A killer app is software so useful or compelling that people buy the hardware to run it. In Paul Thurrott’s account, VisiCalc was the first example: its arrival on the Apple II gave buyers a practical reason to own a personal computer and helped recast computers as tools for everyday work.
What does “killer app” mean?
The phrase describes software that helps sell its host platform. It can define what a device is for, or give prospective buyers a reason to choose that device over alternatives. The term is retrospective in VisiCalc’s case: Thurrott says the spreadsheet appeared almost a decade before “killer app” came into use.
| # | Preview | Product | Price | |
|---|---|---|---|---|
| 1 |
|
The Apple II Age: How the Computer Became Personal | $16.07 | Buy on Amazon |
| 2 |
|
The New Apple II User's Guide | $29.96 | Buy on Amazon |
| 3 |
|
Inside Macintosh, Vol. II | $5.85 | Buy on Amazon |
| 4 |
|
Sophistication & Simplicity: The Life and Times of the Apple II Computer | $50.40 | Buy on Amazon |
As an Amazon Associate I earn from qualifying purchases.
That chronology, and the label “first,” are Thurrott’s historical framing; the account does not independently establish when the phrase was coined or compare every earlier candidate.
Quick wins for a faster PC:
Repair Windows errors before they cause bigger problemsFix Now →Scan for outdated or missing drivers - takes under a minuteDriver Scan →Why VisiCalc mattered
VisiCalc was an electronic spreadsheet created by Dan Bricklin and Bob Frankston. Thurrott identifies it as the first killer app because it made a personal computer valuable for a concrete task: working with spreadsheet data. Instead of buying a computer simply to experiment with computing, a customer could buy one to use VisiCalc.
#1 Best Overall
Thurrott recounts meeting Bricklin in November 1998 while waiting for a Bill Gates keynote in Las Vegas. In the essay, he identifies Bricklin as the inventor of the electronic spreadsheet and VisiCalc’s co-author. The encounter is Thurrott’s recollection, not a separately verified interview transcript.
Why VisiCalc is associated with the Apple II
VisiCalc’s first release is associated with the Apple II, one of several personal computers released in 1977. Thurrott also names the Commodore PET 2001 and Tandy TRS-80 as computers from that year.
Rank #2
Thurrott characterizes the Apple II launch as an accident of history, rather than a result of a unique Apple capability. In his account, Bricklin and Frankston could have released VisiCalc on another computer of the day. That is an interpretation in the essay, not proof that the program would have worked identically on every contemporary machine.
Other examples of software defining a platform
Thurrott’s examples show that a killer app can sell hardware directly or reveal a platform’s distinctive capabilities.
Rank #3
| Example | Connection to the platform | Role in Thurrott’s account |
|---|---|---|
| VisiCalc on the Apple II | Thurrott says the spreadsheet did not depend on a unique Apple II capability. | Software that gave people a reason to buy a personal computer. |
| Desktop publishing on the Macintosh | Associated in the essay with Adobe PostScript and the first commercial laser printer. | An example of software and related technology helping establish a platform’s use. |
| Video Toaster on the Commodore Amiga | The Video Toaster was a genlock hardware add-on; Thurrott describes it as relying on an Amiga hardware quirk. | An example in which a platform-specific hardware capability enabled an application. |
The accessible essay also begins to name Super Mario Bros. as a video-game killer app, but its text ends partway through that example. It does not provide enough detail there to characterize the game’s platform impact further.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What the examples show—and what they do not
“Killer app” is a role rather than a software genre. VisiCalc’s significance, in Thurrott’s account, is that it made a general-purpose computer useful for a task people could recognize. The Macintosh publishing example links software to complementary printing technology, while the Amiga example emphasizes specialized hardware.
These cases illustrate different routes to platform adoption; they do not establish a universal test for how much a single application contributed to hardware sales. Thurrott’s September 24, 2026 essay is the source for this interpretation, and the available text is labeled Premium and ends during its game-console discussion.
Recommended Free Tools
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
