I've been trying to figure out how to adjust the timer from the device itself since I first started using it a few weeks ago. Thanks, @HunterC for posting that video. It's helpful, but it's not enough. It shouldn't be necessary to watch a video to learn how to change the timer. I mean this statement a few ways. First off, this information should be readily available in writing. It's not. It's not in the Quick Start Guide. It isn't in your oddly-named Wi-Fi Manual (I'll rant at a later time about the logic of providing device instructions in a vertically-formatted phone app by embedding a landscape-formatted PDF). It wasn't even in your knowledgebase until just last week.
The other meaning is that performing such a basic function on the physical device shouldn't be so complicated that it requires a demonstration (or even written instructions, for that matter). Why isn't changing the timer as simple as pressing (or maybe pressing and holding) the timer button and then adjusting the time with the scroll wheel? The required press, hold, and chant sequence is obscenely non-obvious!
All too often, companies making connected devices forget the need for analog or physical controls, and though you make it possible here, the timer control sure feels like an afterthought. You can't expect everyone in the household to download your app to use this device. So the basic functions of the device need to be inherently available on the device itself. Easily. This would be a non-starter situation in many households.
I'm hoping you take the negative feedback you're getting here and in the knowledgebase to heart and rethink how this works. And I'm hoping it's possible for you to change this with a firmware update.