Wio

★★★★★ Easy to use, and the steps to connect a device and a grove are very easy to follow. Usage is quite basic, but it also provides access to more advanced possibilities The groves have proper images so are easy to add. Most of the groves are supported as well, so a search or filter function would be a nice extra.

★★★★★ If you understand how to configure then only this app is helpful. Most of the wio link devices having wifi problem. Once it works everything goes smooth. No programming. No breadboard and no soldering.

★★★★★ Since v2.2.2 App work like intended. I am able to add links directly in the App on a Nexus 7 and a Nexus 5x, both running latest Android 6. It takes some time until connected Links and their connected Grove modules appear if the app is reused after some days.

★★☆☆☆ Missing lots of Grove components The list of supported Grove components is too small, shouldn't all Grove components sold by Seeed be supported by the app? Half the components I have are unsupported and thus useless. When will more components be supported?

★★☆☆☆ I would steer clear of the Wio product line for now. Wio is a great concept, but suffers from an immature/incomplete set of drivers, this confusing/poorly working app, and poorly documented ecosystem right now. This app is a part of the whole problem. It failed to connect to my device (Android/solution had to use the CLI). It was the first glimpse given into what Grove sensors were compatible with the Link device and what weren't -- shown to me well AFTER I bought a set of mostly unusable sensors. Nice one Seeed -- thanks a lot. Finally, it is confusing. The drag and drop in particular is very poorly designed. There is little indication that not all sensors are compatible with all slots. Worse, when you grab an item to drag, the slots that are INCOMPATIBLE say "Drag device here", whereas the slots that are actually compatible, lose that indicator. This is the exact OPPOSITE to how it should work. Why would this app tell me to drag a sensor to an incompatible slot??? Anyhow, what I thought would be a fun experiment with solderless IoT, from a company I would normally trust, has turned into an expensive fail. It is unfair to present this as a working product/ecosystem.

★★☆☆☆ App won't connect after sharing wifi password just sends your router password to China then crashes. Goes back to step 1&2. Then crashes. No good.