Android Device Change

Hello,

I have a subscription for 1 Windows and 1 android device. The app was working fine. But I just changed my android smartphone and cannot use my subscription key anymore, it does not accept. What should I do to keep using my existing key code in my new smartphone ? If somebody can show me the way,I would be very grateful.

It depends on how you purchased the CCleaner for Android licence.

Is this a multi-device licence purchased form Piriform?
ie. CCleaner Pro Plus (3-devices), or CCleaner Premium (5-devices).
OR
Do you have one CCleaner Pro Windows licence purchased from Piriform and one CCleaner Android licence purchased through the Google Play Store?

If you have a Multi-device licence from Piriform then you need to Register/Activate it on your new phone.
See: CCleaner Support Community

However if you bought CCleaner Android through the Play Store then it does not have a licence key but instead is linked to the Google account you were logged into when you purchased it.
Log into the same Google account on your new phone and CCleaner Android Pro will be active on that Google account.
So you may want to make that Google account the default account on your new phone.
See:: Add or remove an account on Android - Android Help

You may also find this useful for transferring other apps and data from the old phone to the new one (if you haven’t already used Samsung Smart Switch or similar): Switch to a new Android device - Android Help

from “How to register and activate CCleaner Professional” on ccleaner support:

“Additionally, license keys for other products such as CCleaner Professional for Windows/macOS may not be used to register CCleaner Professional for Android.”