Personal state
Fourteen questions capture thirteen scored inputs plus date of birth for factor state, age context, and the immutable Starting origin.
HOW THE CALCULATION WORKS
How Dr. Testo turns your answers into a personal testosterone model
The Dr. Testo Method connects your starting profile, research-linked factors, time-aware calculations, and recorded actions to one protocol and progress system.
INPUTRESEARCH MAPTIME-AWARE MODEL 0.50.0ACTION
App preview · 1.2.0These screens preview version 1.2.0, currently in App Review. Version 1.1.0 is available now; Apple Watch support is coming with the update.
14questions to get started36Advanced factors to explore67Scientific Sources inside the app0.50.0bundled-45
Inside the calculation
Layered math, without a black-box score
The exact coefficients stay protected, but the logic is visible: what enters, how it changes over time, where limits apply, and which scenario is being compared.
Change, not double count
Core movement is measured against the onboarding state rather than awarding the same association twice.
Factor-specific time
Sleep, body composition, stress, botanicals, and environment can adapt at different speeds.
Fit, caps, and headroom
Evidence, estimated fit, shared limits, and remaining modeled room constrain each contribution.
Named scenarios
Compare the same Core plan with and without the selected Advanced factors. Both use the same model and time checkpoints.
Model flow
Inputs move through defined layers
The calculation core is deterministic and versioned. Product rules, evidence mappings, adaptation, and scenario choices are kept separate so the same input does not quietly count twice.
Assessment state
The required questionnaire establishes the initial factor state and Starting point.
Chronic adaptation
Longer-term adherence moves Base gradually toward the internal equilibrium direction.
Daily signals
Current inputs contribute to the Today view without rewriting the historical Starting point.
Scenario paths
Compare the same Core plan with and without the selected Advanced factors. Both use the same model and time checkpoints.
03Today is relativeACUTE
02Base is adaptiveADAPTIVE
01Starting is historicalFIXED
Three public values
Starting, Base, and Today are intentionally different
Starting is historical
Created once at activation and preserved across future model epochs.
Base is adaptive
Moves with chronic state, adherence, and time — not with every isolated check-in.
Today is relative
Shows acute signals around Base for the current local day.
Scientific Sources inside the app
The research is connected to the screen where you need it.
The current app links 67 publications across 44 topics. Home explains the reference scale, Protocol Potential groups the sources behind the active protocol, Progress connects research to the trend view, and every Advanced Factor Guide shows its own evidence.
67Scientific Sources inside the app44The Dr. Testo Method
Projection logic
Scenarios are comparisons, not promises.
Protocol Potential compares Core with Core + Added Advanced at Day 30, 60, 90, 180, and 365. Both start at your current Base and use the same Core assumptions, including body composition. Only selected, modeled Advanced factors add a difference. With none added, the paths match. Home’s Maximum Potential is a separate best-case view; Progress shows recorded Base history.
Illustrative profileCore + added Advanced ng/dL
D0320 ng/dLD30555 ng/dLD60650 ng/dLD90705 ng/dLD180750 ng/dLD365775 ng/dL
Core protocolCore + added Advanced
Reference context
A shared scale makes position legible.
The product uses a harmonized 264–916 ng/dL healthy reference band for non-obese men aged 19–39 as a benchmark context. It is not presented as a universal laboratory range or a personal maximum. The visual display extends to 1100 ng/dL.
Product display scale0–1100 ng/dL
02649161100
Healthy reference benchmark
Versioned and inspectable
The model can evolve without silent rewrites.
The accepted numerical baseline, bundled configuration, schema, and source checkpoint are recorded separately. A new product model requires a new version, regression checks, simulations, and explicit acceptance — not a hidden marketing adjustment.
Use the model to choose direction; use your history to see what happened.
Dr. Testo keeps projected scenarios and recorded progress side by side without pretending they are the same kind of evidence.
Get Dr. Testo
Download on theApp StoreAvailable now
Dr. Testo is available now for iPhone and iPad. Android is in development.Coming toGoogle PlayAndroid in development