Google hasn't had much of an interest in Android tablets since the days of the Motorola XOOM and Android Honeycomb. As a result, most of the company's apps aren't designed with tablets in mind, and third-party applications have largely followed suit. Sure, Android tablets can technically run all Android apps, but many of them have stretched-out layouts that were intended for 6-inch screens. Some even force a portrait orientation (Google Tasks, I'm looking at you).
It can be hard to find applications with well-designed tablet interfaces, especially when the Play Store's only criteria for the "Designed for tablets" label is developers adding a large screenshot to the app listing. The only way to find out if an app is actually designed with tablets in mind is to try it out yourself, so that's exactly what we did for this roundup.