How to migrate old subscriptions when i don't have complete data?

Question

Hey thanks for listening. I have been using Google play billing library since past 2 years and now switching to Revenue cat. I have few questions regarding migrating subscribers of my app.

So there are two types of subscribers 1. monthly and 2. annual subscribers. I have saved their data in firebase realtime database and nowhere else.

Your docs were really helpful in integrating the Purchase SDK of RevenueCat but what i am not able to understand is about migrating these active subscribers (around 20).

Won’t the RevenueCat automatically be able to communicate with Google Play Servers and check if a user is premium user and active?
If not and if i have to manually update the data (which is incomplete as i don’t know about the app_user_id) then what is the best possible way to handle this?

sundeep · Accepted Answer

Hi@Rishabh Jain,Have you checked out ourMigrating Subscriptionsdoc yet? Could be useful to go over, there’s also a handy flowchart in there that walks you throughdifferent options:https://docs.revenuecat.com/docs/migrating-existing-subscriptionsIt sounds like you don’t have too many users to migrate over, so if you don’t have very complete data in your own infrastructure, you could try client-side migration where you call syncPurchases if the subscription exists in your old system but not in RevenueCat:https://docs.revenuecat.com/docs/migrating-existing-subscriptions#client-side-migrationThis will create the user in RevenueCat and grant them the appropriate entitlements associated with their purchases.

Giovanni · Answer

Hi@Rishabh Jain,Have you checked out ourMigrating Subscriptionsdoc yet? Could be useful to go over, there’s also a handy flowchart in there that walks you throughdifferent options:https://docs.revenuecat.com/docs/migrating-existing-subscriptionsIt sounds like you don’t have too many users to migrate over, so if you don’t have very complete data in your own infrastructure, you could try client-side migration where you call syncPurchases if the subscription exists in your old system but not in RevenueCat:https://docs.revenuecat.com/docs/migrating-existing-subscriptions#client-side-migrationThis will create the user in RevenueCat and grant them the appropriate entitlements associated with their purchases.Hi there.I have the same question, but I have about 100 users. I also have their tokens but not the app_user_id.The difference is that I’m also migrating from Java to Flutter, so it is complicated for me to understand the documentation.

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