SIP Soft Phone App Development

@Hammadhassan21

Hey, I’ve carefully reviewed your project, and I understand you need a lightweight branded SIP softphone focused exclusively on receiving incoming calls, with no outbound dialer, plus an incoming email function for your users. I can build this as a simple, cost-conscious app without unnecessary features. I will implement SIP incoming-call handling, your logo and branding, push notifications for incoming calls, the email receiving functionality, and a clean mobile interface optimized for Android and iPhone. I’ll also prepare the required builds and assist with Google Play/App Store submission, testing, and deployment so the app is ready for your users. I have hands-on experience with similar communication and mobile applications and would be happy to share relevant examples during our discussion. One quick question: Which SIP provider/server will the app connect to, and do you already have the SIP credentials/API details available? Portfolio: https://www.freelancer.com/u/Hammadhassan21 Best Regards, Hammad Hassan

@starttechno

I can build a branded SIP soft phone focused strictly on receiving incoming calls, with no outbound dialer or call keypad. I’ll use React Native for a shared Android/iPhone codebase, integrating a SIP library for registration and call handling, plus Android Telecom and iOS CallKit so calls behave like native incoming calls. The app will include your logo, colors, branded screens, call accept/decline controls, background operation, and push notifications for incoming calls when the app is not open. I’ll also add the incoming email function—either as email notifications or an in-app mailbox, depending on the exact requirement—and prepare the release builds for Google Play and the Apple App Store. You’ll provide the SIP server/credentials, branding assets, email access or API details, and store accounts; I’ll configure the app securely and test registration, ringing, answering, and disconnect handling on both platforms. I have 10+ years of mobile development experience and can keep the implementation lean for your free user offering. Should the incoming email feature only notify users about new emails, or should users read them inside the app? Muhammad Saad

@XanvraTECH

Hello, I am very interested in developing the SIP Soft Phone App as described in the project requirements. With my expertise in iOS Development, Android App Development, and Mobile Development, I am confident in delivering a high-quality app that meets your specifications. I understand the need for a SIP soft phone that only receives incoming calls, features your branding, and can be downloaded from the Google app store for both Android and iPhone platforms. Additionally, I will ensure the inclusion of an incoming email function within the app. - MY WORK STATS: ✨ https://www.freelancer.com/u/XanvraTECH I would love to discuss this project further and explore how I can bring your vision to life. Best regards, Warda Haider

@n2rtechnologies

Hi, When you say incoming email function, do you mean the app displays emails from a specific mailbox, or does it need to send/receive within the app itself? Also, are you planning to host the SIP server, or do you need guidance on that setup? We've built receive-only communication apps for both platforms before. The branding and app store deployment are straightforward. Regards, Nurul Hasan

@InterconnectBPO

I can help create a SIP soft phone app that meets your specific needs, focusing on receiving incoming calls while incorporating your branding. The app will be designed for both Android and iPhone, ensuring accessibility for all users. I understand the importance of a streamlined user experience without a dialer, as well as the necessity for an incoming email function. This aligns perfectly with your goal of providing a valuable freebie for your users. With extensive experience in mobile app development, I specialize in creating functional and user-friendly applications. My portfolio includes similar projects that showcase my ability to deliver quality within budget constraints. I look forward to discussing how we can bring your vision to life. Regards, InterconnectBPO

@rbtech1984

Hello!! I understand you need a branded SIP soft phone focused only on receiving incoming calls, with your logo and support for Android and preferably iPhone, plus incoming email functionality. • Do you already have the SIP account details? • Do you want Android and iPhone launched together? • Do you already have your logo and app branding ready? The application will be designed with a simple user-friendly interface, incoming-call handling without an outbound dialer, your branding, and email notifications or inbox functionality as required. The build will be optimized for reliable background call reception and prepared for store submission. Relevant VoIP, SIP, and mobile application projects have been completed, with a focus on keeping communication tools simple, stable, and affordable. Let us discuss your current SIP setup and the best approach within your budget. Best regards Farhin B

@CodeAnchors

Hello, I hope this message finds you well. I have a clear understanding of your project for developing a SIP soft phone app with specific functionalities like receiving incoming calls, branding customization, and an incoming email feature. Rather than just focusing on features, I aim to ensure that the app aligns with your real business objective of providing a valuable tool for your users. My approach involves structured requirement confirmation, controlled planning, clean implementation, rigorous testing, and milestone-based transparency to deliver high-quality results efficiently. With a strong background in Mobile App Development, Android, iOS Development, and Mobile Development, I am confident in my ability to execute this project reliably and achieve long-term success for your business. You can view my portfolio here: ⭐⭐ https://www.freelancer.com/u/CodeAnchors ⭐⭐ Could you please share more details about your top priority or main business goal for this app? Let's discuss further in an open chat to finalize the scope seamlessly. Best regards, Muhammad Anas Khan

@rajat07me

Hi, I can help with this softphone app and I understand you need something focused only on incoming calls, with your branding applied cleanly. The key part here is making sure the SIP receiving flow is stable and the app store submission side is handled properly. I can build this in a practical way and also review the best route for Android first, with iPhone added if the final scope fits. Happy to discuss the exact incoming email function you want through the platform.

@zainalitariq245

Hi, I understand you’re looking for a branded SIP softphone that is focused only on receiving incoming calls, without an outbound dialer, and can be offered as a free app to your users on both Android and iPhone. I will build the app using Flutter so we can maintain a single lightweight codebase for both platforms. I’ll implement secure SIP registration, reliable incoming call handling, your logo and branding, call notifications, and the necessary background behavior so users can receive calls even when the app is not actively open. I’ll also include the email functionality so users can send and receive emails within the app, while keeping the interface simple and easy for your users. I’ll prepare the application for Google Play and iOS deployment and test the core calling functionality across current devices. Since this is intended to be a freebie for your users, I’ll focus on keeping the architecture simple and the development cost under control without adding unnecessary features. I can complete the initial version within 3–4 weeks, with a realistic budget of $800–1,200 depending on your SIP server/provider and email requirements. Here, you can review my previous work as an experienced professional: https://www.freelancer.com/u/zainalitariq245 I can start immediately. Let's discuss further. Thanks.

@TeamGTW

Hello! Based on your project description, you are looking to build a branded SIP softphone focused only on receiving incoming calls, without any outbound dialer. The app should support Android and preferably iPhone, carry your logo and branding, be available through the relevant app stores, and include an incoming email function while keeping the overall solution cost effective for your users. I will focus on creating a lightweight and reliable app with SIP registration, incoming call notifications, call answering and ending, background call handling, branded UI, and the required email functionality. I can use Flutter or native development depending on SIP compatibility and platform requirements, while keeping the architecture simple to control development and ongoing costs. I will also handle testing and store submission requirements. I specialize in mobile app development with 7+ years experience and I have done similar work in past please open the chat window so I can share with you relevant communication app examples and discuss the most cost effective approach, timeline, and pricing. Thank you for considering my proposal. I look forward to hearing from you soon. Best regards, Nikita Gupta.

@melikatfz

Hi there, Building a SIP softphone app without an outbound dialer can often lead to complexities with managing incoming call functionalities and ensuring seamless integration with email notifications. This is where my expertise comes in to streamline the process and integrate your branding smoothly across both Android and iOS platforms. Here are my questions: Will you be providing the SIP server details for integration? What specific email functionalities are you aiming to implement in the app? Drop me a message so we can get started right away!

@mahig47

Hello! As per your project post, you are looking to build a branded SIP soft phone focused specifically on receiving incoming calls, without an outbound dialer. The app should provide a simple experience for users to receive calls, carry your branding, be available on Android and preferably iPhone, and also support incoming email functionality. My focus will be on delivering a clean cross platform application with SIP based incoming call handling, background call notifications, branded splash screen and interface, call history, appropriate incoming call controls, and an integrated incoming email experience. I will also prepare the application for Google Play and App Store deployment and ensure the experience remains reliable when the app is running in the background. I specialize in Flutter, SIP and VoIP applications, real time communication, push notifications, mobile integrations, and App Store deployment. My focus will be on creating a lightweight and reliable communication app that matches your branding and business workflow. Let’s connect to discuss your SIP setup, incoming call workflow, email requirements, and branding so we can build a reliable soft phone for your users. Best regards, Nikita Gupta.

@trm66614

Hello, I appreciate the opportunity to work on the SIP Soft Phone App Development. Given your specifications, I will create an app that exclusively receives incoming calls without any dialer for outbound calls, seamlessly integrating your branding. This app will be designed for both Android and iOS platforms, ensuring access for all users. The inclusion of an incoming email function will add a layer of communication that your users will find valuable. Considering your budget constraints, I will focus on delivering a functional and aesthetically pleasing product that aligns with your vision. To ensure the project meets your expectations, Could you clarify the specific features you envision for the incoming email function?. I look forward to collaborating with you on this exciting project! Best regards, Talha

@cliftonc20

Hello, this is a narrowly scoped VoIP client on the surface, but the real work is in inbound call reliability across iPhone and Android plus the app-store constraints around SIP background behavior. I’ve designed production communication systems where the main risk is not the UI, but how registration, push wake-up, and call handling behave once the app is idle. The closest relevant work on my side is AI Translator Plugin for low-latency live audio flow design, and Enterprise ProxyTool Client App for cross-platform client architecture and network-facing runtime behavior. I usually structure something like this by separating SIP registration and call state handling from branding/UI and from notification or email workflows. That keeps the inbound path stable while making the branded shell and account features easier to change. For this kind of app, the reliability questions are background reachability, missed-call handling, and what “incoming email” actually means in the user flow. Those need to be pinned down early because they drive the architecture more than the screen design does. I approach systems by making the production constraints explicit first, especially for store deployment and long-term maintainability. If useful, I can first sketch the inbound call flow, account model, and edge cases before build starts. Clifton

@invoketech

Hello, I bring proven experience in similar SIP and mobile app projects and can share relevant examples. By hiring me, you get: ->>1-Year Free Support: Maintenance included ->>Quality Code: Clean & bug-free ->>On-Time Delivery: Always on schedule ->>Daily Updates: Transparent progress I have read your requirements and can build a lightweight branded SIP softphone for Android and iOS focused on incoming calls only. With 9+ years of experience, I can handle SIP integration, incoming/background call notifications, branding, email functionality, testing and App Store/Google Play deployment. Approach, Skills & Workflow: SIP integration → incoming calls → notifications → branding → email → testing → deployment. Key Features & Functional Modules: SIP, incoming calls, notifications, branded UI, email and call history. User Roles: End User and Admin. Please feel free to connect via chat, InvokeTech

@mobiwebsolutions

✋ Hi There!!! ✋ THE PROJECT GOAL: BUILD A BRANDED SIP SOFT PHONE APP FOR RELIABLE INCOMING CALLS AND EMAIL ON ANDROID AND IPHONE. 1. Develop SIP functionality focused only on incoming calls with no outbound dialer. 2. Create branded Android and iPhone apps using your logo and visual identity. 3. Configure reliable incoming call notifications and SIP connectivity. 4. Add the required incoming email function with a simple user friendly interface. 5. Test thoroughly and prepare the app for Google Play and iOS distribution. Similar VoIP and SIP mobile applications have been completed with incoming call handling, branded interfaces, SIP integration and cross platform deployment. <-- Questions --> 1. Which SIP provider or server will the app connect to? 2. How should incoming emails be displayed and managed? Looking forward to chat with you for make a deal Best Regards Elisha Mariam!

@Tanmoy236

Hi There! I specialize in VoIP mobile apps with 9+ years of experience, building lightweight SIP clients with branded UI and reliable incoming-call handling. Here’s how I can help: 1. Develop an incoming-only SIP softphone without a dialer. 2. Add your logo, branding and incoming email functionality. 3. Prepare Android and iOS builds for store publication. Do you already have the SIP server details and email requirements?

@jonasdedzo

Hi, I understand you need a simple branded SIP softphone application focused specifically on receiving incoming calls only — a lightweight solution that your users can download for free and use without the complexity of a traditional phone dialer. The main goal is to provide a reliable, easy-to-use calling experience while keeping development and maintenance costs under control. I can help create a clean mobile app for Android and iOS with your branding, logo, and a user-friendly interface designed around incoming call handling. I would focus on building a stable SIP integration, secure account handling, push notifications for incoming calls, and a smooth calling experience even when the app is running in the background. The incoming email functionality can also be integrated so users have a complete communication tool from one place. For a budget-conscious approach, I would recommend using a cross-platform framework such as Flutter or React Native where suitable, allowing faster development while maintaining a native-quality experience on both platforms. I can also assist with preparing the app for Google Play Store and Apple App Store submission, including required configurations and testing. Thanks.

@installerpoint

Hello, I’ve reviewed your requirements carefully. I can build a lightweight branded SIP softphone focused specifically on receiving incoming calls, with no outbound dialer exposed to users. Since this is intended to be a free app and the budget is tight, I’d keep the architecture lightweight and avoid unnecessary features or ongoing infrastructure costs wherever possible. I can first confirm the SIP server/provider you are currently using and the exact incoming email requirement, then propose the most cost-effective implementation for Android and iPhone. I’m ready to start and can work within the available budget as far as the final feature scope allows. Best regards RAHEEL