OP-Z: iPhone or iPad, it has all the same features, is about the same price, same size as you would have carried, same battery, whatever
OP-1: Literally just about anything. It is a 4 channel digital recorder. You have an iPhone with USB-class compliant audio, you can do multichannel recording. Use a guitar, some iOS plugins and a $40 DAC. If you're going to complain about buttons, go blow your cash on a midi controller (it will still come up cheaper than ANY OF THE OP-1 MODELS!)
Pocket Operator: God, please grant me reprieve from finite suffering. There is no hope for humanity if we are looking for "alternatives" to grooveboxes with kilobyte-sized memory. What do I say? Fairlight CMI? Do I send a picture of the Mellotron as a joke? The Ti-84 graphing calculator? Heaven forbid... the Akai Rhythm Wolf. Is there a future for us yet if iPad children would rather pay college-tuition prices for Fischer-Price hardware that can do what their iPad does already?
You'll never please everyone, which is why snake oil still finds customers in the 21st century.
OP-1: Literally just about anything. It is a 4 channel digital recorder. You have an iPhone with USB-class compliant audio, you can do multichannel recording. Use a guitar, some iOS plugins and a $40 DAC. If you're going to complain about buttons, go blow your cash on a midi controller (it will still come up cheaper than ANY OF THE OP-1 MODELS!)
Pocket Operator: God, please grant me reprieve from finite suffering. There is no hope for humanity if we are looking for "alternatives" to grooveboxes with kilobyte-sized memory. What do I say? Fairlight CMI? Do I send a picture of the Mellotron as a joke? The Ti-84 graphing calculator? Heaven forbid... the Akai Rhythm Wolf. Is there a future for us yet if iPad children would rather pay college-tuition prices for Fischer-Price hardware that can do what their iPad does already?
You'll never please everyone, which is why snake oil still finds customers in the 21st century.