught threats we were missing, dropping fraud losses by 40%.”
    David OkekeDavid OkekeHead of Digital Banking · Meridian Retail BankBanking
  • AI
    “HIIS built a multilingual semantic search engine across 20+ African languages using RAG, OpenAI and a vector pipeline, sub-300ms over 100M+ documents.”
    Olivier NkurunzizaOlivier NkurunzizaFounder · Sahara AISearch
  • AI
    “The AI recommendation engine HIIS built lifted our average order value noticeably, personalised discovery that genuinely converts.”
    Mei LinMei LinChief Digital Officer · StyleNestEcommerce
  • “Our core payments engine, re-engineered by HIIS in Scala and Kafka, clears five million transactions a day at sub-100ms latency. It has stayed rock-solid through every peak.”
    Sophie LaurentSophie LaurentChief Technology Officer · Atlas Commercial BankBanking

Other services

Backend Development
Web Development
Custom Software

Have a project in mind?

Tell us about it, we'll get back to you within 48 hours.

Talk to an expertSee our work