Can the calculator convert currencies?

No. It handles math and units, such as “5 km to miles”, but not currency.

In the PerchDeck dock

A calculator you type to

Type a sum the way you would say it. The answer shows as you type, Enter keeps it in the history, and you carry on from it.

One-time purchase. A license key unlocks every tool, and there is no free trial.

Plain-words math
“15% of 240”, “200 + 10%” (= 220), “5 km to miles”, “sqrt(144)”, “2^10”, “20 degC to degF”, plus a tap keypad.
A history you can reuse
“ans” is the last answer. The history keeps the last 200 sums; copy an answer or reuse a sum.
Locked down
The engine is the math library mathjs with scripting turned off. A sum can be up to 1,000 characters.

They work in any app. Change any of them in Settings > Shortcuts.

Limits and defaults, stated plainly.

It handles math and units, but there is no currency conversion anywhere in PerchDeck.

Thirteen everyday tools, one hover away. A one-time purchase, with no account.