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I need a cross-platform mobile app that lets field operators working in remote areas calculate equipment depths and lengths in real time even when they have zero connectivity. The build has to run smoothly on both iOS and Android, so feel free to reach for Flutter, React Native, or any other framework you trust that can compile to both stores. Key requirements • All core calculations must work completely offline, with local data persistence and automatic background sync once a signal is regained. • Operators will interact through a touch interface most of the time, but I also want basic voice commands (start, stop, save, cancel, etc.) so they can keep their gloves on. • Depth-and-length formulas should update live on screen as the equipment extends or retracts; no manual refreshes. • The UI has to stay lightweight and readable under harsh sunlight. Deliverables 1. Production-ready iOS and Android builds. 2. Source code with clear comments and a brief setup guide. 3. Simple data export-import mechanism (JSON/CSV) for supervisors. 4. Short demo video proving offline usage and later sync. Acceptance criteria • Calculations remain accurate to within 0.5 % when compared with known measurements. • No crashes or data loss after 48 hours of continuous offline use. • Successful sync of at least 500 stored records once connectivity returns. If something in the workflow feels unclear, let’s discuss it early so the first iteration already heads in the right direction.
ID Projek: 40312344
266 cadangan
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Aktif 19 hari yang lalu
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266 pekerja bebas membida secara purata $3,894 CAD untuk pekerjaan ini

**** Offline-First Cross-Platform App for Field Calculations **** I will build a robust, cross-platform mobile app using Flutter (or React Native) ensuring smooth performance on both iOS and Android. The app will be designed as an offline-first system with local storage, real-time calculation updates, and automatic background sync once connectivity is restored. 1. Core Functionality • Real-time depth & length calculations • Live formula updates (no refresh) • High accuracy computation 2. Offline Capability • complete offline operation • Local data storage • Background auto-sync when online 3. User Interaction • Touch-based controls • Voice commands (start, stop, save, cancel) • Quick input interface 4. Data Management • Save calculation records • Edit/delete entries • Bulk storage (500+ records) Let’s chat … Thanks
$3,200 CAD dalam 25 hari
9.3
9.3

Salutations, I will build a lightweight, cross-platform mobile app for field operators that works offline with reliable local storage and background sync when connectivity returns. My approach is to use Flutter for a single codebase that compiles to both iOS and Android, delivering a clean, glare-free UI designed for harsh sunlight and touch-first interaction. Depth and length calculations will update live as hardware moves, with ultra-fast local persistence and an efficient sync queue to push batches of records automatically once a signal is available. The app will include voice commands (start, stop, save, cancel, etc.) optimized for glove use, using simple, offline-capable recognition that does not rely on network. Data export/import will support JSON and CSV for supervisors, and a lightweight setup guide plus well-commented source code will be delivered. A short demo video will showcase offline operation and post-reconnect syncing. Understanding and approach: The core goal is a robust offline-first calculator and recorder that stays responsive in remote areas. I will design a modular data model with a local database, real-time calculation pipelines, and a resilient sync module. UI components will emphasize readability and tactile feedback, with minimal glare and clear live metrics. The deliverables will be production-ready builds, source with setup notes, and a straightforward data exchange feature to support supervision workflows. Key technical questions I should conf
$5,000 CAD dalam 13 hari
8.9
8.9

&Hello, Regarding your project i would like to discuss the app features in detail to better understand your requirements. i am a mobile applications developer and i have more than 8 years of experience developing mobile applications with backend services. i have completed more than 520 projects either local or internet based. i am confident i will provide you quality software services on time. Let's chat to proceed.
$3,000 CAD dalam 20 hari
8.9
8.9

With over 10 years of experience in web and mobile development, specializing in cross-platform app development, I understand the challenge you face in needing an offline field metrics mobile app for operators in remote areas. The need for real-time calculations and seamless functionality without connectivity is crucial for your project's success. In the realm of mobile app development, I have a proven track record in delivering innovative solutions for various industries, including fintech and healthcare. My expertise in building robust, user-friendly apps aligns perfectly with the requirements of your project. I am confident in my ability to meet and exceed your expectations for this offline field metrics mobile app. Let's work together to bring your vision to life. Feel free to reach out to me to discuss further details and get started on this exciting project.
$4,000 CAD dalam 45 hari
8.2
8.2

HELLO, Offline Field Metrics Mobile App I have similar kind of expertise and work experience. WITH OVER 10 YEARS OF EXPERIENCE IN MOBILE DEVELOPMENT USING FLUTTER, REACT NATIVE, AND OTHER CROSS-PLATFORM FRAMEWORKS, I CAN DELIVER A RELIABLE, OFFLINE-FUNCTIONING MOBILE APP THAT MEETS ALL YOUR REQUIREMENTS. I WILL DESIGN AND DEVELOP A MOBILE APP THAT ENABLES FIELD OPERATORS TO CALCULATE EQUIPMENT DEPTHS AND LENGTHS IN REAL TIME, EVEN IN REMOTE AREAS WITH NO CONNECTIVITY. THE APP WILL HAVE FULL OFFLINE CAPABILITY, WITH AUTOMATIC BACKGROUND SYNC ONCE CONNECTIVITY IS RESTORED. THE UI WILL BE LIGHTWEIGHT, READABLE IN HARSH SUNLIGHT, AND ENABLE TOUCH INTERACTIONS WITH BASIC VOICE COMMANDS FOR HANDS-FREE OPERATION. I WILL ALSO IMPLEMENT LIVE CALCULATIONS THAT UPDATE IMMEDIATELY AS THE EQUIPMENT MOVES. ++++++Service Guarantee++++++ * design of app android ios admin panel * optimised code and well commented to use for future * All latest code to support all version of android and ios phone device. * publish app in google play store and in itune store * setupp server and host app and databse Native and Hybrid application , React Native , Flutter App Android Java/Kotlin, iOS Objective C /Swift/Swift UI etc. DELIVERABLES WILL INCLUDE PRODUCTION-READY iOS AND ANDROID BUILDS, COMMENTED SOURCE CODE, DATA EXPORT/IMPORT MECHANISMS, AND A DEMO VIDEO PROVING OFFLINE FUNCTIONALITY. LOOKING FORWARD TO YOUR POSITIVE RESPONSE. THANKS! BEST REGARDS,
$3,500 CAD dalam 17 hari
8.3
8.3

Hi, This is Elias from Miami. I checked your project description and understand you're looking to build a cross-platform mobile app that enables field operators in remote areas to calculate equipment metrics efficiently. I have developed similar mobile applications that focus on performance in challenging environments. For this project, I propose using React Native for a seamless cross-platform experience, allowing for rapid development and deployment. The app would incorporate local data storage for offline capabilities and leverage JSON for data handling. Performance optimization will be essential to ensure usability in low-connectivity areas. Additionally, I would implement a user-friendly interface that incorporates feedback from field operators to enhance their experience. I’d be happy to go over the details and refine the best approach for your use case. Q1 – What specific metrics do you need the app to calculate? Q2 – Are there any existing systems or tools you would like this app to integrate with? Q3 – What is your timeline for the development and deployment of this app? Looking forward to hearing from you.
$4,000 CAD dalam 30 hari
7.8
7.8

Hi there, This is more of an offline-first field tool than a typical mobile app, and that’s exactly how I would approach it. I will build this using Flutter so we can have a stable cross-platform app, with the entire system designed to work fully offline — calculations, data storage, and user actions will all run locally without any dependency on connectivity. I’ve worked on apps where reliability without internet was critical, especially for real-time calculations and long usage in remote conditions. I will start with setting up a solid local data layer (SQLite) and a real-time calculation engine so values update instantly as inputs change, without any refresh or lag. Alongside that, I will implement a background sync system that safely pushes stored records once the network is available, handling retries and ensuring no data loss even with 500+ entries. For usability in real conditions, I will keep the UI high-contrast, lightweight, and glove-friendly with large touch areas. Voice commands like start, stop, and save will also work offline using on-device processing. I will also include auto-save, simple export (JSON/CSV), and clear sync status so operators always know what is stored offline and what has been synced. I would request to connect once so we can go through your calculation logic and real field workflow to make sure everything fits perfectly from day one. Thanks, Rahul A.
$3,000 CAD dalam 42 hari
7.7
7.7

Hey, I have strong experience in web scraping and backend development using PHP and Python, along with solid experience building cross-platform mobile apps with reliable offline functionality. I’ve worked with tools like Scrapy, BeautifulSoup, and Selenium, and I apply the same structured approach when developing stable, real-time systems for field use. I can build your app using a framework like Flutter or React Native with full offline-first logic, including local data storage, background sync when connectivity returns, and real-time calculation updates on screen. I’ll also integrate simple voice commands for hands-free control, ensure high accuracy in calculations, and design a lightweight UI that remains clear and usable in harsh outdoor conditions. Data export in JSON/CSV and a stable sync system for large record batches will also be included. I keep communication clear with regular updates and provide two weeks of post-launch support to ensure everything runs smoothly in real-world conditions. You can check my portfolio here: https://www.freelancer.pk/u/Hammadhassan21 Let’s start a chat to discuss a few questions, and I’m ready to start immediately. Thanks...
$3,000 CAD dalam 7 hari
7.1
7.1

⭐⭐⭐⭐⭐ At CnELIndia, we understand the importance of building robust and reliable mobile apps, especially for field operators working in remote areas. With our 18 years of industry experience and expertise in both Android and iOS development as well as proficiency in frameworks like React Native, we're ideally positioned to develop your Offline Field Metrics Mobile App to the highest standards. Our team's technical competence ensures that all calculations will work flawlessly offline with local data persistence and automatic background sync once connectivity is restored. We'll also incorporate an intuitive touch interface and basic voice commands to ensure smooth operability while our clear UI design ensures readability even under harsh sunlight. Additionally, our capability to create a simple data export-import mechanism (JSON/CSV) guarantees the fluid movability of measurements for supervisors. Lastly, we take quality assurance seriously, and your project would be no exception. We'll conduct rigorous testing to ensure accurate calculations within 0.5%, uninterrupted data storage even after 48 hours of continuous offline use, and seamless sync upon reconnection with the capacity to handle at least 500 records. With us, you're not just hiring developers; you're partnering with a reliable, conscientious team devoted to delivering what you need. Let's discuss further to get your project headed in the right direction from the start!
$4,000 CAD dalam 7 hari
7.1
7.1

Hi there, I can build your cross-platform mobile app in Flutter or React Native so field operators can calculate equipment depths and lengths in real time, fully offline, and sync automatically once connectivity returns. The app will feature: Offline-first calculations with persistent local storage and reliable background sync. Touch-friendly interface optimized for sunlight readability, plus basic voice commands for start/stop/save/cancel. Live formula updates as equipment extends or retracts—no manual refresh needed. Data export/import in JSON/CSV for supervisors and a clean, commented codebase with setup guide. I’ll deliver production-ready iOS & Android builds, a short demo video showing offline use, and ensure calculations are accurate within 0.5%, stable for 48+ hours, and able to sync 500+ records seamlessly. Kindly send me a message to discuss more. Thanks!
$4,000 CAD dalam 15 hari
7.1
7.1

Hi there, I’ve reviewed your Flutter app requirements and would love to help. With 5+ years of experience in cross-platform development, I specialise in clean UI, smooth performance, and robust API integration. I’ll begin with clear planning, share regular progress updates, and ensure the app is fully tested before launch. Let’s connect to discuss your vision — I’m ready to get started! Best, Bhargav Flutter Developer | Android & iOS Expert
$3,000 CAD dalam 7 hari
7.0
7.0

Hi there, I will build your offline-first field metrics app in Flutter with real-time depth and length calculations, local persistence using Hive or SQLite, and automatic background sync when connectivity returns. The app will include voice command support for gloved operation, live formula updates as equipment extends or retracts, and a high-contrast UI optimized for direct sunlight readability. Data export in JSON and CSV will be built in for supervisor workflows. For the offline sync layer, I will implement a conflict resolution strategy using timestamped records with a queue-based sync engine - this ensures that if two operators update the same record before reconnecting, the system handles merges predictably rather than silently overwriting data. I will also add a local integrity check that validates calculation accuracy against reference values before marking records as sync-ready. Questions: 1) For voice commands, should the recognition work fully offline as well (on-device speech model), or is a basic keyword detection approach acceptable? 2) Will the background sync target a specific backend or API, or do you need me to set up a lightweight server component alongside the app? Looking forward to discussing further. Best regards, Kamran
$3,500 CAD dalam 30 hari
7.4
7.4

Mobile App Expert Hi, I can help you build a reliable cross-platform mobile app (iOS & Android) that works fully offline with real-time calculations. I’ll use Flutter to ensure smooth performance and implement an offline-first architecture with local storage and automatic sync when connectivity returns. The app will support live calculation updates, basic voice commands, and a simple, high-visibility UI for field use. You’ll receive: Production-ready builds Clean source code + setup guide JSON/CSV export-import Demo showing offline usage and sync I’ll ensure accuracy, stability for long offline sessions, and reliable data sync. Due to NDAs, links aren’t public—but once you open the chat, I’ll share live demos and walkthroughs. Available to start immediately and happy to discuss details. Let us connect over chat. Thanks, Srishti
$3,500 CAD dalam 40 hari
7.0
7.0

Hi there To build a reliable offline field app that performs real-time calculations with zero connectivity, the most critical part is designing a stable local data layer and sync mechanism that preserves accuracy and prevents data loss. I’ll approach this by structuring the app with an offline-first architecture where calculations, storage, and state updates happen locally, while background sync handles reconciliation once connectivity returns. This means operators can work continuously in remote environments, with live updates on screen, consistent data storage, and smooth synchronization later without conflicts. My process is simple. First, I define the calculation engine, local storage model, and sync strategy for offline reliability. Then I build the mobile app with real-time updates, voice command handling, and optimized UI for field visibility. After scope and requirements are confirmed, I will provide the exact timeline and budget for a robust and production-ready solution. If it aligns with you, let’s discuss in detail via private chat.
$4,000 CAD dalam 7 hari
6.6
6.6

We will not only develop your application like other freelancers do. We will also make sure that your application becomes successful. Along with development, we will provide you with many additional services so that your business can grow and reach a value of millions of dollars. Hello Dear, I am a top-rated highly experienced mobile app developer with a proven track record of successfully creating numerous high-quality applications. I can build a reliable cross platform mobile app for iOS and Android that performs real time depth and length calculations fully offline with accurate results smooth live updates and secure local data storage with automatic background sync once connectivity returns I will include simple voice commands for hands free control design a lightweight sunlight friendly interface and deliver production ready apps clean documented source code easy JSON or CSV data export and a demo showing stable offline use and successful syncing of large datasets. Please Take a Look at My Professional Portfolio: https://www.freelancer.pk/u/zainalitariq245 I look forward to your response. Best Regards, Zain
$3,000 CAD dalam 30 hari
6.3
6.3

Hello, I believe I'm the perfect fit for your Offline Field Metrics Mobile App project. At Curveball, I've built numerous apps that focus on offline functionality and data persistence, making me well-equipped to handle the challenge of ensuring smooth performance without connectivity. Additionally, I'm proficient with both Flutter and React Native - offering you the flexibility to choose the framework that suits your needs best. The live updating of depth-and-length formulas is a crucial aspect of your project, which we also understand deeply at Curveball. Our expertise in real-time data integration will ensure that all equipment adjustments are reflected accurately and immediately on-screen. This empowers field operators to make informed decisions at all times, facilitating their work significantly. Lets Chat
$4,500 CAD dalam 25 hari
6.4
6.4

Hello, I hope you are doing well. I understand that you are looking to build an OFFLINE FIELD METRIC MOBILE APPLICATION, and I would be happy to help. I have extensive experience in designing and developing applications and have successfully delivered many projects. What I offer: -Development using the latest technologies -Daily project updates and clear communication -On-time delivery within the agreed timeline -Complete source code provided after project completion -One year of support for the developed work -10+ years of experience in web and app development -Fully responsive, fast-loading, and SEO-friendly design -A powerful super admin panel to manage the entire system Please feel free to initiate a chat so we can discuss your requirements in detail. Thank you and regards, Dheeraj K.
$3,000 CAD dalam 25 hari
7.0
7.0

Hi I will be able to help you in your Field Metrics Mobile App. 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 & React- Native and for web and backend on react js and node js, Python Django , java spring boot and php CodeIgniter mvc. Please consider me and initiate a chat for further detailed discussion. Regards, Anju
$3,000 CAD dalam 45 hari
6.5
6.5

Hey there, I see your need for a cross-platform mobile app that functions seamlessly offline is critical, especially with calculations that must remain precise. Ensuring accurate real-time calculation visibility without connectivity is my forte. I'll deliver an app using Flutter or React Native since they provide robust frameworks for targeting both iOS and Android effectively. I've built a similar app for an oil-field company where it processed data offline with 99.9% accuracy, achieving seamless synchronization when back online. I include 30 days of post-deployment bug-fixing, ensuring smooth operation. Do you have specific voice commands already in mind or should I propose some? Let's discuss your project's details further.
$3,250 CAD dalam 20 hari
5.9
5.9

Hello There!!! ★★★★ ( Cross-Platform Offline Field Metrics App ) ★★★★ I understand you need a mobile app for field operators to calculate equipment depths and lengths fully offline, with live updates, voice commands, and smooth iOS/Android performance. Data must sync automatically when connectivity returns, and the interface should be readable in harsh sunlight. ⚜ Cross-platform mobile development (iOS & Android) ⚜ Offline calculations with local persistence ⚜ Automatic background data sync ⚜ Touch and basic voice command interface ⚜ Live depth-and-length calculations ⚜ Lightweight, sun-readable UI/UX ⚜ Data export-import via JSON/CSV I have experience building Flutter and React Native apps with offline capabilities and accurate calculations. I’ll ensure stable, production-ready builds, clear documentation, and demo video showcasing offline performance and sync reliability. Warm Regards, Farhin B.
$3,000 CAD dalam 15 hari
6.5
6.5

Richmond, Canada
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