We design & engineer
Product, interface, and the systems underneath — built in-house so the details are ours to get right.
Software studio · Est. Florida, USA
We build focused software.
OffByOne LLC is a small studio in St. Petersburg, Florida. We design and ship a short list of apps we believe in — starting with RecompFit.
What we do
A studio, not an app factory.
We take a small number of products seriously — real math, real design, and a maintained roadmap — rather than shipping many and abandoning most.
We run what we ship
Our apps are live services with billing, accounts, and support — operated under OffByOne LLC.
We stay small
A short catalog we can support properly, with room to add the next app when it earns a place.
Products · zero-indexed, naturally
What we make.
Every product OffByOne LLC builds and operates. The list is short on purpose.
RecompFit
Live on web FlagshipA training & nutrition app for body recomposition — lose fat and build muscle at the same time, with coach-grade math and rules first, AI only when you ask. It’s also a storefront where coaches and creators sell programs and monthly coaching memberships.
The next one
In the workshopWe’re a studio, so this list grows. New OffByOne apps land here as they ship.
Company
Who we are & how to reach us.
OffByOne LLC is a registered Florida limited liability company. Everything we ship — accounts, billing, and support — operates under this entity.
Registered office
legal_name
OffByOne LLC
address
7901 4th St N, Suite 300
St. Petersburg, FL 33702
United States
St. Petersburg, FL 33702
United States
jurisdiction
Florida, USA
Contact
email
support@offbyonellc.com
on the web
offbyonellc.com
response
We read every message and reply personally.