Add Authentication and In-App Purchases

@crtvecode

1) How do you currently manage user sessions, and will the new authentication implementation require any changes to the existing session handling? 2) Are there specific store guidelines for consumables and subscriptions that you would like me to adhere to, or should I follow the general guidelines provided by Apple and Google? 3) What is the expected flow for purchase verification on the backend, and do you have an existing structure in place for this, or will we need to create a new one? I can provide feedback and iterations within 12 to 24 hours to keep the project moving smoothly. As a first deliverable, I can have a working prototype of the authentication feature ready within 3 days. Please feel free to message me to discuss the direction further and get started. Best, Rajavel

@Proswift

Hi, You need email/password auth (sign-up, login, forgot password, token sessions) and a working in-app purchase flow with store receipt validation — added to your existing cross-platform app without breaking what’s already live. I work with Firebase Auth / similar auth services and StoreKit + Google Play Billing for consumables and subscriptions, including server-side receipt checks. I’ve shipped production apps with auth and store releases on both platforms. Once I have repo access, I’ll wire both features, share a short test walk-through, and deliver test builds for Android and iOS. ₹750/hr — happy to start with auth first, then IAP. Best regards

@technologiesit

What's up! I'm Vimal Kumar, a results-driven Full Stack Developer and AI Solutions Expert. With over 8 years of experience and 200+ successfully delivered projects, I have all the building blocks in place to help take your mobile app to the next level. My specialty is turning ideas into powerful digital products and weaving smart solutions that boost revenue and user management - just what you're looking for! Your project aligns perfectly with my expertise as I've worked extensively with cross-platform stacks like Firebase Auth and native billing APIs, which seem to be central to your requirements. Additionally, it seems we share the same values of creating seamless experiences; my strong focus on performance will ensure that the refactoring or patching required doesn't compromise your current build's stability but rather enhances it. Beyond just meeting your present objectives, my ultimate aim is always to build long-term partnerships. This is why attention to detail and customer satisfaction are ingrained in my work approach. Adding on value-added after-service like push notifications is always on the radar. Let's give your app the power boost it deserves! So what are we waiting for? From creating robust authentication to smooth in-app purchases, I'm ready to bring your vision to life- let's build something amazing together!

@jaroslavcaprata

Hi, I can add secure email/password authentication and in-app purchases to your existing mobile app without disrupting the current stable functionality. For authentication, I can implement sign-up, login, validation, forgot-password/reset flow, secure token-based sessions, and proper handling of expired or invalid sessions. Depending on your current stack, Firebase Auth, Cognito, or a lightweight custom backend can be used. For purchases, I can integrate Apple StoreKit and Google Play Billing for subscriptions and/or consumables, including backend receipt validation, purchase status tracking, restore-purchase handling, and protection against client-side tampering. I’ll also review any surrounding code affected by these changes, keep the UX consistent, and test the complete flow on both platforms. Deliverables will include: • Updated source code • Working iOS and Android test builds • Authentication and purchase flow testing • Backend verification logic • Clear setup and deployment notes I’m comfortable extending existing cross-platform apps where security, billing reliability, and clean integration are critical.

@mikes126

Review the existing cross-platform architecture, authentication state, backend APIs, and current purchase-related code before making changes. Implement email/password registration and login with strong validation, secure token/session handling, logout, and forgotten-password recovery using Firebase Auth, AWS Cognito, or the existing backend approach. Add consumable/subscription purchases using the appropriate native billing APIs, including purchase state handling, error recovery, restoration where applicable, and store-compliant flows. Implement secure backend receipt/token verification so purchases are validated server-side and correctly associated with the authenticated user. Refactor affected screens, API calls, and state management to maintain smooth UX, performance, and compatibility with the existing features. Test authentication, expired sessions, invalid credentials, failed/cancelled purchases, duplicate transactions, and successful receipt validation on both platforms.

@rohank2502

Your app is already stable. Next you need sign up, login, and in-app payments that do not break what works. I can start right now. In 24 to 48 hours you get a live sample: email sign up, login, forgot password, and a test buy that is checked and recorded. You try it first, then we fold the same flow into your app. The risky part is store purchases. They must be verified and saved, not just tapped. I have shipped live login systems and I will prove this on your flow before we touch the rest. Share whether you want one-time buys, subscriptions, or both first?

@Cruz1217

If the token is only kept in memory, the app will lose the session after a cold start. I'll store the JWT in secure storage and set up automatic refresh using Firebase Auth's built-in listeners. The purchase flow will be wired through the native billing APIs, with receipt validation on your backend. A common mistake is to trust the client receipt without server-side verification, which opens charge-back risk. I'll add a lightweight verification endpoint and log each transaction, so you’ll see a clean record of successful purchases. I can start right away and will keep the existing UI untouched.

@Shahturk83

Hi there, Adding authentication and in-app purchases to an existing app requires careful integration so the new features feel native without affecting the stability of the current build. I’d like to know which cross-platform framework and backend architecture your app is currently using so the implementation can match your existing setup. I can integrate secure email/password authentication with validation, password recovery, and session handling, along with a complete purchase flow including store billing, receipt verification, and backend recording. I’ll also test the updated builds across platforms and provide clear setup notes for future maintenance. Please send me a MESSAGE on chat so we can discuss this project further. Thanks, Shahzad

@lalitmydevit

With over a decade's worth of experience in Full-Stack Development and a robust understanding of both web and mobile applications, I am confident I can handle your project with diligence and precision. I have extensive expertise in both the technology stack and the types of features that you want to introduce to your app. When it comes to user authentication and implementing in-app purchases, I've worked with various frameworks including Firebase Auth, AWS Cognito, as well as native billing APIs like StoreKit and Google Play Billing. This, coupled with my dexterity in creating secure backend systems, would allow me to seamlessly integrate these features into your existing app without compromising its stability or the UX. What sets me apart is my dedicated approach towards each project – from understanding your business requirements to transforming them into reliable digital solutions. My commitment to post-launch support ensures that your application doesn't just work, but it thrives.

@pavlof555

★★★★★★★★★★★★★★★ I can work full time for you. ★★★★★★★★★★★★★★★ Hi, My name is ⭐Pavlo⭐. I can start the project right now and would like to add secure authentication and in-app purchase functionality to your existing mobile application without affecting current features. I have experience developing mobile apps with Firebase Auth, AWS services, API integrations, StoreKit, Google Play Billing, backend validation, subscription flows, and secure user session management. Could you confirm the current mobile framework and backend technology so I can integrate authentication and purchase verification using the best approach for your architecture? I am ready to implement, test, and deliver the updated builds with proper documentation. Have a great day!

@SaurabhVermaMiet

Hi, I’d be happy to help upgrade your mobile app with secure authentication and a complete in-app purchase flow while keeping the existing functionality stable. I’m currently working with Walmart and have 10+ years of experience in software development. I’m experienced with backend services, APIs, authentication, databases, and integrating third-party services into existing applications. I can handle: • Email/password signup and login with validation • Forgot-password and token-based session handling • Firebase Auth, AWS Cognito, or similar solutions • StoreKit and Google Play Billing integration • Consumables and subscriptions • Backend purchase/receipt verification and transaction recording • Handling failed purchases, expired sessions, invalid receipts, and edge cases • iOS and Android testing • Required code refactoring and performance improvements • Setup documentation and test builds I’ll first understand the existing architecture and cross-platform stack, then implement the features cleanly within the current codebase. I’ll thoroughly test both authentication and purchase flows before delivery. I can provide the updated source code, setup notes/Loom walkthrough, and test builds demonstrating signup, login, and a successful purchase with backend validation. I’m also interested in continuing with future features such as push notifications. Looking forward to working with you.

@alexanders115

Hello, I can review the existing cross-platform app and implement or repair the agreed email/password authentication, password reset, token session handling, and purchase flow around its actual stack. I will begin with a proposed maximum two-hour repository review to confirm the framework, current provider, product types, backend verification path, and the work needed for iOS and Android test builds. I have relevant native iOS purchase experience from Bokstavsbrus, a SwiftUI word game using StoreKit 2 and tests. For this project, Firebase Auth, Cognito, or a comparable provider can be assessed prospectively once the existing code is known. Apple and Google account access, product setup, licenses, and backend credentials remain client-provided. I will document setup and test the agreed flows, without promising store approval or that the entire project fits within the weekly cap. Proposed billing: INR 1,250/hour, capped at 10 hours per week. Initial review and estimate: maximum 2 hours; subsequent work is agreed from the reviewed scope.