The app gives you quick access to the sites and slovnik.seznam.cz prirucka.ujc.cas.cz
For devices with Android 6.0 and higher version application allows you to access these sites from the context menu, select a word in any other application. This is especially handy when you read the text in a browser and encounter an unfamiliar word - just two clicks, you can see its translation in slovnik.seznam.cz. Or if you're writing a message and do not know the correct form of the word - You can quickly view all forms of the word in prirucka.ujc.cas.cz