Flutter ASTPP Dialer App

@hirujiyu

➰➰ EXPERIENCED FLUTTER & VoIP APP DEVELOPER | SIP, ASTPP & STRIPE | 8+ YEARS Hi there, Yes, I do have experience with Flutter, SIP/VoIP integrations, payment gateways, and telecom-related applications. I can build a single Flutter codebase for iOS and Android that provides a seamless calling-card experience while integrating securely with ASTPP for balance management, billing, and call routing. ⭕ Which ASTPP APIs are currently available for balance lookup, recharge processing, and account management? ⭕ Do you require call recording, call logs synchronization, or only standard outbound calling for the MVP? ⭕ Will users have a dedicated SIP account per customer, or will credentials be provisioned dynamically from ASTPP? ⚡ For this type of application, I would focus heavily on SIP stability, background call handling, VoIP push notifications, and seamless balance synchronization to ensure a smooth user experience on both iOS and Android. ➰ Let's discuss your ASTPP setup, API availability, and calling workflow so I can propose the best architecture and timeline. Thank you.

@ominfowave

Hello We are Ominfowave Software Services Pvt. Ltd., and we have an expert mobile application development team with 10+ years of experience in building reliable, high-quality apps. ? Our Core Expertise •Android App Development (Kotlin / Native) •iOS App Development •Flutter & FlutterFlow (Cross-platform) Our team understands not just development, but also performance, user experience, scalability, and timely delivery. ? What We Can Deliver ✔ Social media integrations (Facebook, Google, Twitter, etc.) ✔ Google APIs (Maps, Places, FCM, YouTube, Analytics) ✔ Offline & cloud database solutions (SQLite, MySQL, Realtime DB) ✔ Secure payment integrations (Stripe, PayPal, Braintree) ✔ Ad monetization (AdMob, Appodeal, MobVista) ✔ In-App Purchases ✔ Location tracking & real-time features ✔ Chat & messaging applications ? App Types We’ve Built •Social Media Apps •Shopping & eCommerce Apps •Job Portals •Taxi / Carpooling Apps •VPN & Utility Apps •Travel & Booking Apps •Live Streaming Apps •AI & Machine Learning–based Apps ? Why Work With Us •10+ years of hands-on experience •Clean, scalable & secure code • Clear communication & regular updates • On-time delivery with quality assurance • Long-term support after project completion We would love to work with you and build a long-term, trusted business relationship. Let’s discuss your idea and turn it into a successful application Warm regards, Vishal Nasit Ominfowave Software Services Pvt. Ltd.

@corpmember29

I am a full-stack developer with 10+ years of experience in mobile and backend systems, and I have carefully reviewed your requirement for a Flutter-based ASTPP dialer application. I understand you need a single Flutter codebase that runs on both iOS and Android, functioning as a softphone integrated with ASTPP. The app should support phone number OTP authentication with persistent login, display real-time prepaid balance from ASTPP, enable instant Stripe-based top-ups, and allow outbound SIP calling through a reliable SIP stack. It should also include a clean dialer UI, call history, payment history, and contacts, with secure backend integration for balance updates and webhook-based crediting. I will build this using Flutter (Dart) with a modular architecture. SIP functionality will be implemented using a stable SIP library (such as pjsip-based integration or dart-sip-ua depending on compatibility), with proper handling for background/foreground states and iOS VoIP push notifications. Authentication will be OTP-based with secure token storage for persistent sessions. Stripe integration will be implemented with server-side webhook validation to ensure instant and secure balance updates in ASTPP. I HAVE 10+ YEARS OF EXPERIENCE IN REQUIRED TECHNOLOGY AND FULL-STACK DEVELOPMENT. I WILL PROVIDE 2 YEAR FREE ONGING SUPPORT AND COMPLETE SOURC CODE, I eagerly await your positive response. Thanks.

@diektech

Hi — Elias here from Miami. I see you're looking to create a Flutter ASTPP Dialer app that works seamlessly on both iOS and Android. Achieving this involves more than just a single code base; it’s about ensuring performance, reliability, and effective user interactions. What usually matters most here is the integration with VoIP and SIP protocols, especially under varying network conditions. A common issue is maintaining call quality while managing resource-heavy features. The tricky part is ensuring that the app handles dynamic permissions and user roles effectively in a VoIP context. My approach would be to structure the app around a robust state management system, ensuring a smooth user experience despite backend challenges. I prioritize maintainability, so future updates or feature expansions can be implemented easily. I've worked on similar mobile applications that required complex integrations and have a strong foundation in Flutter, Dart, and VoIP technologies. A few questions to better understand the scope: Q1 – What specific SIP features do you want to prioritize for the initial release? Q2 – How do you envision user authentication and permissions being managed? Q3 – Are there any third-party services or APIs you plan to integrate for payment processing? Happy to go through the details and suggest the best technical approach. Looking forward to hearing from you.

@Dreamappsolution

Hi sir, I read your project description .I can do your project & able to run successfully. I have 8+ years experience for website & mobile application development also done over 400+ project by a good team members . It will be very much pleasure for me, if you give me the opportunity to do your job for minimum cost. Thanks for your consideration . Thanks with Regards Prosanto

@shubhamshrimal7

Hello, Greetings Hope you are doing well. I am a Mobile Application developer with over 5 years of experience. I am confident in my ability and skills to develop high-quality Mobile apps and would like to work on your dialer app project. I will complete the work as per your requirements. I want to discuss more this project to prepare the final concept. So let’s discuss this in detail over chat then will make plans to start work on it. Waiting for your earliest reply. Thanks. Shubham

@joomextensions

I specialize in Flutter and have experience integrating SIP stacks (dart-sip-ua/pjsip) for VoIP applications. I'll build your ASTPP calling-card dialer with a single Flutter codebase for iOS and Android. Features: OTP-based login with persistent session, home screen balance display pulled from ASTPP APIs, Stripe card tokenization with server-side webhook to instantly credit ASTPP balance, outbound SIP calling with background/foreground handling, Apple VoIP push (CallKit) on iOS, and a clean dial-pad UI with call & payment history. I'll deliver signed APK, TestFlight-ready IPA, full source code, and deployment docs. Happy to clarify SIP credential provisioning and incoming call scope before starting. Regards, Harsh Thoriya

@C0RETECHIES

Hello, The success of this project depends on three areas working reliably together: ASTPP balance synchronization, SIP calling stability across iOS and Android, and instant account crediting after Stripe top-ups. We've built communication and real-time platforms including SecureCom, along with Flutter-based mobile applications where authentication, secure data handling, and backend integrations are critical to the user experience. For your dialer, I would use a single Flutter codebase with persistent OTP authentication, ASTPP balance integration, Stripe top-ups with webhook-driven balance updates, and a SIP layer built around a proven library such as PJSIP or dart-sip-ua. Special attention will be given to background calling behavior, iOS VoIP push notifications, and session persistence so users remain authenticated without repeated logins. The goal is a lightweight calling-card application that feels simple for the user while maintaining reliable balance management and calling functionality behind the scenes. Best, Raksha

@rahuliitm69

Hi there, I got the whole idea. Since the app revolves around ASTPP balance management, SIP calling, and instant top-ups, getting the flow between authentication, billing, and calling right is the most critical part of the build. My approach would be to first connect the app with ASTPP for user authentication and balance retrieval, then implement the Stripe recharge flow so balances update automatically after successful payments. Once that foundation is stable, I would integrate SIP calling and focus on call reliability, background handling, and a smooth user experience across both iOS and Android. For the tech stack, Flutter is definitely a strong option for maintaining a single codebase, but I would prefer finalizing the complete architecture after reviewing your ASTPP setup and SIP requirements. I have a few questions around ASTPP APIs and SIP provisioning, and would request to connect once so we can review those details and move forward with the best approach. Thanks, Rahul A.

@kamran2012

Interesting project, I will deliver the Flutter dialer app — SIP calling via ASTPP, phone-number OTP auth with persistent sessions, Stripe card tokenization, and the balance/top-up flow — compiled for both iOS and Android from a single codebase. For the SIP stack, I will integrate flutter_pjsip with a CallKit integration on iOS so VoIP push notifications wake the app reliably even when terminated. On Android, a foreground service will keep the SIP registration alive without excessive battery drain. Questions: 1) Which ASTPP version are you running, and do you already have REST API endpoints exposed for balance queries and account crediting? 2) For Stripe, should tokenization happen entirely client-side with a server-side PaymentIntent, or do you have an existing backend handling webhooks? Looking forward to talking through the details. Kamran

@Herculesz

Hi I can build your Flutter soft-phone app for iOS and Android with phone-number authentication, persistent login, ASTPP balance display, Stripe top-ups, SIP calling, contacts, and call/payment history. The main technical challenge is making SIP calling reliable across foreground/background states while keeping ASTPP balance updates, Stripe payments, and account crediting secure and synchronized. I would solve this with a Flutter codebase, secure backend middleware, ASTPP API integration, Stripe tokenized payments, webhook-based balance crediting, and a SIP stack such as pjsip or dart-sip-ua. I can implement OTP login, saved sessions, prepaid balance retrieval, dial pad, contacts access, outbound SIP registration/calling, call logs, payment history, and refreshed balance after top-up. For iOS, I can handle VoIP push notification requirements and app lifecycle behavior as cleanly as Apple permits. For Android, I can configure foreground service/background handling for more reliable call behavior. The final handoff will include source code, setup documentation, build instructions, signed APK, and TestFlight-ready iOS build support. Thanks, Hercules

@mrresearcher99

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

@InterconnectBPO

I specialize in developing custom Flutter applications to meet clients' unique requirements. With our expertise, we can help you achieve your goal of creating a seamless soft-phone app for your ASTPP switch. I understand the importance of features like secure phone-number authentication, SIP integration, and payment processing. Building with Flutter ensures future updates are streamlined across platforms, while integrating SIP stack and payment gateways like Stripe will provide a smooth user experience. Our team has 20+ 5-star reviews on similar projects, showcasing our proficiency in delivering high-quality solutions. The worst that can happen is you walk away with a free consultation! Regards, InterconnectBPO

@point2solutions

⭕⭕⭕Flutter Softphone App for ASTPP with SIP Calling & Stripe Top-Up⭕⭕⭕ Hello, I'll develop a single Flutter codebase for iOS and Android that integrates seamlessly with your ASTPP platform, providing persistent phone-number authentication, real-time balance management, Stripe-powered top-ups, and reliable SIP calling with full background and VoIP notification support. Key Features Cross-Platform Flutter Development, ASTPP Balance & Account Integration, SIP Calling (PJSIP/Dart SIP UA), Persistent OTP Authentication, Stripe Payment Integration & Webhooks, Call & Payment History, Contacts & Dial Pad, iOS VoIP Push Notifications, APK & TestFlight-Ready Build Delivery READY TO START WORK IMMEDIATELY!!!!! Thanks

@nikhilgarg96

Hello Greetings, After reviewing your project description, I feel confident and excited to work on this project for you. But I have some crucial things and queries to clear up. Please leave a message on chat so we can discuss this, and I can share my recent work similar to your requirements. Thanks for your time! I look forward to hearing from you soon. Best Regards.

@temoberishvili

Hello! It sounds like you're looking for a Flutter-based mobile app that works seamlessly on both iOS and Android. To achieve this, I would focus on using a single codebase that efficiently handles VoIP functionalities, possibly integrating SIP for your calling features. Implementing payment processing with Stripe would also be on my radar to ensure smooth transactions within the app. I'd start by setting up the Flutter environment and then move to create the essential UI components while integrating the VoIP functionalities and payment options. Q1: Are there specific SIP services or providers you want to integrate? Q2: Do you have any design preferences or existing branding guidelines for the app? Q3: What features do you prioritize for the initial launch versus future updates? Let’s make this happen.

@doomshellsl

Hi Jacques, We’d be excited to help create the next-generation ArchiWorld platform and translate its 25-year reputation into a digital experience that feels as refined, curated, and exclusive as the architectural projects it represents. What stood out most in your brief is that ArchiWorld is not a conventional directory or media website. The challenge is to create a platform that behaves more like a premium architecture publication—where exceptional projects, editorial content, and carefully selected partners are presented with elegance, restraint, and purpose. Our approach would focus on a clean editorial design language with generous white space, large-format imagery, sophisticated typography, and intuitive navigation. We would recommend a CMS-driven architecture that allows your team to independently manage projects, magazine editions, partners, events, and content while maintaining a consistent high-end presentation throughout the site. A few questions: • Do you already have brand guidelines, typography specifications, and image standards available? We look forward to discussing ArchiWorld in greater detail and helping create a digital presence that reflects the prestige and international standing of the brand. Best regards,

@shakeebsun

Hi, This project is a great fit for my Flutter experience. I understand the workflow: OTP authentication, ASTPP balance lookup, Stripe top-ups, and SIP-based calling from a single Flutter codebase for iOS and Android. I can build: • Persistent phone-number authentication • Balance display from ASTPP • Stripe payment integration • SIP calling using a reliable Flutter SIP stack • Call history, payment history, and contacts • TestFlight-ready iOS build and Android APK A couple of questions: 1. Does ASTPP already expose APIs for balance, recharge crediting, and call history? 2. Will SIP credentials be generated by ASTPP automatically for each user? The most critical part of this project is the SIP integration and iOS VoIP notifications, and I'd be happy to discuss the best approach before development begins. Looking forward to hearing from you.

@rbtech1984

Hello There!!! ★★★★ (Flutter ASTPP SIP Dialer App – VoIP + Stripe + OTP authentication) Project understanding: I understand you need a single Flutter app for iOS and Android that works as a SIP softphone connected to ASTPP. It includes OTP login, persistent session, balance display, Stripe top-ups, and outbound calling via SIP integration. Services: ⚜ Flutter cross-platform app development (iOS & Android) ⚜ SIP integration (pjsip / dart-sip-ua) for calling system ⚜ ASTPP API integration for balance & call management ⚜ Stripe payment gateway with webhook crediting ⚜ OTP / phone authentication with persistent login ⚜ Clean UI (dial pad, balance, call history, contacts) ⚜ Push notifications + background call handling setup I have experience building Flutter apps with API integration and real-time systems, including payment flows and VoIP related modules. I usually structure networking layer carefully, sometimes I over-test SIP connections but it helps stability :) I can deliver full source code, build files, and deployment support for both stores. Warm Regards, Farhin B.