I bought this to use with the Soil Moisture sensors which are total garbage, ( see my detailed review on the Amazon Coop store's moisture sensor to see why.) Honestly, I didn't have much negative to say about the hose bib timer itself; it connected every time when in range, and it always functioned properly when not connected to the soil sensors. However, the fact that you needed to be within 30 ft of it when outside, or right next to the outside wall when in, begs the question, " why is this 'smart' and what's the purpose of it being BT"? First, "smart" devices are typically able to connect to the "Internet of things", a web of intercommunicating devices and services that can send and receive info and commands from each other, i.e. I can tell Alexa "lets watch a movie", she turns the TV and audio receiver on, dims the lights, and turns my phone to mute. I could also say " It's time for bed", Alexa may turn off the lights, turn on fan, lock the front door, and arm the security system. This timer, in contrast, can only connect, via Bluetooth, to it's app on your phone. It does not connect to any other than it's own sensors and app; it cannot be controlled by any other smart devices, services, or intercommunicate within an "internet of things". That doesn't make it a smart device, it makes it a Bluetooth device. Plus, the app it's self has no "Smart" features; it can't delay watering because it can pull up the weather and see it's raining or water more frequently because it is hot and dry, nor can you set it for any watering setting based on location, the plants type or species being watered (tree vs lawn, vs landscape), drip irrigation vs sprinkler, so on. It literally is a frequency and duration timer just like every one you buy in the store that has buttons on it. The ONLY difference is that you can control it with your phone- but it functions the EXACT, SAME, WAY. Save your money. Lastly, the range I was getting on this was less that 30-40 ft direct line of sight ( less if ANYTHING was blocking the signal) and through walls it was less than 10-12 ft. To use in my house, Id have to stand right next to the exterior wall of my house. There is no remote access, meaning you can't control it while not within this range and definitely not while away from home. Unless the hose bib timer is hidden, or hard to reach, since you have to get so close to operate it anyhow, there is little benefit to having a Bluetooth controlled timer. Plus, since you typically set it and forget it, how often are your really accessing it? Save yourself money and buy a multiport digital hose bib timer and at any big box store.
