I can confirm that the Rachio 3 with an EveryDrop 1004-EX flow meter will only inform you of a leak if it happens within 10 minutes of the last zone shutting off at the end of a normal cycle.
I know this because I had a zone valve body crack a few days ago, the water was running for hours, and I didn’t receive any notification. It wasted over 2,000 gallons of water.
I’ve seen a bunch of mentions for Rachio’s support of flow meters, and how they can detect leaks, but nothing about a time limit. It’s ridiculous - the Rachio is receiving the info from the flow meter, it knows the system isn’t running, what’s so hard about sending an alert?
I recently had a problem with my master valve, and instead of replacing it I just removed it, figuring “Well, I have a flow meter, so I’ll know instantly if there’s a problem”. So much for that idea.
Any water savings that Rachio was going to get me are now out the window, just because for some weird reason, they only monitor for leaks for 10 minutes.
I actually spent more on the flow meter and install than I did for the Rachio. What a waste of time and money.