The history of the official HP calculators is a little bit strange. It started with four - the HP 12C, the HP 12C Platinum, the HP 15C, and the HP PRIME PRO. These all had HP down as the developer, and had zero support and just a few updates in 10 or more years. It's therefore nice to see the rerelease of the HP 12C and 15C with a perfect redesign to suit today's devices. Portrait mode is now supported with the full keypad available. Sadly, the 12C Platinum was simply removed from the store, so I had to buy this 12C. Fortunately the 15C update was free. If you're an HP calculator fan like me, you'll want both the 12C and 15C. It's great that the 12C is also supported on the M-series Macs. It is nice, but I wish at least numbers could be entered from the keyboard. Also sadly, the PRIME PRO has not been updated. It's okay on iPad, but disappointing on iPhone. Fingers crossed that will be addressed.
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