The No-ad purchase is usually tied to your payment account.

As iOS and Android operate on distinct platforms, the No-ad purchase cannot be transferred or restored between iOS and Android devices.

For example, if you bought No-ad on an iOS device, it is tied to your Apple account through the Apple Store, and you cannot transfer that No-ad purchase to an Android device.

The same applies in reverse; a No-ad purchase made on an Android device cannot be transferred to an iOS device.