I would personally prefer is apps used this instead of being monetized by ads or IAPs. But this is only feasible if the developers program their apps to run the equations sparingly, so their customers' batteries doesn't drain in a couple of minutes, and so our phones batteries' lifespans doesn't reduce more than they should.
Ads are horrible. They are annoying, and they affect parts of out brains that we have no control over; they cost us more than we think. IAPs are definitely better, but developers seem to abuse them so much that they become obtrusive. That's why I think this sounds like a good idea in theory, but greedy developers will probably abuse it too much.
Then there's of course the issue with Apple letting developers do this.
Ads are horrible. They are annoying, and they affect parts of out brains that we have no control over; they cost us more than we think. IAPs are definitely better, but developers seem to abuse them so much that they become obtrusive. That's why I think this sounds like a good idea in theory, but greedy developers will probably abuse it too much.
Then there's of course the issue with Apple letting developers do this.