Should I replace my TI-89 Swiss Army Knife on the table with the HP Prime?

[rawi]

(07-25-2022 07:19 AM)Tom Flatterhand Wrote:  I sporadically observe the development of the HP Prime and have read some of the tests that appeared in the beginning. There were also written about some quirks. Now I got an HP Prime as a birthday present and would like to know how HP-41C, HP-48 and TI-89 owners rate the HP Prime?

Have initial quirks been eliminated over the years?

How good is the CAS compared to the Derive built into the TI-89?

How have you come to terms with the three-part nature (home mode, CAS mode, apps)?

Is it true that the TI-Nspire™ CX CAS and the HP Prime have the same CAS (Giac/Xcas)?

Maybe someone of you knows about the mentioned calculators and may answer me? i would be very happy.

Sorry, of course I wanted to add some hints.

I use the HP Prime, the TI 89 Titanium and the TI NSpire CX II CAS.

My impressions are:
- The Prime has by far the best hardware. Even very complicated functions are shown in an instant. The memory is huge. The screen the biggest of all three with a good resolution. And it is the only one with touch screen.
The shortcomings are:
The switch between CAS and numeric is annoying. TI does not need this.
The manual is the worst of all three. The index is a bad joke. It is really difficult to find the information needed and sometimes the information is wrong.
- The TI 89 Titanium has by far the worst hardware: Rather slow, small memory, black and white screen with rather poor resolution.
But: It is very reliable, I did not find any bugs.
The manual is the best of all three. All commands are explained in alphabetical order. To find them faster there is a grouped index of them. Rather complete additional index. And it is printed. The others only have pdf-manuals. So it is easy to find all relevant information.
- The TI Nspire CX II CAS: Hardware is between the TI 89 Titanium and the HP Prime, but much nearer to the Prime than to the TI 89 Titanium. It is fast, but slower than the HP Prime, it has a color screen with a good resolution. The memory is much bigger than the memory of the TI 89, but only about 40% of the memory of the prime. The software is reliable, the manual not as easy to use as the manual of the TI 89 Titanium, but it is OK.
The TI Nspire has in my view one big disadvantage: There is no way to download data from a PC to a matrix. In statistics very often the data are needed in a matrix. You can download to the spreadsheet App, but you cannot copy data from a spreadsheet to a matrix. With the TI 89 Titanium and the HP Prime this is no problem. So if you have data on a PC and you want to use them on a TI Nspire in a matrix the only way is typing them.

Concerning the PC applications that come with the calculators there are as well significant differences:
- TI 89 is worst. You can downlod and upload data, upload screens, but there is no complete replica of the software. There are special apps which emulate the TI 89 on a PC but they are not from TI.
- HP Prime is in the middle. It is a comlete replica of the software and you can upload and downlod data. The Pro-version comes with some additional costs.
- TI Nspire in my view is best (with the exception of downloading data) because it is the only one which has a mode with higher resolution. So the bigger screen of the PC can be used. And it is included in the purchase of the calculator without additional costs.