A calculator with a tape for Mac, running inside the launcher.
Type 20% of 1500 and 300 is on screen before you reach the last digit. Return puts it on the clipboard, the panel stays open, and the sum joins a running tape above the field that you can scroll back through, walk with the arrow keys, and copy any line out of. That is the whole pitch: a calculator with tape on the Mac that never becomes a window you have to find, move and then close.
Why a calculator with tape, and when Spotlight is enough
Most sums are four seconds of thinking wrapped in thirty seconds of logistics. You want 1,240 × 0.28, or 18% of a bill, or what is left after three deductions. The arithmetic is trivial; finding somewhere to do it is not. Calculator.app sits behind a search and then a window that lands on top of your work.
So people improvise — the address bar, a message to themselves, whatever spreadsheet is already open. None of that is where the number needs to end up, and none of it keeps a record. That last part is the quiet cost. Three sums into a rough estimate you have forgotten what the second one was, and there is nothing to scroll back to, so you do the whole run again. A calculator tape is the fix people used on desktop adding machines for eighty years: print each line as you go, and the working stays visible.
A calculator with tape on Mac, kept inside a launcher panel, drops the logistics and the amnesia at once: the hotkey you already press, the expression, the answer, Return. The number is on the clipboard, the line is on the tape, and you are back in the sentence you were halfway through.
Be clear about the floor, though. Spotlight does basic arithmetic and is already on your Mac; macOS ships Calculator.app with a scientific keypad and a paper tape of its own. If you do two sums a week, that is your answer. What follows is the case for a running tape kept in a launcher: it takes the expression the way you would say it, keeps the session's working in front of you, and hands the result to whatever you do next.
The tape, and everything this calculator understands
The grammar, spelled out
Plus, minus, star, slash, ^ for powers, and mod. Multiplication and division bind tighter than addition, and mod sits with them, so 10 mod 3 + 1 is 2. Powers are right-associative: 2^3^2 is 512, not 64. Parentheses, square brackets and braces all group — [2+3]*4 is 20. A lone x multiplies, so 2x3 is 6, while xcode still finds Xcode. ×, ÷ and − are accepted, commas in 1,000,000 are ignored, and a trailing = just means evaluate.
Percentages in the four shapes people use them
25% on its own is 0.25. 20% of 1500 is 300. 1500 + 10% is 1650 and 200 - 10% is 180 — the percentage is taken of the left-hand side, which is what you mean when you add tax or take off a discount. 50 * 10% is 5, and 200 / 10% is 2000. One symbol, four meanings, decided by where it sits in the line.
Functions, constants, factorials
sqrt, cbrt, abs, exp, ln, log, log2, log10, the six trig functions, round, floor and ceil, each taking one argument in brackets; log is base ten and ln is natural. pi, π, tau and e go anywhere in an expression. Factorial is postfix or a function — 5! and fact(5) both give 120 — capped at whole numbers up to 170. Where the maths has no answer, Coco returns none: 1/0, 10 mod 0, sqrt(-1) and ln(0) yield nothing rather than a NaN.
The running tape, and the answer you just got
Every Return appends the calculation to a tape above the field: newest first, six rows visible, scrolling beyond that, capped at a hundred. The expression and its result sit on the same line, so the tape reads as working rather than as a list of orphaned numbers. ↑ walks back through it, ↓ walks forward and then releases you to the live expression, Esc clears the selection before it closes the panel, and ⌘Return copies the highlighted row. Double-click a line and its expression drops back into the field, ready to edit and run again — which is what you want when the third figure in an estimate turns out to be wrong. The last answer stays live in the grammar too: write ans * 2, or just type + 5 and it continues. A leading minus is a fresh negative, so -5 + 3 is -2.
What the card shows, and what Return copies
What you typed sits on the left, the result large on the right, with the hint row ↩ copy · ↑↓ history beneath. It updates on every keystroke, mid-expression included: a half-typed 1+ shows 1, 1+1* shows 2, and sqrt(2 is closed for you. Results are grouped for reading and plain for pasting — 1,000,001 on screen, 1000001 on the clipboard — to eight decimal places with trailing zeros trimmed, so 1 / 3 reads 0.33333333. Past 1e15 or below 1e-9 it turns scientific: 2^50 is 1.1259e+15.
A calculator with tape on Mac, next to Spotlight, Raycast and Alfred
None of this is exotic; every Mac calculator app on this list does arithmetic. What splits them is whether the working survives the answer. Spotlight does basic arithmetic, costs nothing, and forgets. Raycast has a calculator in its free tier with a short history, and Pro at $8 a month for other things. Alfred's is part of the Powerpack, around £34 as a one-time licence. macOS still ships Calculator.app, with a keypad and a printable paper tape Coco does not reproduce. If you want a Spotlight calculator alternative only because Spotlight will not take the expression you keep giving it, any of these will do.
Coco argues for something narrower: one panel where the expression, the tape and the clipboard are the same surface, so a sum is never a detour. Currency and unit conversion live in that field too and have pages of their own. The limits, plainly: no hex or binary, no bitwise operators, no variables beyond the last answer, no date arithmetic, and a tape that goes when the panel hides. If you need any of those, Calculator.app or a dedicated app is the better tool.
| Coco | Spotlight | Raycast | Alfred | |
|---|---|---|---|---|
| Arithmetic in the launcher field | Powerpack | |||
| Ships with macOS | ||||
| Running tape of the current session | Partial | Partial | ||
| Double-click a tape line to edit and re-run it | Partial | |||
| Typing + 5 continues from the last answer | Partial | Partial | ||
| 20% of 1500 and 1500 + 10% in one field | Partial | Powerpack | ||
| Factorials, log2, mod, tau | Partial | Powerpack | ||
| One-time price, no subscription tier | ||||
| Price | $49 once | Included | Free or $8/mo | £34 once |
Doing arithmetic in Coco
Press the hotkey and start with a digit
There is no calculator mode to enter. The moment what you type reads as maths, the panel switches to the calculator card and app results step aside. macOS 14 or later, Apple Silicon.
Press Return to take the number
Return copies the plain result — no thousands separators — shows a Copied toast, and leaves the answer in the field with the cursor at the end. Carry on typing / 12 and it goes from there; the panel stays open.
Scroll the running tape when you lose your place
This session's calculations sit above the field, newest first, six rows at a time and scrolling past that. ↑ and ↓ walk them, ⌘Return copies the highlighted row, and a double-click drops its expression back in the field to edit and run again.
Clear it by clearing the field
Emptying the search field ends the session and the tape goes with it, as it does when you hide the panel. Nothing is written to disk.
Questions people actually ask
- Is there a calculator with a tape for Mac?
- Two, in different shapes. macOS ships Calculator.app, whose Paper Tape window (⌘T) records the session and can be printed or saved — the right tool if the tape is a document you need to keep. Coco is the other shape: a calculator with tape that lives in the launcher panel, so the tape is above the search field rather than in a second window. Every Return adds a line, newest first, six rows visible and scrolling past that, up to a hundred. You walk it with ↑ and ↓, copy any line with ⌘Return, and double-click a line to put its expression back in the field and re-run it.
- What is the best calculator app for Mac?
- It depends what you do with it. macOS already ships Calculator.app, with a scientific keypad, unit conversion and a printable paper tape, and Spotlight evaluates basic arithmetic without opening a window at all. For occasional sums that is genuinely enough and costs nothing. A launcher-based Mac calculator app such as Coco is for the other case: many small calculations a day, each interrupting something else. There you want the expression typed in one go, the answer as you type, Return putting it on the clipboard, and a tape to scroll back through.
- How do I do a quick calculation on a Mac without opening a window?
- Type it into a search field that evaluates it. In Coco you press the hotkey and start typing: 1240 * 0.28, 20% of 1500, sqrt(2) + 1. The calculator card takes over the panel and the number updates on every keystroke — including while the expression is incomplete, so 1+ shows 1 and sqrt(2 is closed for you. Return copies the plain result and shows a Copied toast, and the panel stays open so you can keep going. Nothing about the sum leaves the machine: the parser is local and there is no request.
- Is Coco a good Spotlight calculator alternative?
- It is a Spotlight calculator alternative in one specific sense: it takes longer expressions, keeps the working, and does something with the result afterwards. Spotlight evaluates a sum and shows it. Coco evaluates as you type, copies on Return, keeps a scrollable tape of the session, and lets the next expression continue from the last answer if you start with an operator — after 102, typing + 5 gives 107. If your sums are one operator long and the answer never goes anywhere, Spotlight is free and already running; use it.
- Is there a calculator in the menu bar on Mac with Coco?
- Not as a keypad or a permanent readout. Coco has an optional menu bar icon, and its menu opens the panel, the clipboard, Favourites, Launchpad and settings — it shows no running total and no buttons. If what you want is a calculator in the menu bar on Mac that is visible at all times, a small dedicated app does it better. Coco's bet is the opposite one: the calculator is a hotkey away the moment you want it, and takes no screen space when you do not, which is most of the day.
- How long does the calculator tape last?
- For the length of the session, and no longer. Each committed calculation joins a tape above the field — newest first, six rows visible, scrolling past that, capped at a hundred entries. ↑ and ↓ move through it, ⌘Return copies a highlighted row, and a double-click puts that row's expression back in the field so you can edit it and run it again. The tape is held in memory only: it clears when you hide the panel or empty the field, and nothing is written to disk. For calculations kept over weeks, Calculator.app's paper tape or a notes file is the right place.
- What does it cost, and what does it run on?
- Seven days free with no card and no account, then $99 once for one Mac, currently $49 at the launch price. It is a one-time purchase rather than a subscription: no renewal, no seat that expires under you, no periodic check-in to strand you offline. Updates within this major version are included, there is a 14-day refund with no questions asked, and you can move the licence to another Mac yourself. For comparison, Raycast Pro is $8 a month and Alfred's Powerpack is around £34 once. Coco needs macOS 14 or later and Apple Silicon, and the calculator is part of the app, not a paid add-on.
Copy the prompt, or send it straight to the AI you already use — it drives Coco through the same commands you would type yourself.
Install the Coco skill (npx skills add butterflydream-ai/Coco --skill coco -g -y), then use coco to help me with A calculator with a tape for Mac, running inside the launcher..