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  • Web Development
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  • Data Engineering & Analytics

Industries

  • Automotive Software Development
  • Fitness & Wellness App Development
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Mobile Apps Built for Real Users, Not Just Demos

We've shipped consumer mobile apps that people actually use, including a move-to-earn fitness app with 140K+ registered users. Our mobile app development services cover native iOS and Android as well as React Native builds, from MVP through App Store launch and long-term support.

See the 140K-user case study

140K+

Registered users, DreamStep

Why the first session decides everything

How many users come back after installing an app? Fewer than most teams expect. Most of the drop-off happens in the very first week, which is why onboarding and first-run performance get real engineering attention in our mobile app development process, not an afterthought.

25%
11%
5%
Day 1Day 7Day 30

Average share of installed-app users still active, by day. Source: Mobile app retention benchmarks, Business of Apps, 2025

Native or cross-platform app development, how to actually decide

Cross-platform app development (React Native) is the right call for most consumer and business apps. One codebase covers both iOS and Android, so it ships faster and stays easier to maintain. This is exactly what we used to reach 140K+ users on DreamStep.

Native development (Swift/Kotlin) earns its extra cost when the app depends on deep platform-specific APIs, heavy background processing, or a level of performance cross-platform frameworks can't reliably hit.

We'll tell you which approach your mobile application development project actually needs during scoping, rather than defaulting to whichever one we'd simply rather build.

Mobile development services we provide

01
React Native development
Cross-platform builds from a single codebase. This is our default for consumer apps unless native development is genuinely required.
02
iOS & Android development
Native builds for cases where platform-specific performance or APIs make cross-platform the wrong tradeoff.
03
Backend & API integration
Node.js APIs, user management, and real-time sync behind the app, not just the client-side interface.
04
App Store & Google Play submission
Review prep, metadata, and the submission process itself, so launch isn't the part that stalls the project.
05
Push notifications & engagement
Retention mechanics such as notifications, gamification logic, and leaderboards, built into the product from the start rather than bolted on afterward.
06
Post-launch maintenance
OS updates, bug fixes, and iteration once real users are on the app and usage data starts guiding priorities.

DreamStep

Move-to-earn fitness app with 140K+ registered users

A React Native app with step tracking, gamification, characters, leaderboards, and an in-app economy, built on a Node.js backend with real-time sync. It's live today and used daily by more than 140,000 registered users.

React Native · TypeScript · Node.js · Real-time Sync

Read the case study

Tech stack

Stack for a mobile app with real-time activity, gamification, and a scalable user base.

Mobile
React Native, TypeScript, Mobile UI
Backend
Node.js, API Services, User Management
Data & Logic
Step Tracking, Gamification Logic, Leaderboard Engine
Infrastructure
Cloud Infrastructure, Real-time Sync, Scalable APIs

Our mobile development process

  1. 01

    Discovery

    Platform choice (native vs. cross-platform), core flows, and what the MVP actually needs to prove.

  2. 02

    Design & prototyping

    UI flows and interaction design validated before development starts.

  3. 03

    Development

    Sprint-based builds against the agreed scope, with working builds you can test throughout the project.

  4. 04

    QA & device testing

    Testing across real device and OS combinations, not just a simulator.

  5. 05

    App Store submission

    We handle Apple and Google review prep, plus resubmission if something gets flagged.

  6. 06

    Launch & support

    Post-launch monitoring and a defined maintenance scope once the app is live.

Frequently asked questions

What's the difference between native and cross-platform app development?+

Native (Swift/Kotlin) is built separately for each platform for maximum performance and API access. Cross-platform (React Native) shares one codebase across iOS and Android, which is faster and cheaper for most consumer apps and exactly what we used for DreamStep's 140K+ users.

How much does mobile app development cost?+

It depends on scope and platform choice. We give a real number once we understand what the app needs to do, not a blanket range.

Will you help submit the app to the App Store and Google Play?+

Yes. Review prep, metadata, and resubmissions if something gets rejected are all part of the engagement.

Do you provide maintenance and support after launch?+

Yes, scoped separately once the app is live and real usage data starts coming in.

Which technology should I choose, React Native or Flutter?+

We build in React Native, which is what we used to ship DreamStep to 140K+ users. We'll tell you honestly if your project actually needs something else.

Can you integrate the app with our existing backend or systems?+

Yes. API integration with existing systems is standard scope in every mobile app development project we take on, not an extra.

Building a mobile app people will actually use?

Tell us the platform, the core flow, and who it's for.

  • Web Development

    Frontend, backend, CMS, and API work for production web platforms.

  • Custom Software Development

    Custom CRM, dealer management, and business software that runs real operations.

  • AI & Automation

    Automation and applied data/AI features integrated into real products.

  • SEO, AEO & GEO Optimization

    Technical SEO, structured data, and AI answer engine optimization built into your site.

  • MVP Development

    Fast, senior-built MVPs that stay solid enough to become the full product.

  • Dedicated Development Team

    Direct access to senior engineers, working as an extension of your team.

Shall we discuss your idea?
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Our offices

Lamana St. 18, 49000 Dnipro, Ukraine

C. de Bailén, 41, Centro, 28005 Madrid, Spain — ILab

Kamelia 47, 8240 Sunny Beach, Bulgaria — R&D office

Contacts

sales@leetsoft.dev
+380 73 758 17 72
+34 663 00 35 61