Do you think you will include balance modification alert for X address in the future ?
Could be great to have an alert for incoming tx on a said address
Will do that, thanks for the suggestion! Sorry for the delay.

Do you still have control of 1NinjabXd5znM5zgTcmxDVzH4w3nbaY16L ?
I do.
is there a possibility that the default result on /fee alert is not an "Economy" fee?
Such notification is often not usable because the economy fee is not enough to complete the transaction, especially lately when the network is overloaded.
Yep, got an alert for <= 2 sat/vbyte, took a look at the fees and the minimum for a next block was around 40 sat/vbyte.

I'll change the default and add the option to let the user choose between fastest, half-hour, hour, etc...