Flutter Developer – iOS & Android Subscription / In-App Purchase Integration

@ozbas

With more than a decade-long experience, I offer my services as a full-stack software engineer, specializing in mobile app development, particularly with Flutter and Dart. I have successfully completed numerous projects integrating subscription infrastructure on both Apple and Google platforms as required for your Flutter/Firebase mobile application. I am well-versed with Apple StoreKit/App Store Connect and Google Play Billing/Play Console and know how to implement subscription/paywall, entitlements logic as well as managing active, trial, canceled subscriptions and more. One key aspect of the project that I am particularly excited about is ensuring the pricing and free-trial settings can be changed through App Store let alone without requiring an app update or developer changes for normal pricing adjustments—a seemingly small but incredibly important attribute that can save you time and money in the long run. On top of all these, I will provide you with efficient codebases commented impeccably to ensure a seamless handover. Another reason why I believe I am the best fit for your project is my ability to communicate effectively and provide daily updates. I understand the importance of transparency during remote collaborations and will ensure we stay on the same page throughout the durationof the project. In addition, I offer free technical support once the project is completed to address any potential challenges that may arise post-launch.

@shakeebsun

Hi, I can implement the complete iOS + Android subscription system in your existing Flutter/Firebase app, including monthly/annual auto-renewing plans, configurable trials, paywall, entitlements, restore purchases, grace periods, cancellations, expirations, and subscription management. I’ll use Apple StoreKit/App Store Connect and Google Play Billing with store-managed pricing, so normal price/trial changes won’t require an app update. I’ll also connect subscription events to Firebase Analytics and test the complete purchase/restore flow on real iOS and Android devices before submitting the production builds. I’m experienced with Flutter/Dart and Firebase payment/subscription integrations. I can provide the subscription architecture, fixed-price quote, and timeline after reviewing your existing project and product setup. Ready to start immediately.

@alimumtaz112

Hi, It will be an honor for me to work with you. I have got 12 years of mobile application development experience (iOS, android and flutter). I have integrated in app purchases in flutter apps. Lets discuss this in detail and get this started. Looking forward to hear from you.

@Herculesz

Hi, This project centers on implementing a robust subscription and entitlement system on Flutter for both iOS and Android, integrating deeply with Apple StoreKit and Google Play Billing. The main engineering risk lies in reliably managing subscription states, including trials, cancellations, and grace periods, across platforms and devices. I usually design systems with clear separation between subscription validation, entitlement logic, and UI paywall components to maintain scalability and ease of updates. Ensuring pricing and trial configurations dynamically reflect store settings without app updates is critical here. I approach such systems by building comprehensive state management and restore purchase flows that handle edge cases and failure states gracefully. Tracking subscription lifecycle events accurately for analytics is also vital for business insights. Systems like this require careful testing of the entire purchase flow on both platforms to guarantee a seamless user experience and compliance with store policies. If engaged, I would first validate entitlement synchronization strategies and map out the subscription lifecycle flows before implementation. Thanks, Hercules

@rajat07me

Your app is already launch-ready, so the real risk here is not just “adding subscriptions” but getting entitlement states, restore flow, store pricing, and production submission right on both Apple and Google without edge-case failures after release. I’ve worked on Flutter monetization flows involving StoreKit / Play Billing, Firebase-backed entitlement handling, trial + renewal states, restore purchases, and analytics events for conversion tracking. For this kind of setup, I’d keep prices store-driven, centralize subscription state handling cleanly, and test the full purchase lifecycle in sandbox on both platforms before pushing production updates. A small thing I’d also make sure of is that normal pricing/trial changes remain manageable from the store side without app edits. - Are you already using in_app_purchase, RevenueCat, or do you want this built directly against native store flows? - Is analytics already set up in Firebase/GA4 for custom events, or should those events be added as part of this work? - Have the subscription products already been created in App Store Connect and Play Console?

@a4logic

Hello, As a seasoned Flutter and mobile app developer with an expansive wealth of knowledge and expertise in creating end-to-end solutions, I am well-equipped to handle your subscription/payment infrastructure integration project on both iOS and Android platforms. I have built multiple apps where I personally implemented subscriptions on Apple and Google, including architecture that fully complies with Apple StoreKit/App Store Connect and Google Play Billing/Play Console. Having worked on a myriad of mobile applications over the past 15 years, subscription entitlement management and analytics tracking is second nature to me. Additionally, I understand the importance of efficient implementation without compromising user experience - thus my approach would be adhering strongly to a clean code base that is scalable, secure, and user-friendly. And since your project mandates ensuring pricing and free-trial settings can be changed dynamically without requiring app updates or developer intervention, you'd find solace in knowing that I possess a great deal of experience in developing such malleable systems. My passion for delivering quality products on time and my commitment to long-term support set me apart from other developers. My quote comes with not just the satisfaction of getting the job done efficiently but also the assurance that you'll receive regular updates throughout the development process. Let's connect to discuss your project further! Thanks!

@melikatfz

Hi there, Launching a mobile app without a seamless subscription/payment system can lead to revenue loss and user dissatisfaction. The key to avoiding this is a robust implementation on both iOS and Android platforms through Flutter. With my extensive experience in Flutter and subscription infrastructure, I can ensure a smooth integration of subscription/paywall logic across all states, handle store pricing dynamically, and manage subscriptions effectively with Apple and Google systems. Here are my questions: Could you clarify the specific analytics platform you plan to use for tracking conversions and expirations? And do you have any specific design guidelines for the subscription UI, or should I design it? Drop me a message so we can get started right away!

@Eliteinno

✋ Hi, the critical part is keeping entitlement state reliable across App Store, Google Play, Firebase, restore flows, grace periods, and account changes. A paywall that only checks a local purchase result will eventually drift out of sync. I’d implement store-driven pricing, monthly/annual products, configurable trials, restore/manage-subscription flows, and centralized entitlement handling for active, trial, canceled, expired, billing-retry, and grace-period states. I’d also add analytics events and test sandbox flows on both platforms before production submission. Are subscriptions tied to a Firebase-authenticated user account, or should entitlement work without requiring login?

@BarryCrouch

Hello, I’d structure this around three layers: native store products, Flutter purchase handling, and a single entitlement source of truth tied into Firebase. That avoids duplicating billing logic across screens and makes trial, renewal, cancellation, restore, and expiry states much easier to reason about. The app would read pricing directly from Apple/Google, support configurable trials through the store consoles, expose restore/manage actions, track lifecycle events, and validate the full sandbox/test purchase matrix before release builds. Do you want entitlement verification handled only on-device, or do you already have a Firebase/backend function that can validate store transactions server-side? Share the current auth and paywall code and I can map the cleanest integration. Thanks

@gtssoftindia

Let's get started right now. Do you have a quick time to discuss in more brief about your project on a call? I assure you that you will get a secure, scalable, and 100% bug-free Android/iOS app where you will get all kinds of features. I am always looking for a long-term relationship, and I could be the one-stop solution in terms of design, development & QA, so you don't have to search for a new employee for every new project. I can spend at least 40 hours/week on your project (the project will be completed on time). I have been in this sector for like 5+ years now and am pretty experienced in creating apps with using the, Swift, React Native, Laravel, PHP, and Node.js. I am equipped to develop apps using these languages in all industries. Well-versed in in-app purchases, Machine learning, AI solutions, Dark Mode, Siri, Memoji, Real-time tracking, Multilinguality, Live Streaming, Photo/Video Editing, Voice Search, Push Notifications, User Authentication, User Profile Creation, Location, Chat, Map/social media/Payment Integration. Apart from that, I possess great familiarity with UI design principles, patterns, and best practices, Android Architecture Patterns (MVP, MVVM, MVI), REST (Retrofit, OkHttp, WebSockets), and Strong knowledge of Android SDK, different versions of Android. I look forward to the great opportunity to work with you. Best Regards

@cliftonc20

Hi, Your app’s focus on flexible subscription management across iOS and Android requires robust entitlement and state synchronization logic to avoid user friction. The main technical risk is ensuring consistent subscription state recognition and seamless transitions across devices and platforms. While my background centers on backend AI and automation systems rather than Flutter mobile development, I have designed complex scalable systems that handle stateful user entitlements and event tracking in production environments. I typically design systems that separate subscription state management, payment event ingestion, and user entitlement layers to isolate failures and simplify troubleshooting. Early validation of cross-platform subscription state synchronization will be critical. For production reliability, I recommend implementing comprehensive event monitoring and fallback mechanisms to handle payment failures and grace periods gracefully, reducing user churn. I can help outline the subscription event ingestion and entitlement architecture to ensure your system is scalable and maintainable. Clifton

@Jennycreation

Hello, I hope you're doing well. I can implement Flutter subscriptions with StoreKit, Google Play Billing, Firebase entitlements, trials, restores, grace periods, and analytics without hard-coded pricing. I'd structure the purchase layer around store product IDs and server-side entitlement checks, then test both sandbox environments and production builds. Could we discuss the current Firebase setup and subscription architecture before confirming scope, fixed price, and schedule? Thank you, JennyCreation

@toriquldev123

Hello There! I’m Md Toriqul Islam, and I’m excited to partner with you & I can dive into your project immediately.I have rich experience with Flutter/Dart, Firebase, Apple StoreKit, Google Play Billing, auto-renewable subscriptions, entitlement management, and production mobile app launches. I have some questions: 1. Which CRM are you currently using, and do you already have the required API/integration credentials? 2. Do you have a preferred WordPress builder such as Elementor, Divi, or Gutenberg? 3. How many landing pages are you planning to build after the pilot page? I am skilled in Flutter, Dart, StoreKit, Google Play Billing, Firebase Analytics, subscription validation, paywalls, trials, restore purchases, and App Store/Play Store deployment. I understand you need complete monthly/annual subscription infrastructure with configurable trials, real-time store pricing, entitlement states, restore/manage subscriptions, analytics, and production testing on both platforms. I can implement a reliable store-driven subscription architecture so pricing and trial changes remain configurable through App Store Connect and Play Console without app updates. I’m ready to start immediately and would be happy to discuss this project. Looking forward to hearing from you. Best regards, Md Toriqul Islam

@msaqibimran

Hi, I can implement the subscription and in-app purchase infrastructure for your Flutter app, ensuring smooth integration with both Apple and Google platforms. Please share app screen recordingg or a link so I can scope the work. To provide a more accurate quote, could you clarify how you envision the free trial period working? Also, do you have specific pricing tiers in mind for monthly and annual subscriptions? My approach will involve building the necessary entitlement logic, handling various subscription states, and ensuring that changes in pricing or trial settings can be managed through the respective app stores without needing app updates. I've worked on similar implementations, which included tracking analytics for trial starts and conversions, and I’ll ensure that the purchase flows are tested thoroughly on both platforms. Looking forward to discussing this further. Best regards, Mohammad

@invoketech

Hello, we have experience with Flutter, Firebase, Apple StoreKit, Google Play Billing & mobile subscription systems and have carefully reviewed your requirements. I have 10+ years of experience implementing production-ready mobile applications. We can implement a complete subscription infrastructure for both iOS and Android, including monthly/annual plans, configurable trials, paywalls, entitlement management, restore purchases, and subscription state handling. WORKING FLOW: Store Integration → Configure App Store Connect and Google Play subscriptions with store-managed pricing and trials. Purchase Flow → Implement monthly/annual auto-renewing subscriptions with secure entitlement handling. Subscription States → Handle active, trial, canceled, expired, failed-payment and grace-period states. Firebase & Analytics → Track trial starts, conversions, cancellations and expirations. Testing & Deployment → Test sandbox/internal purchase flows and submit production builds to both stores. We will ensure subscription pricing is never hard-coded and remains configurable through Apple and Google consoles without app updates for normal pricing changes. I will deliver FULL SOURCE CODE, SUBSCRIPTION CONFIGURATION, TESTING, STORE DEPLOYMENT, DOCUMENTATION, AND 3 YEARS OF POST-LAUNCH SUPPORT on time. I eagerly await your positive response. Thanks Invoke Tech

@ranjika08

Since the Flutter/Firebase app is already finished, this stage is really about making the subscription system reliable enough for launch: trial logic, renewals, grace period, restore purchases, and device/account recognition all need to behave correctly under both stores’ rules. I’ve handled production billing setups in Flutter where the tricky part was not the paywall UI itself, but the entitlement architecture behind it: syncing store status properly, avoiding hard-coded pricing, and tracking starts, conversions, cancellations, and expirations for reporting. My approach would be to wire the products to store-managed pricing, structure the subscription state flow cleanly, then run full end-to-end sandbox testing on iOS and Android before store submission. I can also help make sure the manage-subscription path and restore flow feel clear for users. - Do you want the subscription state validated only on-device, or backed by Firebase/server-side verification as well? - Is there one premium tier with monthly + annual plans, or multiple subscription groups/products?

@abhishek060

Hi, Since the app is already built, I’d focus on adding the subscription part without disturbing the existing app structure. For me, the important part here is not just getting the payment screen working. Trial, renewal, cancellation, failed payment, grace period and Restore Purchases all need to stay in sync with Apple and Google. Pricing should also come directly from the stores, so you can change it later without releasing another app update. I’d first check the current Flutter/Firebase setup, then add the subscription and entitlement flow around it. I’d also test the actual purchase and restore flows on both iOS and Android before submitting the builds. Just wanted to confirm two things: is subscription data already handled in Firebase? And are the products already created in App Store Connect and Play Console? Thanks

@sharjeelrb

Hello, I can integrate iOS & Android subscriptions and in-app purchases in Flutter, including product setup, purchase flow, restore purchases, subscription status, renewals, cancellations, and validation. I have hands-on experience with App Store Connect, Google Play Console, Flutter IAP, and subscription testing, and can ensure everything works reliably on both platforms. Available to start immediately.

@poojatdsl

Hi, I can implement the complete Flutter subscription infrastructure for iOS and Android using the native App Store and Google Play billing systems, with Firebase handling entitlement and analytics synchronization. I’ll handle monthly/annual auto-renewing subscriptions, configurable free trials, paywall and entitlement logic, restore purchases, cross-device entitlement recognition, active/trial/canceled/expired/grace-period states, Manage Subscription links, and secure receipt/purchase validation. Subscription prices and trial settings will remain store-controlled rather than hard-coded in Flutter. The implementation will also track trial starts, conversions, cancellations, expirations, and failed payments, with complete purchase-flow testing through App Store Connect and Google Play testing environments. Relevant experience includes Flutter/Dart, Firebase, mobile payment integrations, authentication, entitlement management, REST APIs, analytics, and production iOS/Android app development. You’ll receive the integrated Flutter code, Firebase/backend configuration, tested subscription flows, restore/management functionality, analytics events, and production-ready builds for both stores. Estimated completion: 3–5 days Fixed price: Can be finalized after reviewing the existing Flutter/Firebase codebase. Let’s connect to review the current app architecture and implement the subscription layer cleanly without disrupting the launch build.