What is the best way to inform my mobile app's users that I'm providing a limited-time discount on in-app subscriptions, while still informing them that the discount will end after a month and that renewal will be on the original high price?
I need a way on both Android and iOS apps.
There are many ways to acheive them.
You can implement push notifications in your app(Or may be having already) and send notifications to users in current update or next update that will appear showing them the offer.
You can also update the app details- highlighting the feature on the market(Playstore/ iTunes).