UniChar — Unicode Keyboard funktioniert nicht

UniChar features thousands of symbols organized neatly into categories as well as a complete Unicode table. * You can quickly search for the symbol you’re looking for by name or by drawing, type symbols in any app with the custom keyboard, and collect your favorite symbols to access them even quicker.  UniChar is a powerful yet beautiful Unicode character app and keyboard that allows you to quickly find, type, and work with special symbols. “UniChar is a cool little app and keyboard, and offers access to a huge world of Unicode characters that are otherwise absent within the standard iOS keyboard.  "This iOS keyboard app will give you all the Unicode characters you’ll ever need". “It’s a full-featured utility for searching and copying symbols … it’s always nice to see a developer who’s dedicated to improving this kind of utility over time and adopting new features … it's a very handy app.  Or use UniChar alongside other apps with Multitasking support on iPad. * All Categories can be unlocked via a one-time in-app purchase. ** Search by Drawing is powered by machine learning algorithms utilizing Turi Create, Core ML, and Vision.  For developers, UniChar is an efficient tool to work with Unicode code points and HTML entities.  As you draw, a convolutional neural network processes your drawing to predict which symbols it matches.  "On the Mac, you can type any character [with] the Emoji & Symbols viewer ...  Revamp your workflow with Universal Clipboard – copy on your iPhone, paste on your Mac.  But UniChar changes that".  The selection on iOS is much more limited ...  You can help improve symbol recognition by submitting your own drawings!