In your Android app, tap the menu bar on your home screen to see the number of Pro days left before the end of your current billing cycle.
For subscriptions purchased via iTunes, please find your renewal date in your iTunes subscription settings, or on your invoices from Apple.
For subscription purchased via www.jiosaavn.com/pro, log into www.jiosaavn.com, go to Profile (top right-hand corner) > Account Settings > Subscription to see details.