On the Fly In the making

For bar owners, managers, bartenders
and home mixologists

Good things
take time.

A collection of cocktails, including a spritz, an old fashioned, a martini with an olive, and a coupe, beside an On the Fly coming soon ticket and napkin.
Verified recipes
390+
Spirit profiles
380+
Beers, wines & RTDs
310+
Lab techniques
9

On the Fly is a mobile spec book and service workspace for everyone who loves great drinks — behind the bar or at home.

What’s on the menu

One app for the whole bar, front to back.

Swap the binder, the spreadsheet and the group chat for one tool, built around real, verified recipes and spirit facts.

The Beers menu in edit mode, where an owner switches each beer on or off the menu.

For owners

Set up the bar your way.

  • Choose which beers, wines and RTDs your bar carries
  • Owner, admin and staff roles, so everyone sees just what they need
  • Cost and margin for each drink, priced from your own inventory Coming soon
  • Live inventory your whole team keeps up to date Coming soon
  • Analytics on what your bar makes and stocks Coming soon
The quiz builder writing a multiple-choice question from the bar’s own Daiquiri recipe.

For managers

Train faster and keep everyone on spec.

  • Upload a PDF or photo of your menu to turn it into editable recipes
  • Build quizzes from your own specs, assign them and track results
  • Shift notes and an 86 list for everyone on tonight
  • Invite your team with a link or QR code
The Negroni spec card, with its ingredients, glass, garnish and a scaler for one to six drinks.

For bartenders

Every answer, mid-shift, in one search.

  • Search every recipe by name or ingredient
  • See exactly what changed in a spec, like “Lime 1 oz → ¾ oz”
  • Scale batches and syrups to any size, in the units you use
  • Guides and calculators for clarifying, fat washing, sous vide and more
The Classics menu, listing the Aviation, Bee’s Knees, Clover Club and more with their illustrations.

For home mixologists

Make bar-quality drinks at home.

  • Classics, tiki, shots and hundreds more drinks
  • Save your own house recipes alongside them
  • Learn your spirits and wines from hundreds of profiles
  • Study with flashcards and practice quizzes, in English or Spanish

Save your seat at the bar.

We’re opening to bars and home mixologists soon. Join the list and we’ll email you the day it’s ready.