Yesterday I got trials of Mathcad Prime 11 and Maple Flow 2025, so this is a mini review from someone who doesn't have any skin in the game anymore This is all coming from a retired Mathcad 15 user who was considered the superuser (although all that meant was that I read the manual and browsed the old collaboratory)
General
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Overall, Maple Flow isn't Mathcad 15. If you're conjoined at the hip to Mathcad 15, then Mathcad Prime is your path of least usability disonance. But you have to live with paying every year. That might work for you, bt not for me.
Over two days of doing the same stuff in both, I didn't have a crash in either. But I don't drive "off road"
What Mathcad Prime does better
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Mathcad Prime has the edge in units (type the unit after the number). (In Maple Flow , you need to click on a unit from teh palette or insert a units placeholder with a keyboard shortcut then type the unit. Clunky. That hasn't changed)
"Feels less weighty/complex
What Maple Flow does better
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Some really nice features: Variable tracking. contents table, equation hiding
Moving math around is easier, click anywhere on an equation, hold the mouse button and drag. This is certifiably more diffiocult in Prime (you have to position the mouse over the border, then drag)
The engineering math stuff is deeper, if you're into that sort of thing. Also thermo data sets built
Format scientific notation with x for multiplication e.g. 2 x 10(-3). I can't find how to do that in Prime.
What I didn't like/general
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Mathcad:
Plotting is done in the chart component or a native plot. Two different "apps". Don't give me two ways of doing the same thing. I don't swear much (I was raised presbytarian), but heavens to betsy that's bad design
Subscripts are not a period. It's holding down the shift key then pressing the underscore two times
I hate subscriptions, I really do. That's the single major reason why I recommended Maple Flow over Prime when i was working
Maple Flow:
The Maple Flow Mathcad 15 converter doesn't convert as much as Mathcad Prime Mathcad 15 converter but it might be enough
Subscripts are ctrl+--