Application development

Budget: 27000 UAH Deadline: 10 days

Hello! I understand the task: creating a mobile application for communication with audio/video calls, group chats, contact synchronization, 2FA, and technical support.

My approach: I will implement a native or cross-platform application (React Native / Flutter). For calls, I will use WebRTC and a signaling server; for chats, I will use Firebase or a custom backend. I will set up registration via email/phone number, two-factor authentication, push notifications, language change, and a blocked list. I will add VIP levels with extended features. I will integrate technical support through chat or tickets.

Is there a preference regarding the platform (iOS/Android) or a ready-made backend? Let's discuss the details here.

Budget: 27000 UAH Deadline: 21 days

In short, this is not just a mobile application, but a communication platform with real-time chats, calls, account security, support, and paid features. The budget can be discussed, but a project base is needed for a proper assessment. As a safe first step, I propose designing for $2400 over 2-3 weeks. The full minimum version of such a product usually starts from $20000 and depends on video/audio solutions, iOS/Android platforms, and the composition of VIP features.

I see the implementation as follows - first, divide the product into the core accounts, chats, audio/video, contacts, notifications, support, moderation, and monetization. After the design, we can launch the first version without unnecessary magic, otherwise, the budget can easily drift, and I am not a magician, just an architect =)

> Question 1 - do we need both iOS and Android right away, or do we start with one platform?
> Question 2 - do we implement audio/video through a ready-made service like Agora or Twilio, or do we need our own WebRTC server?

> https://business.ingello.com/rapport - a platform with different types of users, cabinets, and sensitive communication scenarios
> https://business.ingello.com/lita-doctor - an example of a system with cabinets, roles, and personal data
> https://business.ingello.com/vorfahr - a SaaS product with atypical logic, payments, and complex product architecture

The main page of Ingello for FLH - https://systems-fl.ingello.com/ua

From you at the start, we need examples of applications, a list of features for the first version, the desired model of VIP advantages, and requirements for user moderation. Then we can provide a working estimate of the stages, not just an approximate one. Expand

Budget: 16999 UAH Deadline: 12 days

In WebRTC applications, the weak point is almost always in signaling and call states: who is calling, who declined, what happened during network loss.

I can assemble the first working release on React Native with Firebase for authentication/data and Node.js for logic, without unnecessary bloat at the start.

I will start with a brief outline of screens and flows, then create basic functionality so it can be installed and tested on a phone.

I see the budget of 10,000 UAH as MVP: first, we fix the core, and secondary things are not included in the first version.

Please write what exactly should be in the first release: rental/object cards, chat, or audio/video call — and I will immediately break it down into stages.

I have my own app and more than one, for example: https://play.google.com/store/apps/details?id=com.aicollage.app Expand

Budget: 10000 UAH Deadline: 1 day

Hello!

We can create a mobile application for communication for this task.

1. What needs to be implemented first: calls, chats, or accounts?
2. Is integration with contacts and technical support needed from the start?

—
About us

We are dZENcode – a full-cycle IT development company: from design and programming to integrations and post-release support of digital solutions. We create projects from scratch, as well as connect to existing solutions that need refinement, development, or technical support.

You can find detailed information about our services and rates on our official website: Freelancehunt

Take a look – after that we can discuss the details and agree on the next step.

⚠️ After clarifying all the details, we will determine the scope of work, the suitable format of cooperation: project-based, outsourcing, or outstaffing – and the final cost.

With us, projects are guaranteed to reach release:
• 10+ years providing IT services;
• 90+ in-house specialists;
• 250+ public reviews since 2015;
• We support products under SLA after launch;
• We work under NDA and contract with the company! Expand

Budget: 15000 UAH Deadline: 12 days

Hello, Oleksandr!

The task description is extensive, but implementing such functionality is entirely possible. The most complex and crucial part here is stable real-time audio/video calls and the logic for instant messaging.

I specialize in developing backend platforms, integrating real-time protocols, and deploying infrastructure. I have specific experience in your stack (Node.js / WebRTC / Socket.io).

How I can assist your project:

Call Implementation (WebRTC): I will set up a signaling server on Node.js + Socket.io for quick client connection (handshake) and launch low-latency P2P audio/video streams. This will allow media traffic to be transmitted directly between users, minimizing the load on your server.

Chat and Authorization Logic: I will implement state persistence, work with rooms/group chats, and secure authentication (including token generation and a base for 2FA).

Deployment: I will fully package the entire backend infrastructure in Docker for stable deployment and easy scaling on the server.

My relevant case:

Anonymous Voice Chat Roulette: I developed a high-performance backend server on Node.js and Express, where I implemented a real-time voice calling system with minimal latency using Socket.io and WebRTC.

I suggest discussing the architecture of the future application in chat. Please let me know if you already have a frontend team (React Native) or if you are looking for a full-stack developer? I would be happy to collaborate! Expand

Budget: 10000 UAH Deadline: 20 days

Good day! Thank you for the detailed description of the idea.

I will be honest right away: I am a beginner in development and am currently actively building my portfolio, so I am willing to take on this project at a reduced price. It is important for me to create a quality case, and for you, this is an opportunity to get development cheaper than with more experienced specialists or studios.
I suggest we first discuss the budget and divide the development into stages. For example, in the first stage, we can create an MVP: registration, user profile, personal and group chats, basic account settings. Then we can gradually add calls, contacts, 2FA, VIP features, technical support, and other capabilities.
I would be happy to discuss the details, your expectations, timelines, and budget to propose a realistic work plan.

Budget: 25000 UAH Deadline: 10 days

Hello, Oleksandr! I am ready to develop a modern, secure, and fast mobile application for communication on iOS and Android.

I have experience in creating real-time systems, so I clearly understand how to implement each feature from your description:

Communication: Chat system on WebSockets (instant delivery) and audio/video calls via WebRTC protocol.

Security: Account binding, reliable data protection, two-factor authentication (2FA), and a blacklist (blocking).

Functionality and VIP: Localization (language change), working with the native phone book for contact synchronization, a custom support module for users, and a flexible VIP benefits system (subscriptions/paid features).

I recommend building the product in stages (through an MVP version) to clearly control the budget and test each build of the application on time.

Preliminary conditions:

Development timeline for the stage: [...] days.

Budget for the stage: [...] UAH (negotiable).

My projects for assessing technical skills:

Web tools with custom logic and event handling: pctest.pp.ua, keytest.pp.ua

Multi-page e-commerce project: mamamia.pp.ua

Full portfolio: Freelancehunt and more information at programist.pp.ua.

Feel free to message me privately; I will ask a few clarifying questions regarding your priorities and calculate an exact action plan! Expand

Budget: 27000 UAH Deadline: 31 days

Hello!
I am a Full-Stack mobile app developer for iOS/Android, working alongside my own UI/UX designer and QA tester 🤝.
We will create your messenger "turnkey" at the highest level.
Chat logic, audio/video calls, 2FA, contact synchronization, and VIP monetization are our specialties.

🚀 Our releases in the App Store and Google Play (including chats):
Eurobus (Chats and tracking)
iOS - https://apps.apple.com/ua/app/eurobus-airchat/id6754097949
Android - https://play.google.com/store/apps/details?id=app.airchat.mobile

BallBob:
iOS - https://apps.apple.com/ca/app/ballbob-play-with-the-ball/id6759486822

Doctor Plus
iOS - https://apps.apple.com/us/app/doctor-plus/id6757864697
Android - https://play.google.com/store/apps/details?id=com.kis.production.DOCTOR

ChatMind
Android - https://play.google.com/store/apps/details?id=com.chatlike.app

I suggest discussing the budget and development stages in detail via DM.
Ready to start! 💬 Expand

Budget: 27000 UAH Deadline: 1 day

Hello! The project is very interesting, but it has its technical nuances.

The scale of development directly depends on your requirements: if you plan a product at the level of Telegram with a high level of security and stable video/audio transmission - this is a serious startup with a budget starting from $5,000 to $10,000. However, if we can start with simplified functionality, we can find other technical solutions to optimize costs.

I work with the Python stack (FastAPI) for the backend, Next.js for the web, and React Native for mobile applications, which allows us to cover all your needs with one specialist.

Let's discuss the details in private messages. Tell me a bit more about your priorities, and I will suggest how to best implement your idea.

Budget: 15000 UAH Deadline: 15 days

Hello! I can implement your PWA application with all the stated features, using modern web technologies (HTML, CSS, JS) for the frontend and Python for the backend, ensuring reliable audio/video call functionality and synchronization. I can also assist with developing VIP benefits and integrating technical support.

Message me, and we can discuss everything in detail, and I can start working right away.

Portfolio: Freelancehunt
Reviews: Freelancehunt

Budget: 27000 UAH Deadline: 1 day

Hello! Please message me privately so I can provide you with consultation regarding this project. I hope for our collaboration!

Budget: 15000 UAH Deadline: 10 days

Alexander, good day!

The project looks interesting. To understand the budget and timelines, I would like to clarify a few key points:

Will this be a public messenger for a wide audience or a solution for a specific community/business?
How many users are planned at the start?
What features are mandatory for the MVP, and what can be implemented later?
Are group audio/video calls needed, and how important is message encryption?
What specific VIP features do you plan for paid users?
Are only mobile applications (iOS/Android) needed, or is a web version also required?

After these clarifications, we will be able to more accurately assess the scope of work and propose the optimal implementation option. I would be happy to discuss the details in chat or on a call. Expand

Budget: 3353 UAH Deadline: 3 days

Hello! The task is very ambitious and interesting; in fact, you are describing the creation of a full-fledged messenger with infrastructure at the level of Telegram or WhatsApp. From a technical point of view, this is a serious product: reliable WebSockets are needed for group chats (to ensure messages are delivered instantly), WebRTC technology with dedicated STUN/TURN servers for audio and video calls, and a proper cloud architecture with encryption for security (2FA, contact synchronization). I fully understand the logic of building such high-load systems. Instead of throwing out random numbers, I propose a professional approach: break the project into stages (MVP). For example, we will first implement the basic architecture, registration, contact synchronization, and text chats, and in subsequent iterations, we will add video calls and VIP monetization (through In-App Purchases). I suggest we chat for 10 minutes: I will ask a few clarifying questions regarding load and design, after which I will create a clear roadmap for you with a realistic budget and timeline range. What do you say?

Budget: 27000 UAH Deadline: 30 days

Hello. We have experience in developing mobile applications and backend systems with authentication, chats, user roles, push notifications, admin panels, and integrations.

I suggest implementing your project in stages: first a stable MVP version, then expanding functionality. In the first stage, we can create registration via email/phone, user profile, personal and group chats, contact synchronization, push notifications, account settings, a list of blocked contacts, technical support, and an admin panel.

Audio/video calls are better implemented through a ready-made RTC service or WebRTC — this separately affects the budget, stability, and support.

Stack: React Native or Flutter for iOS/Android, backend — Node.js/NestJS or Python/FastAPI, PostgreSQL, WebSocket for chats, Firebase/APNS for push notifications, admin panel for managing users, complaints, support, and VIP features.

Portfolio: https://winbixai.com/uk

After launch, we provide 60 days of warranty support for bug fixes within the agreed functionality.

For an accurate estimate, we need to clarify:

1. Do you need iOS and Android at the same time?
2. Is the design already available or does it need to be created from scratch?
3. Are the video calls 1-on-1 or also group calls?
4. What specific VIP features are planned?
5. Is message encryption required?
6. What is the expected user volume at launch?

After receiving the answers, we can propose a budget, timelines, and implementation stages. Expand

Budget: 27000 UAH Deadline: 75 days

We already have a practically ready database for such an application, which can be quickly adapted to your logic and launch the first working phase. ))

Regarding the budget - I would estimate starting from 360,000 UAH for the first full version with chats, accounts, notifications, 2FA, basic technical support, VIP logic, and integration of audio/video calls through the existing server infrastructure.

Timeline - approximately 10-11 weeks, if we avoid unnecessary complications at the start.

If we are to create a more in-depth social platform with moderation, complex monetization, call history, admin panel, analytics, and scaling for high load - it’s better to divide the estimate into a design phase and development.

> First, we create the application structure, registration scenarios, chats, calls, contacts, blocking, and VIP advantages.
> Then we assemble the mobile application, server part, admin panel, and support system.
> Separately, we can add AI moderation of messages, automatic responses from technical support, and tips for users - this can be kept simple, but the benefits will be noticeable.

I’ll clarify 2 points to avoid guessing:

> Is the application needed for both iOS and Android at once, or can the first launch be on one platform?
> Should VIP advantages be through subscription, one-time payment, or internal balance?

Examples of similar experience:
> https://business.ingello.com/fractal - complex AI/SaaS systems with agent logic and automation.
> https://business.ingello.com/platforma - corporate platform with cabinets, roles, processes, and admin part.
> https://business.ingello.com/vorfahr - product system with automation, integrations, and development for the business model.

Main page of Ingello for the exchange:
> https://systems-fl.ingello.com/ua

In touch, we can discuss the composition of the first phase right here on the exchange. Expand

Budget: 14000 UAH Deadline: 3 days

I have done similar projects: messengers with real-time chat, calls via WebRTC, and push notifications. Technically, this involves a backend with sockets, a media server for audio/video, integration with the address book through native permissions, and standard authorization with 2FA. Everything is feasible; the question is how detailed you want to start: an MVP with chat and calls or a full set of features right away. Please let me know which platforms the application should be for, both iOS and Android or just one? I am ready to discuss the scope and break it down into stages.

Budget: 5000 UAH Deadline: 7 days

Good day, I have extensive experience with rmtp, webrtc, and in application development. Let's discuss the project and budget. I can do the design myself :)

Budget: 4999 UAH Deadline: 7 days

Hello, I can create an Android app for you. If needed, I can also create a design for the MVP, which will then be easy to scale and improve.

Budget: 27000 UAH Deadline: 50 days

Hello!

My name is Danilo Minyaylo. I am interested in your project as it is a full-fledged mobile application for communication, not just a chat. It is important to carefully consider the architecture from the very beginning: authorization, contacts, private and group chats, audio/video calls, notifications, account security, VIP features, and technical support.

I can help with the development of the Android and iOS application using Flutter.

Here’s how I see the main functionality:

1. User Account
- registration via phone number or email;
- email/phone confirmation;
- 2FA;
- profile settings: nickname, phone number, date of birth, avatar;
- change application language;
- privacy settings;
- list of blocked contacts.

2. Chats
- private 1-on-1 chats;
- group chats;
- sending text messages;
- sending photos, videos, documents;
- message statuses: sent / delivered / read;
- message history;
- search in chats.

3. Calls
- audio calls;
- video calls;
- accept/reject call;
- call history;
- push notifications for incoming calls.

4. Contacts
- synchronization with phone contacts;
- search users by number;
- adding contacts;
- blocking users.

5. Notifications
- push notifications for new messages;
- notification settings;
- mute sound for specific chats;
- call notifications.

6. Technical Support
- separate chat with support;
- creating a request;
- request status;
- request history.

7. VIP Features
Can include, for example:
- VIP badge in profile;
- advanced privacy settings;
- increased group participant limit;
- priority technical support;
- extended file storage;
- custom themes;
- ability to hide online status;
- additional reactions/stickers.

Technically, I would suggest the following stack:
- Flutter / Dart for Android and iOS;
- backend on Node.js or Python;
- PostgreSQL or Firebase/Supabase;
- WebSocket for real-time chat;
- Firebase Cloud Messaging for push notifications;
- WebRTC or Agora for audio/video calls;
- Cloud Storage for files;
- JWT/Auth or Firebase Auth for authorization;
- a separate admin panel for technical support and user management.

I would recommend doing the project in stages:

Stage 1 — MVP:
- registration;
- profile;
- private chats;
- group chats;
- push notifications;
- contacts;
- blocking users;
- basic settings.

Stage 2:
- audio/video calls;
- technical support;
- advanced account settings;
- multimedia and files.

Stage 3:
- VIP features;
- monetization;
- admin panel;
- optimization. Expand

Budget: 20000 UAH Deadline: 30 days

Hello!

I have reviewed your task - an interesting project, and I have the necessary experience to implement it.

I specialize in developing mobile applications for iOS and Android, having worked on projects of various scales: from MVPs to full-fledged products with complex architecture.

Regarding your application - I see a clear stack: React Native for cross-platform mobile, WebRTC for audio/video calls, WebSocket for real-time chats, Firebase or custom JWT for authentication with 2FA and phone number binding. Contact synchronization, push notifications, multilingual support, VIP levels - all of these are standard solutions within one stack.

I can take on either the full development cycle (mobile + backend) or individual modules if you already have a team.

Budget: 27000 UAH Deadline: 15 days

Good day! I develop in Python, have worked on similar projects with React/Node.js, and am ready for collaboration.

Budget: 15000 UAH Deadline: 3 days

Hello! I have it ready, I will install it on your server and on your devices and configure it.

Budget: 27000 UAH Deadline: 30 days

Hello. I work with React Native. Do you have a ready design for the application?

Budget: 27000 UAH Deadline: 1 day

Hello, I have experience in application development from idea to publication.
Feel free to message me privately.
I would be happy to help you!

Budget: 27000 UAH Deadline: 27 days

Good day.
I am a mobile application developer with over 10 years of experience.
I have experience in creating messengers.
To discuss the cost of the application, it is necessary to create a technical specification. The list of features you mentioned is just the tip of the iceberg.
First, we need to clarify whether you want the application for iOS/Android or a cross-platform solution using React or Flutter.
Secondly, who is this application intended for: regular users or others, such as for personal use/internal use (for example, in a group or company)?
Thirdly, will it be a regular messenger with its own centralized backend server, or will it operate through P2P?
And what is the budget for development, because a messenger as such is a very abstract concept, and based on that, we can assume what your MVP might look like.
Please write to me privately; I would be happy to discuss and collaborate.
Thank you for your attention.

Budget: 18000 UAH Deadline: 5 days

Hello. I am ready to complete the project turn-key, guaranteeing quality and promptness.

Feel free to message me, I would be happy to collaborate!

Budget: 1000 UAH Deadline: 1 day

Good day
I have extensive experience in software development.
I can develop the entire backend and frontend infrastructure for such applications.
Write to me
(Timeline and budget in private message)

Budget: 27000 UAH Deadline: 30 days

Good day!

The Benefit Studio team has experience in developing mobile applications, messengers, SaaS platforms, and real-time systems.

We can implement:

• Personal and group chats
• Audio and video calls (1-to-1 and group)
• Synchronization of phone contacts
• Registration via email and phone number
• Two-factor authentication (2FA)
• Profile and account settings
• Push notifications and management
• Multilingual application support
• Blocked users list
• Technical support system
• VIP subscriptions and premium features
• Admin panel for managing users and content

For such a project, we recommend Flutter or React Native for iOS and Android with a single codebase, as well as a scalable backend on Node.js/NestJS.

We are ready to assist with architecture, security, technology selection, and phased implementation of the MVP with further scaling.

Best regards,
The Benefit Studio Team Expand

Budget: 1111 UAH Deadline: 1 day

Good night, let's discuss in more detail. Do you have a more detailed description of the application, design, backend?

Budget: 27000 UAH Deadline: 50 days

Good day.

I am ready to take on the development of a mobile application for communication. The project is quite complex, so I suggest implementing it in stages: first an MVP with core functionality, followed by expansions and additional features.

I can implement:

— user registration and authorization;
— linking email and phone number;
— profile settings: nickname, phone, date of birth;
— personal and group chats;
— synchronization with phone contacts;
— audio and video calls via WebRTC or a third-party service;
— push notifications and their settings;
— changing the application language;
— a list of blocked contacts;
— basic 2FA;
— a tech support section;
— VIP features and restrictions for regular users;
— backend, database, and API for the mobile application.

For implementation, React Native / Flutter can be used for the mobile application and Node.js / Python for the server side. For calls, it’s better to discuss the implementation option separately: a custom WebRTC architecture or integration of a ready-made service, as this significantly affects the budget and timelines.

I will be able to accurately estimate the approximate budget and final deadline after clarifying:
— whether Android and iOS are needed at the same time;
— whether an admin panel is required;
— what specific functionality should be in VIP;
— whether real-time messaging is needed;
— which option for video/audio calls we choose.

I am ready to discuss the details, propose an architecture, and break the project into stages to first launch a working MVP version and then gradually add extended functionality. Expand

Budget: 25000 UAH Deadline: 60 days

We have experience in developing messengers with WebRTC support for audio and video communication. We implement architecture with contact synchronization, two-factor authentication, and a flexible notification system. We will ensure stable backend operation and cross-platform performance of the application. We are ready to discuss the details of functionality implementation and service integration.