If you could have an alternative C2 rowing App, how would you design it? Now, the wish has come true.

[TheFleXing]

overlaying every one you'd find in PM5 console,

Exactly. The late peaks shown here indicate faulty technique, presumably why C2 bothered to put the force curve on PM in the first place.

I see what you mean, yeah, too late to edit to the correct form(the screenshot took in app-testing). Thanks for pointing out.

Since in rowing we can't do anything except work, indices such as W/rating and m/stroke coud help see if we are.

Noted. So my understanding is having a bar-graph shows work per stroke (unit in Joules). A graph similar to, if you click the upper-right corner while rowing in Rowdio, "Details", there's a graph of stroke rate. Similar display. Let me know if implementing this approach would help.