I checked the google play and I saw an update , on the changelog It says :
- new wallet encryption schema.
- auto-upgrade to new wallet encryption schema.
Is it something to be worried about ? I mean If you upgraded your encryption algorithms , does it mean that the old ones were weaker and we should change our passwords ?
It also would be very nice If you could make the wallet checks for update when launching it because checking the google play often isn't something the average user would do.
The upgrade is ofcourse improving the strength of the encryption, otherwise there wouldn't be much reason to upgrade it.
However the strengthening is done on the encrypted primary key, to make sure it remains impossible to break the encrypted primary key, now and in the future (the scheme is now also future-proof, we can easily strengthen it more in 1~2 years).
So there's no reason for you to change your password, it's not your password that is ever at risk.
I'll add it to our feature requests to have a way to prompt users that there's an update, good idea!