Machines can do the work
I'm usually loathe to put too much trust into algorithms, and it's still a bit jarring to watch my diligent tapping produce a nonsensical jumble of letters. Fortunately, Minuum's autocorrect and predictive text features are quite reliable, usually converting a mess of text into the exact word I needed. And when it's wrong, I can scroll through a list of suggestions sitting just above the keyboard and tap the word I need. As expected, though, since the entire system is based on predicting the word you were looking for from the letters you typed, it's less effective when you have a long list of possible words. Right now, for example, I'm getting "if," "it," and "is," but what I really wanted was "of."
I also like that Minuum's predictive text works retroactively Just. tap on any text that you've already written, and you'll get suggestions for other word options. That's a great feature if you've ever typed out a lengthy email only to find nonsense words scattered within. The app will also learn new words as you type (if you let it), and does so rather well: after just a few Twitter conversations, it picked up on the obscure gaming acronyms I was throwing around and worked them into its vocabulary.
Minuum hasn't exactly changed my life or opened my eyes to hitherto unimagined possibilities in the realm of mobile phone input methods. But it has made the prospect of tapping out (virtual) reams of text on a 5-inch screen palatable.
But here's the thing: I'd hardly ever type something as lengthy as a review or an essay on my phone. But even if you do, you probably have your own solution -- if not a physical keyboard, then probably free services like SwiftKey or Swype. What's more, on a device with a larger screen (like a tablet), I've never been bothered by the amount of space that a keyboard occupies, which renders Minuum's primary benefit moot. Instead, the app makes the most sense on the smallest screens possible. And that's right where the developers are aiming -- on the Minuum website it's touted as "the best keyboard for smart watches." I haven't tried it on my wrist yet, but it looks awesome.
I'm definitely a bit faster (and a lot more accurate) with Minuum than with the stock Android keyboard, but whatever keyboard you're most comfortable with is likely enough for you. That makes it rough to recommend for the $4 download. Fortunately, though, the free version of Minuum lets you try the app out for 30 days, which should be more than enough time to find out if it's right for you.