With my “old” bank i could set up SMS messages to alert me to certain criteria. In general Monzo has gone far beyond that with its notifications and made may of the options irrelevant. However, i do miss the alert when my balance falls below a certain amount. I could set it so if my balance dropped below £100 for example then I know I’d need to take action to manage the remainder or transfer from another account. It looks like for specific budgets it might alert when you near the limited but I cannot see a away to set an alert when my total account balance drops below a certain amount.
I know this is a suggestion for native functionality but my immediate thought here was to suggest IFTTT.
Surely this is a perfect use case for the Monzo + IFTTT integration. But actually Monzo balance doesn’t seem to be available as an IFTTT trigger 
Seems odd to me given IFTTT integration is almost two years old.
Agree that the IFTTT integration would have been a good workaround Although I’ve used IFTTT for years I wasn’t aware Monzo was on there as an option till I saw another post on this forum after I posted this suggestion last night.
Was a little surprised not to see balance amount as an option on there as this is such a simple thing to help people manage their money better.
I note there is a third party widget using the API that allows a widget to display balance but I would prefer to avoid using the services of an unknown/untested solution. However I dont really want to be constantly logging in to app just to check balance either.
I have something similar set up on Santander and would be nice to see Monzo release it or balance in IFTTT
Perhaps also when I’m under £x pef day until payday.