Derby Party App
Pari-mutuel betting for party
Only for Mac
$49.99
Mac
Host the smartest Kentucky Derby party. Win/Place/Show, Exacta, Trifecta — plus a live Tote Board for guests on a second monitor.
Throw a Derby party that runs like clockwork. Derby Party is the app
for hosting a pari-mutuel betting pool at any horse race — Kentucky Derby,
Preakness, Belmont, Breeders' Cup, Royal Ascot, Melbourne Cup, or any race
you set up yourself.
THE APP DOES THE MATH SO YOU CAN ENJOY THE PARTY
The wizard walks you through six steps:
1. Create or import a race
2. Add the field of horses with their odds
3. Add your party guests
4. Place every bet — Win, Place, Show, Across the Board, Exacta, Trifecta
5. Enter the finishing order
6. Calculate exact pari-mutuel payouts — with the math shown
LIVE TOTE BOARD FOR YOUR GUESTS
Press ⇧⌘T to open a betting board on a second monitor. Guests see live
pool sizes, the crowd favorite, projected payouts per horse, a countdown
to post time, and big "BETS CLOSED" indicator when wagering ends. Drag
it onto any external display.
BUILT FOR THE BUSY HOST
• Fast keyboard-first bet entry (lock the bettor, ⌘↩ to save and start
the next one)
• Print blank bet slips (2 per page) so guests can write their wagers
on paper while you transcribe
• Print a master bet ledger before post time — guests initial each bet,
settling any "I bet on Justify, not Always Dreaming" disputes
• Print a bet types reference handout for guests new to horse racing
• Lock bets at post time (manually or automatically) to keep the record
honest
• "Surprise me!" picks a random horse for guests who can't decide
DATA SAFETY
Every change auto-snapshots to a sandbox-safe location. If anything goes
wrong — accidental delete, app crash, drive failure — File → Restore
from Backup recovers your party from minutes ago. Press ⌘Z to undo
within the session. Save errors are surfaced immediately, never silently
swallowed.
EMAIL EVERY WINNER
After Calculate Payouts, click Email Winners. Each winning guest gets a
personalized email with their bet, the math, the result, and what they
won. Brings the party energy days later.
SIDE CONTESTS
Best Hat, Best Mint Julep, Best Outfit — pick a winner and print a fancy
landscape certificate to hand them.
RACE DATA INCLUDED
The app comes free; race data for major events is sold per-event-year
($4.99 each) as in-app purchase. One purchase unlocks every race on
that day's card. We curate the data for accuracy and update post
positions as the official entries are published.
PARI-MUTUEL MATH, VERIFIED
Payouts are calculated using the same battle-tested algorithm as the
13-year-old DerbyParty iPad app. Every winning bet gets exactly its
fair share of the pool, with optional house cut for fundraisers. The
calculation trace is shown in full so you can prove every dollar.
PRIVACY-FIRST
All data — bettors, bets, results — stays on your Computer in a sandboxed
local database. We collect nothing, transmit nothing, and have no
servers that hold your party data.
REQUIREMENTS
• macOS 14.0 or later
• Optional second display for the Tote Board
• Printer (optional, for paper records)
Created by Larson Development. Support at derbyparty@larsdev.com.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, Larson Development, LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Larson Development, LLC
- Size
- 7.1 MB
- Category
- Lifestyle
- Compatibility
Requires macOS 14.0 or later.
- Mac
Requires macOS 14.0 or later.
- Mac
- Languages
- English
- Age Rating
18+
- 18+
- Frequent
Simulated Gambling
- Copyright
- © Larson Development, LLC
