A fast, native Mac spreadsheet that automates with real Python — not VBA, not macros trapped in the cloud. Works fully offline. Your data never leaves your Mac. Buy once, yours forever.
Every spreadsheet has that one tedious job — reformat, recompute, re-flag, repeat. In FastSheet you write it once, in real Python, and run it over your cells. No VBA to relearn, no add-in to install, no cloud runtime.
The macro editor speaks the whole language — loops, functions, the standard library — over a simple Cell / Range object model. It runs instantly, on your machine, against the sheet in front of you.
Import math, datetime, re, json — write the transform the way you'd write it anywhere else.
# Build the month-end summary and colour the misses red import datetime targets = {"EU": 50000, "US": 40000} today = datetime.date.today() for row in Range("A2:C50"): zone, sales = row["C"], row["B"] if sales < targets.get(zone, 0): row.fill("#ffd7d7") # missed target row["D"] = f"short by {targets[zone] - sales:,}" Cell("F1") = f"Closed {today:%b %d}"
Real Python over your cells — loops, functions, the whole standard library. The report you rebuild every week becomes one command.
~150 functions — statistics, matrices, distributions, pivots, charts. Opens and saves .xlsx with live formulas in both directions.
No account, no subscription, no cloud. It runs on your Mac and stays there — the only thing that ever leaves is a file you choose to share.
An incremental engine recomputes only what changed, so big sheets stay fluid — and when your data outgrows cells, FastSheet queries real database files in place.
A small native app — no Electron, no Java. The grid windows thousands of rows so scrolling never stutters, and the incremental engine recomputes only the cells that depend on your edit — so a change lands in about five milliseconds, even with hundreds of live formulas open.
Link a CSV or database file and query it live with DBSUM, DBLOOKUP, DBAVG, DBCOUNT — backed by a real SQLite engine, no import step. Edit the source, hit refresh, your sheet updates. A spreadsheet that talks to a database.
It won't replace Excel for everyone, and it doesn't try to. It's for people who want a fast native spreadsheet they can script — and own.
| FastSheet | Excel 365 | Numbers | Google Sheets | |
|---|---|---|---|---|
| Price | $19 once · first 100 | ~$100 / year | Free | Free |
| Scripting | Python | VBA | — | Apps Script (JS) |
| Works offline | Yes | Partial | Yes | No |
| Data stays local | Always | Cloud-linked | Yes | Cloud |
| Reads / writes .xlsx | Yes | Yes | Import/export | Import/export |
Fourteen days free, fully unlocked, no card. Then one payment keeps it forever, with a year of updates — no renewals, no seats, no cloud login. The first 100 buyers pay $19 instead of $39; in return, you get my ear — email bugs and ideas straight to feedback@fast-sheet.com and help shape v1.
Does it open my Excel files?
Yes — .xlsx in and out, with live formulas both directions. Edit a cell and dependent formulas recompute, in FastSheet or back in Excel.
Is my data uploaded anywhere?
Never. FastSheet is fully offline — your files stay on your Mac. The only time it touches the network is the one-time licence unlock when you buy.
Is it a subscription?
No. Buy once. A year of updates is included, and the version you bought keeps working forever, offline.
What language are the macros?
Python — the real thing, with the standard library. Not VBA, not a cloud runtime. Runs instantly on your machine.
Which Macs does it run on?
Apple Silicon and Intel, as a native app. No Rosetta, no Java, no Electron bloat — one small download.
What if it's not for me?
The 14-day trial is fully unlocked — you'll know before you pay a cent. And there's a refund window on every purchase.
macOS 12+ · Apple Silicon & Intel · ~20 MB · notarised by Apple