{"id":8558,"date":"2025-05-29T19:32:49","date_gmt":"2025-05-29T14:02:49","guid":{"rendered":"https:\/\/innovationm.co\/?p=8558"},"modified":"2025-05-29T19:42:40","modified_gmt":"2025-05-29T14:12:40","slug":"how-to-add-in-app-purchases-to-your-flutter-app","status":"publish","type":"post","link":"https:\/\/www.innovationm.com\/blog\/how-to-add-in-app-purchases-to-your-flutter-app\/","title":{"rendered":"How to Add In-App Purchases to Your Flutter App"},"content":{"rendered":"<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\"><br \/>\nIf you\u2019re building a Flutter app and want to sell stuff like premium features, digital items, or subscriptions, in-app purchases (IAP) is a solid move. I\u2019m gonna break down how to set this up in Flutter using the <\/span><b>in_app_purchase<\/b><span style=\"font-weight: 400;\"> package.<\/span><\/p>\n<p style=\"text-align: justify;\"><b>What Are In-App Purchases?<\/b><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">In-app purchases let users buy things right inside your app,like extra game lives, a pro upgrade, or subscriptions. The App Store and Google Play both support this, and Flutter\u2019s <\/span><b>in_app_purchase<\/b><span style=\"font-weight: 400;\"> package is the tool to connect it all.<\/span><\/p>\n<p style=\"text-align: justify;\"><b>Step 1: Add the Package<\/b><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">You\u2019ll need the <\/span><b>in_app_purchase<\/b><span style=\"font-weight: 400;\"> package. Just add it to <\/span><b>pubspec.yaml<\/b><span style=\"font-weight: 400;\"> under <\/span><b>dependencies <\/b><span style=\"font-weight: 400;\">and run <\/span><b>flutter pub get<\/b><span style=\"font-weight: 400;\">.<\/span><\/p>\n<p style=\"text-align: justify;\"><b>Step 2: Set Up Products in Stores<\/b><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">You have to create products in the App Store and Google Play dashboards.<\/span><\/p>\n<ul style=\"text-align: justify;\">\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>App Store Connect:<\/b><span style=\"font-weight: 400;\"> Go to \u201cIn-App Purchases\u201d for your app and set up products you want to sell digitally. Grab the product IDs you create for using inside the application.<\/span><\/li>\n<\/ul>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">If you want to create subscriptions then go to Subscription sections and create renewal and non renewal subscriptions there.<\/span><\/p>\n<ul style=\"text-align: justify;\">\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Google Play Console:<\/b><span style=\"font-weight: 400;\"> Head to \u201cMonetization\u201d &gt; \u201cProducts\u201d &gt; \u201cIn-app products\u201d or \u201cSubscriptions.\u201d Create your products and note their IDs (e.g., `pro_upgrade`).<\/span><\/li>\n<\/ul>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Make sure your app is ready in both stores with stuff like a signed APK for Google or a provisioning profile for Apple.<\/span><\/p>\n<p style=\"text-align: justify;\"><b>Step 3: Key Functions and APIs for the Purchase Flow<\/b><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Here\u2019s the core stuff you need to handle IAP in Flutter using the <\/span><b>in_app_purchase<\/b><span style=\"font-weight: 400;\"> package. These are the main functions and APIs to focus on:<\/span><\/p>\n<ul style=\"text-align: justify;\">\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>InAppPurchase.instance<\/b><span style=\"font-weight: 400;\">: This is your starting point. It\u2019s the singleton object from the <\/span><b>in_app_purchase<\/b><span style=\"font-weight: 400;\"><span style=\"font-weight: 400;\"> package that you use to access all IAP features.<\/span><\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>isAvailable()<\/b><span style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">: Call this to check if the store (App Store or Play Store) is online and ready. It returns a boolean. If it\u2019s false, the store\u2019s down, so you might wanna show a \u201ctry again later\u201d message.<\/span><\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>queryProductDetails(Set&lt;String&gt; productIds)<\/b><span style=\"font-weight: 400;\">: Use this to fetch details about your products, like their name, price, and description. You pass in a set of your product IDs . It returns a <\/span><b>ProductDetailsResponse<\/b><span style=\"font-weight: 400;\"> with a list of <\/span><b>ProductDetails<\/b><span style=\"font-weight: 400;\"><span style=\"font-weight: 400;\"> objects.<\/span><\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>buyNonConsumable(PurchaseParam purchaseParam)<\/b><span style=\"font-weight: 400;\">: This kicks off a purchase for non-consumable products (like a one-time pro upgrade). You create a <\/span><b>PurchaseParam<\/b><span style=\"font-weight: 400;\"> with the <\/span><b>ProductDetails<\/b><span style=\"font-weight: 400;\"><span style=\"font-weight: 400;\"> of the item the user wants to buy.<\/span><\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>buyConsumable(PurchaseParam purchaseParam):<\/b><span style=\"font-weight: 400;\"><span style=\"font-weight: 400;\"> Similar to `buyNonConsumable`, but for consumable products (like in-game coins that can be bought again). Use this if your product isn\u2019t a one-time purchase.<\/span><\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>purchaseStream<\/b><span style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">: This is a stream that sends updates about purchases. Listen to it to catch events like when a purchase is completed, fails, or is pending. It gives you a list of `PurchaseDetails` objects with info like `status` (e.g., `PurchaseStatus.purchased` or `PurchaseStatus.error`).<\/span><\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>completePurchase(PurchaseDetails purchase)<\/b><span style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">: Call this when a purchase is successful (i.e., `status` is `PurchaseStatus.purchased`) to finalize it. This tells the store you\u2019ve delivered the product (like unlocking a feature).<\/span><\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>restorePurchases()<\/b><span style=\"font-weight: 400;\">: This lets users restore their previous purchases (handy for app reinstalls). It triggers the `purchaseStream` with details of past purchases.<\/span><\/li>\n<\/ul>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">You\u2019ll use these to check the store, load product info, start purchases, and handle the results.<\/span><\/p>\n<p style=\"text-align: justify;\"><b>Step 4: Handling Purchases<\/b><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">To process purchases, listen to the `purchaseStream`. When you get a `PurchaseDetails` object, check its `status`:<\/span><\/p>\n<ul style=\"text-align: justify;\">\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">If it\u2019s <\/span><b>PurchaseStatus.purchased<\/b><span style=\"font-weight: 400;\">, the user bought the item. Then verify it with then verifyPurchase Api of apple. If it is a valid purchase then\u00a0 deliver the product (e.g., unlock pro mode) and call <\/span><b>completePurchase<\/b><span style=\"font-weight: 400;\"> to wrap it up.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">If it\u2019s <\/span><b>PurchaseStatus.error<\/b><span style=\"font-weight: 400;\">, something went wrong. Show a friendly \u201coops, try again\u201d message.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">If it\u2019s <\/span><b>PurchaseStatus.pending<\/b><span style=\"font-weight: 400;\">, the purchase is still processing (rare, but handle it with a \u201cplease wait\u201d message).<\/span><\/li>\n<\/ul>\n<p style=\"text-align: justify;\"><b>Step 5: Testing It Out<\/b><\/p>\n<ul style=\"text-align: justify;\">\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Google Play<\/b><span style=\"font-weight: 400;\">: Add test users in the Play Console under \u201cSettings\u201d &gt; \u201cAccount details\u201d &gt; \u201cLicense testing.\u201d<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>App Store<\/b><span style=\"font-weight: 400;\">: Create sandbox testers in App Store Connect under \u201cUsers and Access\u201d &gt; \u201cSandbox Testers.\u201d<\/span><\/li>\n<\/ul>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Test on a real device (emulators don\u2019t work for IAP). Make sure your product IDs match exactly, and try the whole purchase flow.<\/span><\/p>\n<p style=\"text-align: justify;\"><b>Step 6: Going Live<\/b><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Once testing is done and all scenarios work properly, submit your app to the App Store and Play Store. Also check that your in-app products are approved in both dashboards. Be aware that you meet both store guidelines while creating the products<\/span><\/p>\n<p style=\"text-align: justify;\"><b>Quick Tips<\/b><\/p>\n<ul style=\"text-align: justify;\">\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Handle Errors<\/b><span style=\"font-weight: 400;\">: If the isAvailable() function returns false it means the store is not available\u00a0 or a purchase fails, show related messages carefully for every error.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Subscriptions:<\/b><span style=\"font-weight: 400;\"> For subscription, check PurchaseDetails for purchase info and handle it properly. And for renewal subscriptions, handle webhooks properly at your backend.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Debugging<\/b><span style=\"font-weight: 400;\">: Use `debugprint` statements or your IDE\u2019s debugger to track down issues with product loading or purchases.<\/span><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>If you\u2019re building a Flutter app and want to sell stuff like premium features, digital items, or subscriptions, in-app purchases (IAP) is a solid move. I\u2019m gonna break down how to set this up in Flutter using the in_app_purchase package. What Are In-App Purchases? In-app purchases let users buy things right inside your app,like extra [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":8559,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1586,1587,1585],"tags":[1590,1594,1588,1589,1595,1591,1593,1597,1592,1596],"class_list":["post-8558","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-app-store","category-google-play","category-monetization","tag-add-iap-to-flutter-app","tag-app-store-purchases","tag-flutter-in-app-purchases","tag-flutter-monetization","tag-flutter-revenue-model","tag-flutter-subscription-integration","tag-google-play-billing","tag-iap-in-flutter","tag-in_app_purchase-package","tag-mobile-app-monetization"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How to Add In-App Purchases to Your Flutter App - InnovationM - Blog<\/title>\n<meta name=\"description\" content=\"Learn how to add in-app purchases to your Flutter app using the in_app_purchase package. 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