Fix the foundations. Then build the thing nobody else has.

Brazilian Jiu-Jitsu is one of the fastest growing sports in the world. The strength, mobility, rehab and conditioning layer underneath it is owned by nobody. Content libraries exist. Gym management software exists. Nothing assesses a grappler, tells them where they stand and prescribes what to fix.

Bulletproof for BJJ owns one of the most respected strength and mobility methodologies in grappling. Twelve movement categories, graded white belt to black belt, built over years of coaching athletes who need to stay on the mat rather than in rehab. That standard lived in coaches’ heads and in PDF charts. It was not in the software.

The app delivered good programming to a paying subscriber base, but it could not tell a member where they stood, which program suited them, or whether anything was improving. Underneath that sat a set of practical problems worth solving first. Subscription states did not always reflect what a member had actually paid for across three different app stores. Authentication had bugs at signup that cost users in the first ninety seconds. And the product ran slower than the coaching inside it deserved.

The brief was to do all of it. Stabilise and speed up the platform, build the assessment layer that turns the methodology into the product, and put a commercial strategy around claiming the space before somebody else does.

Plumbing before product

Nothing built on top of an unreliable account or an unreliable entitlement survives contact with real users. So the first work was underneath the waterline: the database structure and data model, the authentication layer, and the subscription system. Unglamorous, invisible in a screenshot, and the reason everything after it holds.

Assessment as the spine, not a feature

The app should know where every member stands before it recommends anything. We treated assessment as the organising idea of the product rather than another item in the menu, and sequenced the roadmap so it landed whole rather than in fragments.

Let the assessment drive the experience

A score on its own is trivia. The value is in what happens next, so the assessment results were wired directly into onboarding and program recommendation. The product stops publishing and starts prescribing.

Instrument it from day one

Assessment only earns its place if the team can see what it does to activation, engagement and retention. Analytics and reporting were built in alongside the feature, not bolted on after launch when the first cohort has already passed through.

Work out where this goes next

Alongside delivery we ran the commercial work: product strategy, roadmapping, market sizing and product market fit research across the fitness app category, the global BJJ practitioner base, the competitive landscape and the adjacent markets worth expanding into. Delivery decisions and commercial decisions were made off the same set of numbers.

Rebuilt foundations

Database structure and design. The data model was rebuilt to support the assessment layer properly, with historical results, timestamps and belt level derivation designed in from the start rather than retrofitted. Separate operational and audit data paths keep the record clean.

Authentication revamp. Social login accounts are no longer offered password resets for passwords that do not exist. Signup codes expire and old ones are invalidated when a new one is requested. Duplicate account creation against an existing identity is caught and routed to login. Profile names and pictures populate correctly, and a member’s own edits take priority over provider defaults instead of being overwritten.

Subscription overhaul. Entitlements are now verified server side against Stripe, Apple and Google rather than trusted from the client, with webhook reconciliation correcting the record on every renewal, cancellation, billing retry and expiry. Every subscription event is logged and auditable, so a billing question has an answer rather than a guess.

Speed and performance. Page load and screen render times were reduced across the highest traffic journeys, so the app opens faster, moves between screens faster, and holds up under a growing member base.

The assessment engine

• Six strength assessments scored on a three rep max, and six mobility assessments scored against a reference video, each resolving to a belt level.
• A Mobility Screener covering ankle, knee, hip, lower back, upper back, wrist, shoulder and neck, scored movement by movement.
• A Personal Bests profile showing a current belt level across all twelve movement categories at once, each with a reassess action.
• History and trend views per movement, so a member sees the line rather than the last number.

Intelligent onboarding and program recommendations

• The Mobility Screener sits at the end of onboarding and feeds a rules engine that reads the results and recommends accordingly.
• A small number of weak movements returns targeted Mobility Turbo Chargers. A broader pattern of weakness returns the Mobility Program and holds the member there until they retest.
• Weak movements surface as Focus Areas on the profile, each with a direct route into the program that addresses them.
• Finishing a program prompts a retest, which re-evaluates Focus Areas and lifts any access restriction automatically. Anyone not ready to test on the spot can schedule it into the existing Journal.

Enhanced dashboard analytics

• Subscription, engagement and error data brought into one reporting view, so product decisions, board reporting and commercial conversations run off the same numbers.
• Assessment completion, activation and retention tracked from launch rather than reconstructed afterwards.

Product strategy and commercial research

• A sequenced delivery roadmap, every story written with testable acceptance criteria and handed over ready for the development team to pick up.
• An explicit, written out of scope list covering gamification, the personalisation engine, AI exercise suggestions and the community platform migration, so the assessment work could land first rather than compete with half built features.
• Market sizing and product market fit research across the fitness app category, the global BJJ practitioner base, subscription and retention benchmarks, the competitive landscape and the adjacent markets worth expanding into.

The product is faster, the foundations are sound, and the thing that makes Bulletproof different is now inside the software rather than alongside it.

Uplifted performance

Faster load times, fewer authentication failures at signup, and subscription entitlements that reflect reality across all three stores.

A product that prescribes rather than publishes

A member finishes onboarding knowing their belt level across twelve movement categories and exactly which program to start.

Years of coaching IP turned into product logic

Expressed as scores, belt levels, Focus Areas and a reassessment loop that brings members back.

A claim on ground nobody else holds

In one of the fastest growing sports in the world, Bulletproof now owns the assessment layer for strength, mobility and conditioning.

A foundation to build on

Gamification, personalisation and community are now additions to a stable platform rather than features competing for space on an unstable one.

Assessment launches to the Bulletproof member base in October 2026.