Not ready for prime time

I had 123qwerty on my iPhone 6s plus, on an iPad 3 retina and my brother had it on his 6 plus, when it works its great, but it only took us a few days to realize its too problematic to keep. Way too often the standard keyboard comes up, even in apps where 123 did work, and yes, I read the instructions and moved 123 to the top of the keyboard list. Sometimes nothing comes up at all and its very difficult to get it back. The instructions also suggests many workarounds, which in itself shows there are problems.

kohanmike about 123QWERTY: Customize Alphanumeric Keyboard Keys, v2.1