I opened .keystore file with KeyStore Explorer
https://keystore-explorer.org/
It shows me:
Valid from 2018 to 2046
Exactly
10,000 days, 0 hours, 0 minutes and 0 seconds
27 years, 4 months, 15 days
My question is:
Can I update my app after this validity? probably not…
(Good validity time, but…)
Is it better to create and import custom keystore?
or will it cause problems?
See e.g. here:
https://docs.wso2.com/display/ADMIN44x/Renewing+a+CA-Signed+Certificate+in+a+Keystore
https://developer.android.com/studio/publish/app-signing
Btw, what is the probability that there will still be apps like today in 27 years? I wouldn’t worry about that today.