If this isn't the most useful Watch app then I don't know what is. Until I found this I struggled to find an app whereby the complication element was of use. This changed that however, and it's a simple reason why.
Being able to type a message to one's self that's on permanent display is what makes this so useful. Like many people, I look at my watch many times a day, more so with the Apple Watch, so this function makes reminders a joy.
Just pop the text you want into the iPhone app and it'll sync immediately with the Watch. You get varying character spaces according to which face you apply it to, the most being on the Modular face of course - 20 characters per line with space for three lines.
It's so simple it's genius. I'm surprised there isn't something like this built in, but that's the beauty of opening development for a platform.
Great stuff, and for 79p you'd be silly not to just get it. I bet you'll use it if you do!