Paddock20
One tablet on a steel workbench under a single warm work light, a clean app UI glowing
Custom App Development · Nashville

Custom App Development, Built by the Person You'll Work With.

Most software is built around what already exists. We start from what your operation needs. Custom app development, workflow automation, AI voice agents — scoped in writing before you pay a dollar.

See the price, then book a Fit Call
Ballpark on the call · Fixed price in writing next day
Public Pricing — A Differentiator, So It Stays on the Page

What Does Custom App Development Cost?

Every build is fixed scope, fixed price — published before you call. Deposit 15–25% on projects over $5,000, credited to the final invoice.

TIER 01 — AUTOMATION
Workflow Automation
One or more automated workflows replacing manual copy-paste or disconnected tools. Fixed price, ships in days to two weeks.
$749.99 – $4,999
FIXED · SHIPS IN DAYS
See full details →
TIER 02 — MVP
Rapid MVP
A working, production-quality app that validates your core use case. Real users, real data, real feedback loop.
$5,000 – $7,000
FIXED · 2–4 WEEKS
Get your number
TIER 03 — PRODUCTION
Production App
A full custom application built to run your operation long-term. Scoped in writing, shipped in weeks, maintained after launch.
$9,000 – $12,000+
FIXED · 4–8 WEEKS
Get your number
Starting smaller? MVP development ships a first version from $5,000, and workflow automation starts at $749.99 — both roll cleanly into a production app later.
The Plan — Three Steps, No Mystery Phase

How it works here

01
The Fit Call
Twenty minutes, plain English. You describe how the operation runs today; you get a ballpark on the same call.
02
Fixed scope, next day
The scope and the price arrive in writing the next day. The number you sign is the number you pay.
03
Build and ship
One builder end to end, weekly check-ins you can read in a minute, and a launch measured in weeks.
Proof — Shipped, Running, In Use

Apps we've built and shipped

The first app we shipped now handles $125M+ in monthly vehicle transactions for duPont Registry. Seven more followed — and the same kind of system runs GoTime Motorsports' operation day to day.

DRX Lot Assistant™
LIVE
First app shipped now handles $125M+ in monthly vehicle transactions for duPont Registry.
$125M+ MONTHLY · duPont Registry
SupercarIQ™
LIVE
Exotic-car expertise in anyone's pocket. 5 input modes, sub-second results.
CONSUMER APP · GoTime Motorsports
Paddock Mail™
LIVE
AI-assisted inbox management. Built for ourselves, now in production.
INTERNAL TOOL → PRODUCTION
$125M+
Runs through our software monthly
8+
Apps live in production
100%
Code ownership, yours on delivery
30
Days post-ship support
Common Questions

Common questions

How much does custom app development cost?
Paddock20 builds rapid MVPs from $5,000–$7,000 and production apps from $9,000–$12,000+. Workflow automations start at $749.99. Every price is public before you get on a call.
How long does custom app development take?
Most production apps ship in 4–8 weeks from a signed scope. Rapid MVPs can ship in 2–3 weeks. Timeline is fixed in writing before any work begins.
Do you build mobile apps?
We build web apps that work on every device — desktop, tablet, and mobile. Native iOS/Android apps are not our focus; responsive web apps cover most operational use cases at a fraction of the cost.
What happens after the app ships?
Every build comes with a 30-day revision window. After that, App Care ($500–$750/mo) covers maintenance and uptime. Paddock20 Pass ($999.99/mo) adds monitoring and a 15% member discount on new project work.
Who owns the code?
100%. You own the code, the data, and everything in between. No lock-in, no licensing fees, no dependency on Paddock20 to run your own software.
The Next Step Is a Conversation, in Writing by Morning
One call. A ballpark on the first conversation. A fixed price in writing the next day.
Book a Fit Call
Related Services
MVP DevelopmentEnterprise SoftwareAgentic EngineeringAll Services
The Next Step

Every build starts with a fifteen-minute call.

Describe the problem. We give you a straight answer — either a ballpark and a path forward, or an honest no. You're talking to the builder. No pitch, no pressure.

Book a free fit callScope it with RAIL in 90 seconds
$1.2B+
Enterprise revenue driven before this codebase existed.
$125M+/mo
Moving through a tool we built. Running right now.
1
Architect between your problem and the finished product.
Paddock20Digest. Develop. Deliver.
Paddock20 · Nashville, TN · Bay #20