I don't mean this as a knock on OP, but it's not a new idea — I think the best known apps in this category are Soulver and Numi.

I find them super useful. Using natural language and storing the context along with the calculations helps me to sort of think through problems.

Being able to define variables on the fly is also very useful — I often use them for pricing out materials for projects. E.g.:

  "8ft 4 × 4" = $15
  "8ft 2 × 4" = $4
  "8ft 2 × 8" = $12
  "8ft 2 × 6" = $6.50
  "3/8in x 8in carriage bolt" = $3.50
  
  Adjustable stand
  "8ft 4 × 4" × 4
  "8ft 2 × 4" × 2
  "3/8in x 8in carriage bolt" × 12
  Plans $12

(What you can't see here is that Soulver gives all the totals in a bar on the right).

Soulver has some examples of other uses on their homepage: https://soulver.app

This is intentional, even if unexpected, as shown in line 152 of the link (turn on line numbers in the settings menu). I agree that following PEMDAS would make more sense.

Edit: it's the equation below "Although if you want to find roots higher than 3..."

The interface looks great.

Handling of "to" is a bit odd though.

150 kn in km/h [277.79976 kph] - this is unit convertion

150 kn to km/h [-276.79976 kph] - this is unexpectedly subtraction. I expected the unit conversion here, because of Raycast and Google

That's pretty nice; I've made a few attempts at such things myself, but the UI flow seems pretty smooth.

What's the license? I wouldn't want to use your code if copyright law poses a threat.

How do I do get the right result when trying: 200Mbps * 2hours? I get "400 Mbits/s hr" and that's not what I'm looking for. It seems to be working if I use seconds instead. 200Mbps*2s=400 megabits

Unfortunately doesn't support superscripts 6²

Also is it possible to use CRDT as rich undo history, not only syncing?

Mate this is a show HN post, not a "recommend me something" post. Don't be rude.