3-Day Health App Sprint

@AwaisChaudhry

Hello,\n\nI understand that you need a mobile developer who can quickly turn your finished designs and backend services into a live app for both iOS and Android. With everything prepared and a tight three-day timeline, my approach will focus on using Flutter to efficiently build your app, ensuring it conforms to both Apple and Google’s requirements. I will integrate secure user authentication, push notifications, and background tracking features, all while keeping communication swift for any needed UX adjustments. I want to make sure your app is ready for submission with clean code, thorough documentation, and functional builds for testing. What specific metrics or KPIs do you expect to measure the app's success once it's live? Looking forward to collaborating on this exciting project!

@Microlent

Greetings, I am excited about the opportunity to work on your 3-Day Health App Sprint project. With my expertise in mobile development and experience in shipping cross-platform apps, I am confident in my ability to turn your Figma screens, copy, AI models, and REST endpoints into a high-quality, production-ready app for both iOS and Android. I am proficient in Flutter and React Native, and I am committed to meeting Apple and Google store requirements. I will wire up the core features you mentioned, including secure user authentication, push notifications, background tracking, and dashboard/reports functionality. At hand-off, you can expect a clean, well-commented source repository, TestFlight and Google Play Internal Testing builds, final release builds, and a detailed README for easy setup. I am ready to collaborate closely with your team for quick clarifications, UX tweaks, and immediate testing throughout the sprint. If you are looking for a fast, confident developer to bring your vision to life within a tight deadline, I am here to make it happen. Let's start this sprint together and create a successful app that meets your expectations. Looking forward to working with you, https://www.freelancer.com/u/Microlent

@shyamvijaywargiy

Hello , Nice to meet you! I will design and develop HEALTH mobile application with web admin panel according to your requirement , ping me on chat so we can discuss this more. I am expert and 9 years experienced Android /iPhone app developer with backend work that you are looking for. I will provide you perfect product as you want so you would be happy with it. I am always ready to discuss about your project in detail as well as start from right now. The following are my services that i provide :- 1. Daily or Weekly update. 2. Clean and Robust code. 3. Responsible for communication for more than 15 to 20 hours each day. 4. Free Bug-Fix support for 1 year after completion. 5. Source code delivery. You can have a look at my profile by this link : https://www.freelancer.com/u/shyamvijaywargiy Let's contact me to discuss further details with me. Thanks Shyam

@irsolutions

With over 7 years of experience in cross-platform mobile development using Flutter, I understand the importance of turning your pixel-perfect Figma screens and trained AI models into a production-ready health app for both iOS and Android within a strict three-day window. I have successfully completed similar projects in the HealthTech sector, delivering efficient and user-friendly solutions that meet client needs. My expertise in integrating secure user authentication, push notifications, background tracking of activity data, and interactive dashboards align perfectly with your project requirements. I am ready to take on this 3-day sprint and ensure a seamless delivery of the app that meets Apple and Google store requirements. You can count on me to provide a clean source repository, testing builds, final release builds, and a comprehensive README for hand-off. If you are ready to kick off this project and work with a skilled mobile developer who is committed to delivering top-notch results within the specified timeframe, let's connect and get started immediately.

@corpmember29

I HAVE DELIVERED ULTRA-FAST, 48–72 HOUR CROSS-PLATFORM BUILDS — PERFECT FOR YOUR THREE-DAY PRODUCTION SPRINT. With your pixel-perfect Figma, complete API, and trained models ready, I can immediately move into full implementation and ship a store-ready iOS + Android app within 72 hours. My stack of choice for highest speed + stability is Flutter, but I can deliver in React Native if preferred. What I Will Deliver in 3 Days Day 1 — Core Infrastructure • OAuth-secure authentication wired to your live API • Navigation structure + all screens aligned to Figma • FCM push notifications integrated (staging + prod keys) Day 2 — Sensors & Background Services • Passive accelerometer + GPS tracking • Battery-optimized background batching + periodic upload to /sensor • Error handling, retries, and offline caching Day 3 — Reporting Dashboard + Production Prep • Interactive dashboard/reports with touch-friendly gestures • Final polish, QA, and staging deployments • TestFlight build + Play Internal Testing build • Release artifacts for App Store + Google Play submission • README with build steps, env vars, and dependency list Why This Will Succeed • I’ve shipped several cross-platform apps in under 72 hours using ready APIs and Figma flows. • Deep experience with background services, sensors, OAuth, FCM, and high-performance Flutter apps. • Comfortable with rapid, high-communication sprints with distributed teams.

@Julian29

Hello, I’m a senior cross-platform mobile developer with 11+ years of experience delivering production-ready iOS and Android apps under very tight timelines. Since you already have Figma, copy, API docs, and trained AI models prepared, I can move immediately into rapid implementation. I will use the stack that allows the fastest, most stable output — typically Flutter for speed, unified codebase, and smoother store approvals. Your OAuth authentication, FCM push notifications, background GPS + accelerometer tracking, and periodic sensor batching will be wired directly into your existing REST endpoints with strict battery-optimized routines. The dashboard and reporting screens will be implemented exactly as designed, with responsive and touch-friendly UI. I will deliver: • Clean, modular source code in a structured Git repo • Working TestFlight build + Google Play Internal Testing build • Final release-ready builds prepared for store submission • README covering build steps, env variables, and dependencies I’m comfortable working in a high-speed feedback loop with your team, making immediate UI/UX adjustments and validating each endpoint as we progress. Ready to start immediately and commit fully to the sprint. Thanks.

@mikelilei82

Hi there, I'm Lei, a software developer with over 18 years of experience. I have carefully reviewed your project requirements and am confident in my ability to deliver a high-quality solution within the strict three-day timeframe. With a Global Top 3 Ranking on the Freelancer platform for keywords "Flutter" and "iOS," I specialize in mobile development across both platforms. My expertise in Flutter over the past 3 years, combined with 8 years of backend development experience, allows me to deliver end-to-end app solutions with seamless performance and integration. I am well-equipped to handle the core features of your health app project, including user authentication, push notifications, background tracking, and dashboard/report functionalities. I will ensure clean, well-commented code, TestFlight and Google Play builds, and a detailed README at hand-off. You can view my portfolio at https://www.freelancer.com/u/mikelilei82 for examples of my previous work. Please initiate a chat to discuss further details and kickstart this exciting 72-hour sprint. Thanks, Lei

@tangramua

Dear claramchen3,   We carefully studied the description of your project and we can confirm that we understand your needs and are also interested in your project. Our team has the necessary resources to start your project as soon as possible and complete it in a very short time.   We are 25 years in this business and our technical specialists have strong experience in Project Management, Mobile App Development, iPhone, Android, Testing / QA, Software Development, iOS Development, React Native, Flutter and other technologies relevant to your project.   Please, review our profile https://www.freelancer.com/u/tangramua where you can find detailed information about our company, our portfolio, and the client's recent reviews.   Please contact us via Freelancer Chat to discuss your project in details.   Best regards, Sales department Tangram Canada Inc.     

@badarmadni927

Hi, Are you looking for a mobile app developer who can deliver a polished product in just three days? I have experience turning Figma designs into production-ready apps using Flutter and React Native. With your solid backend setup and a clear set of core features, I can quickly integrate secure user authentication, push notifications, and background tracking while ensuring optimal performance and battery management. My approach guarantees that the end result will meet Apple and Google store requirements. I’ll provide a clean source repository, build-ready packages for both platforms, and a concise README with all necessary details. I’m excited about this fast-paced project and can ensure seamless communication with your team for quick adjustments and tests. With over 5 years of experience in mobile development and a focus on cross-platform solutions, I’m ready to help you launch successfully within your tight timeline. Best Regards, Badar Madni

@diektech

hi, I’m Elias. this 72-hour sprint is exactly my kind of rush — i’ll take your pixel-perfect figma, live oauth api, fcm endpoint, and /sensor endpoint and turn them into a production-ready cross-platform app fast. i prefer Flutter for this (single codebase, fast iteration, predictable store submissions) but i can use React Native if you already have CI tuned for it. i’ll wire secure oauth login, fcm push handling, efficient background batching for accelerometer/gps with battery-aware windows, and a touch-friendly dashboard that uses your reported endpoints. i’ll deliver a clean repo, TestFlight & Play internal builds, release artifacts, and a short README with env vars and build steps — all commented and production-minded. Q1: which stack do you want me to use (flutter / react-native / other), or should i pick Flutter to meet the 72hr deadline? Q2: what background interval & max batch size are acceptable for /sensor (e.g., every 5/15/30 mins and up to N events) so i can tune battery vs fidelity? Q3: do you require APNs device-token forwarding to your backend (or should FCM be the single push path with your server translating as needed)? i’m ready to start now — i move fast and keep communication tight. regards, Elias

@technosystem

I am undeniably equipped to take on your 3-Day Health App Sprint. I've accumulated significant experience building and launching complex mobile apps on both iOS and Android, demonstrating my ability to work within tight deadlines while maintaining a high level of quality in code and functionality. From robust social media platforms to intricate crypto trading apps, my work is testament to my adaptability, versatility, and unwavering commitment to delivering what's required. Mastery of authentication integration, including OAuth-based APIs, and push notification systems including Firebase Cloud Messaging ensure I can wire up the core features you need smoothly. My seamless handling of background sensor data tracking with adequate battery management guarantees the best performance possible for your app. To top it off, I'm well-versed in crafting touch-friendly dashboards and reports - aligning perfectly with another essential aspect of your project. Moreover, I am comfortable working with a variety of development tools and hence flexible with adapting to any technology stack you prefer. Alongside my technical skills, I understand the importance of constant communication and collaboration.

@zayertech

Dear Sir, I hope this message finds you well. With 15+ years of experience in Project Management, I’m confident I can bring value to your project by leveraging advanced tools like ClickUp, JIRA, Asana, and monday.com. These tools have enabled me to streamline workflows, optimise efficiency, and enhance project execution. I have successfully led both web and mobile development projects, overseeing all phases to ensure timely and on-budget delivery. My expertise in automation tools has further allowed me to reduce manual tasks and improve team collaboration, driving consistent project success. Clients have praised my commitment to delivering high-quality results and maintaining transparent communication. In addition to technical skills, I offer training in project management and automation tools, empowering teams to excel in their roles and achieve project goals more efficiently. I am eager to collaborate and confident in my ability to help you achieve your vision. Let’s discuss how we can work together to make your goals a reality. Best regards,

@OutsourceMan

With a near-two decade immersion in software development, our firm, CnELIndia, has honed its expertise to ensure unerring time and budget efficiency. We not only specialize in React Native but are conversant with prominent tools like Android and Flutter, guaranteeing you a seamless mobile app experience across both iOS and Android platforms. Our razor-focused sprint of 72 hours? That excites us in ways words can't fully capture! We understand the expectations that come with your health app project and we're ready to exceed them. Our well-documented approach would ensure an uncomplicated handoff process for any future maintenance and updates. Communication is key throughout the project's lifecycle, and we're prepared to keep pace with your team ensuring quick clarifications, immediate testing, UX tweaks - all facilitating maximum productivity. In addition to delivering pixel-perfect front-end designs and well-commented code repositories, we expertise in creating clean, efficient backend infrastructure for app functions such as secure user authentication, push notifications, and background data collection with thoughtful battery management. We've faced similar challenges many times before on our journey through 743 satisfied customers - so you can be rest assured that your project is in reliable hands.

@HamAbbasi00

**20% Discount – Hello!** I’m ready to start immediately and can deliver your full iOS + Android app within 72 hours — we completed a similar cross-platform launch just 3 weeks ago with secure auth, GPS + sensor tracking, and push notifications. You’ll get clean repo, TestFlight + Play Internal builds, store-ready releases, and fast communication to hit every deadline with zero friction.

@malviyamanish

With over a decade of experience and a glowing track record of bringing innovative and impactful solutions to fruition, I am confident that I have the skills and expertise necessary to transform your fully designed project into a production-ready mobile app within the strict 3-day window you've outlined. My team at Bluewebspark Technologies prides itself on not just meeting but exceeding client expectations, no matter the timeline. My fluency in tools like Flutter and React Native, as well as my deep understanding of iOS & Android development pipelines allows me to provide a service that's perfectly aligned with your demands. Whether it's secure user authentication, push notifications or efficient background tracking, my skillset extends exactly where your app needs it. And most importantly, at project handoff, you will receive thoroughly documented clean code

@nikhilgarg96

Hi Thrilled at the opportunity to join your project, I'm Nikhil - a seasoned developer passionate about making a positive impact through my work. Adapting to different technologies and delivering quality code within stringent deadlines is an area where I excel. Having worked on numerous cross-platform app projects in the past using Flutter, React Native, and other tools, I am confident of being able to utilize this experience to turn your meticulously designed Figma screens into a fully functioning health app. Drawing from my comprehensive skill set which includes front and back-end expertise (PHP, Laravel, CI etc.), as well as proficiency in mobile development with Flutter and React Native, I can ensure seamless integration between your polished copy, AI models and REST endpoints. My familiarity with iOS/Android submission standards would ensure that the end product meets requisite industry requirements for hassle-free launch on both platforms. To add value beyond mere code delivery, I have a knack for problem-solving coupled with a creative approach - skills crucial for addressing any possible hiccups during the 72-hour sprint. With open lines of communication high on both our priorities, I assure you of swift and constant feedbacks to incorporate any last-minute UX tweaks or changes into the design. Thanks.....

@pinkeegupta

Hello I have read your requirements and I am sure I will be able to help you. Please message me so that we will have detail technical discussion. I have 9+ years of combined experience in Mobile Application development, Website development, Desktop application development, 3rd party Artificial Intelligence api, AR/ VR, Chatbot, Blockchain- Cryptocurrency, CRM & ERP, Game Development and any other Software development. I am having expertise in Native on Android Java, kotlin and IOS Swift, and For Hybrid Cross platform on Flutter Dart and for web and backend on react js and node js, Python Django, Power BI, Scikit-learn, Data Science AI ML, PyTorch, TensorFlow, SparkML , java spring boot and php CodeIgniter mvc. Please consider me and initiate a chat for further detailed discussion. Regards, Anju

@temoberishvili

Hello there, This sounds like a perfect project for a focused 72-hour build sprint. I’ve delivered several cross-platform apps under tight deadlines using React Native and Flutter, both meeting store requirements for Apple and Google. With your Figma, APIs, and AI models already prepared, I can move straight into implementation — handling secure OAuth login, FCM push notifications, background tracking, and smooth dashboard interactions. I’ll ensure clean, documented code with quick TestFlight and Google Play Internal builds, followed by production-ready releases. My workflow emphasizes speed without compromising quality — perfect for your fast-paced testing cycle and immediate feedback team.

@DeveloperStation

Hi claramchen3, We’ve developed several mobile apps that integrate with backend systems, including a fitness app that uses accelerometer data to track user activity. We also have extensive experience with Firebase, having implemented it for multiple apps to manage user authentication, notifications, and more. We can start immediately and deliver a production-ready app within your 3-day timeframe. We’ll use a fully optimized version of our in-house Flutter framework, which has been tested with multiple apps and is designed to deliver high-quality, fast solutions. Let’s schedule a quick 10-minute call to discuss your project in more detail and ensure I fully understand your requirements. I’m eager to learn more about your exciting idea. Best, Adil