Has novelty value!
I get the feeling this is a 'work in progress', so I look forward to seeing how it develops.
Unfortunately, although the display rotates it does not resize for landscape view, meaning part of the keypad is missing and the readout is not visible at all!
…Reverting to portrait mode:
Stack behaviour is a bit odd: results are not automatically put into the X register, thus requiring an extra tap on the 'Enter' key to get them there.
Also, the keys themselves do not always register a hit, so watching the readout becomes a priority — and it's easy to make irretrievable errors.
It seems its most practical purpose is as a base10 / base12 conversion tool. However, I do like the concept and it comes without adverts, for free. Highly commendable!
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