Available for new opportunities

Mustafa
Bhatkar

Building apps for every screen you own.

8 years building apps people actually love — 2.2M+ downloads on Google Play, native Apple Watch and Wear OS companions, web apps, and now Latch on the Mac. Based in Mumbai, shipped globally.

2.2M+
Downloads
4.9★
Avg Rating
15+
Apps Published
4
Platforms
Desktop Latch 112°
havabee.com
Web HavaBee
Mobile Breathe
Wearable watchOS
Mobile
Flutter on iOS & Android · 2.2M+ downloads
Breathe Sounds Pocket No Smoke Time Travel Sip
Wearable
Breathe — SwiftUI on watchOS, Compose on Wear OS
Web
Hand-built sites & web apps · React, Firebase
HavaBee Grasp
Desktop
Latch — SwiftUI, AppKit & Metal on macOS
Latch Download on the Mac App Store

One developer.
Every screen.

I build apps that people genuinely enjoy using — clean, thoughtful, and polished to the App Store level. With 7.5 years in mobile development (6.5+ in Flutter), I've taken apps from zero to millions of downloads, entirely through craft and care.

Then I kept going past the phone: watch apps for Apple Watch (SwiftUI) and Wear OS (Jetpack Compose), Home Screen widgets with WidgetKit and Jetpack Glance, web apps in React, and Latch — a native macOS app in SwiftUI, AppKit and Metal. Same care, whatever the screen.

Flutter SwiftUI Jetpack Compose React Dart Swift Kotlin macOS / AppKit Metal Shaders App Intents watchOS / WatchKit Wear OS / Compose WidgetKit (iOS) Jetpack Glance Platform Channels Firebase Spring Boot flutter_bloc Figma
💻

Now Shipping on the Mac

Latch, my first macOS app, launched on the Mac App Store in September 2026 — phone, wrist, web, and now the desktop.

🏆

Google Play Social Impact Star

Breathe recognized by Google Play in 2022 for its contribution to mental well-being and accessibility worldwide.

🎙️

Amazon Alexa Game Dev Winner

Won the Amazon Alexa Game Development Contest (MindSumo, 2018), selected among global participants.

📚

Flutter Educator

Taught Flutter to college students alongside active app development, giving back to the next generation of mobile devs.

Loved by millions, on every screen.

Pick one to dive in.

01 Latch Lid Actions & Animations New macOS
Native on the Mac
Inside the app

A menu-bar app written in SwiftUI and AppKit — sandboxed, no network code, and on the Mac App Store.

Latch Animations tab: the animation tracks the real lid angle, with a preview and a start and end angle Latch Actions tab: run a Shortcut or dim the screen when the lid closes past 45 degrees Latch Journal tab: when the Mac was opened today and on each earlier day
02 Breathe Relax & Focus iOSAndroidwatchOSWear OS
Also on your wrist
Native Watch Companions

Breathe runs standalone on both smartwatch platforms — guided sessions delivered directly on your wrist, synced with the phone app.

Built from scratch in WatchKit & SwiftUI, synced with the iOS app via WatchConnectivity.

Breathe Apple Watch - Session List
Session List
Breathe Apple Watch - Session Screen
Session Screen
Breathe Apple Watch - Breathing Animation
Breathing Guide
Breathe Apple Watch - Pattern Details
Pattern Details

Built with Kotlin & Jetpack Compose for Wear OS — the same sessions, redrawn for a round display and the rotating crown.

Breathe Wear OS - Session List
Session List
Breathe Wear OS - Session Screen
Session Screen
Breathe Wear OS - Breathing Animation
Breathing Guide
Breathe Wear OS - Pattern Details
Pattern Details
03 Sounds Focus & Sleep iOSAndroid
04 Pocket Expense Tracker iOSAndroid
05 No Smoke Quit Smoking Today iOSAndroid
06 Time Travel World Clocks & Time Zones iOSAndroid

Other builds from the Havabee studio

havabee.com
The HavaBee studio website
HavaBee Website
The studio's home on the web, hand-built in HTML, CSS and vanilla JavaScript — every app with its story and store links, light and dark themes that follow the system, and the landing pages behind Sounds' shareable mix links and Latch's deep links.
Visit havabee.com ↗
Grasp
Grasp Web App
A modern, QR-powered digital menu and ordering system built for Grasp Café, Doha. Scan. Explore. Order — instant access, no app download needed. Arabic & English, real-time Firebase backend, and a full merchant dashboard.
Hospitals For You
🏥
Hospitals For You
Find healthcare facilities near you in Mumbai. Built with Flutter, Spring Boot and MongoDB — helping people find the care they need, fast.

+ Restaurant Menu App, Loan Lending Platform (Infina Finance / Kotak Mahindra Bank), Grocery Delivery Suite, and more.

Physics, but playful.

A side project that turned into 100 levels.

Sip Water Drop Physics Puzzle Android
Native

Native on every platform.

When Flutter can't reach, I go native — Swift on the Mac and the wrist, Kotlin on Android and Wear OS, React on the web.

💻
macOS Menu-Bar App
SwiftUI · AppKit · Metal · IOKit

Built Latch from scratch — it reads the MacBook's hinge-angle sensor over IOKit HID at display rate, drives Metal fragment shaders frame by frame, and publishes App Intents to Shortcuts. Sandboxed and shipped on the Mac App Store.

⌚
Apple Watch Companion
watchOS · WatchKit · SwiftUI

Built a native watchOS companion for Breathe from scratch — guided breathing sessions directly on the wrist, synchronized with the iOS app via WatchConnectivity.

🤖
Wear OS Companion
Kotlin · Compose for Wear OS

Rebuilt Breathe's sessions natively for Wear OS in Jetpack Compose — redrawn for a round display and the rotating crown.

📱
Home Screen Widgets
WidgetKit · Jetpack Glance

Live time-zone widgets for Time Travel on both platforms — WidgetKit in Swift on the iOS Home and Lock Screen, Jetpack Glance on Android — fed from Flutter without opening the app.

🌐
Web Platforms
HTML/CSS/JS · React · Firebase

Hand-built havabee.com and its deep-link pages, led a React scheduling platform at Flocco with Gantt charts and drag-and-drop work orders, and shipped Grasp — a QR-powered web menu on a real-time Firebase backend.

🔗
Flutter Platform Channels
Method Channels · Dart ↔ Swift/Kotlin

Designed and maintained Method Channel architecture enabling seamless two-way communication between Dart and native Swift/Kotlin code across multiple projects.

XP

Where I've worked.

Independent App Developer
Self-employed · Mumbai, India
Feb 2026 – Present
  • Expanded my skill set beyond Flutter into the native platform SDKs.
  • Published 3 new mobile apps on Google Play and the App Store: Sounds, Pocket and No Smoke.
  • Took Breathe to the wrist: native watchOS and Wear OS apps built with each platform's SDK, connected to the Flutter app through platform channels.
  • Published Latch, a desktop app for macOS, on the Mac App Store.
Lead Application Developer
Flocco · Mumbai, India
Nov 2024 – Feb 2026
  • Developed and maintained three in-house Flutter applications, implementing features from Figma designs with smooth UX.
  • Optimized app performance, resolved critical bugs, improved state management and API integrations.
  • Led a React-based scheduling platform (Gantt charts, drag-and-drop work order assignment).
  • Conducted code reviews and mentored junior developers; collaborated cross-functionally with PMs and designers.
Flutter Developer / Lead App Developer
Havabee (Sole Proprietorship) · Mumbai
Jul 2018 – Oct 2024
  • Built and launched 8 apps on Google Play and 6 on the App Store, including Breathe (2.2M+ downloads, 4.9★).
  • Developed client projects: NGO social cause app (Flutter + Spring Boot + MongoDB), restaurant apps, healthcare finder.
  • Transitioned from Native Android to Flutter in September 2019, staying current with every major SDK release.
  • Worked directly with clients to translate requirements into polished, production-ready applications.

Let's build
something great.

Open to full-time roles across mobile, wearable, web and desktop — Flutter or fully native. Based in Mumbai, open to remote.