Starting
Your fixed starting estimate after the 14-question assessment.
TESTOSTERONE TRACKING & OPTIMIZATION APP
Estimate your testosterone. Get a personal daily plan.
Dr. Testo is an iPhone and iPad app. Answer 14 questions to estimate your starting level, get a personal protocol, see future potential, and track your progress. Android is in development.
Download on theApp StoreAvailable now
Coming toGoogle PlayAndroid in development
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.
01Estimate your starting level.02Follow your personal daily protocol.03Track where your habits are taking you.
14questions to get started
5Core habits in your plan
36Advanced factors to explore
365days of projected potential
Inside the Dr. Testo app
From your first estimate to daily progress.
The app guides you through five clear steps.
01 / 05
Estimate your starting level
Answer 14 questions about your body and habits. Get a starting estimate and a personal plan.
02 / 05
Follow your daily protocol
Record sleep, training, diet, and stress. Check in on body composition every 14 days.
03 / 05
See each action’s impact
What Moved Today separates short-term effects from the changes building your long-term Base.
04 / 05
Compare your future potential
See your Core plan beside Core + Added Advanced at five checkpoints through Day 365.
05 / 05
Track progress and milestones
Follow your Base trend, personal best, earned milestones, and the starting blockers you are working through.
Your Home screen
Your starting point. Your trend. Today’s changes.
Home keeps the numbers separate so a single good day is not confused with long-term progress.
Base
Your slower-moving level as repeated habits build over time.
Today
Your current daily view after today’s logged actions are applied to Base.
Your daily plan
Follow five Core habits.
Sleep, resistance training, diet, stress, and body composition form your foundation. Record daily actions in one place; update body composition when a check-in is due.
Sleep DurationCore
Resistance TrainingCore
Diet QualityCore
Life StressCore
Body CompositionCore
Body Composition belongs to Core, with a check-in every 14 days—not a daily task. Alcohol tracking is added when relevant to your profile.
36 Advanced optimizations
Add more options when you want to go deeper.
Explore micronutrients, botanicals, environment, experimental, and support factors. Read each Factor Guide before you add it to your protocol.
The app shows which factors have a direct numerical model and which are included for research or tracking, instead of inventing the same type of score for everything.
Explore features
Need-sensitive inputs with direct rules when profile fit exists.
- ZincDirect model
- Vitamin DDirect model
- MagnesiumDirect model
- BoronDirect model
- SeleniumDirect model
- Omega-3Direct model
- B-ComplexDirect model
Profile-dependent candidates with factor-specific evidence and timing.
- Tongkat AliDirect model
- AshwagandhaDirect model
- FenugreekDirect model
- ShilajitDirect model
- Red GinsengDirect model
Seven exposure-reduction actions inside one shared, capped domain.
- Reduce plastic food contactShared domain
- Replace damaged non-stick cookwareShared domain
- Reduce fragrance exposureShared domain
- Reduce grease-resistant packagingShared domain
- Reduce thermal-receipt handlingShared domain
- Reduce pesticide exposureShared domain
- Reduce occupational solvent exposureShared domain
Early research, with modeled contributions only where the product has a defined rule.
- BetaineDirect model
- D-Aspartic AcidResearch library
- GingerResearch library
- Royal JellyResearch library
- Mucuna PruriensResearch library
- ForskolinResearch library
- PhosphatidylserineResearch library
- L. reuteriResearch library
- PomegranateResearch library
Routine and performance support, separate from direct testosterone effects.
- CreatineSupport only
- MacaSupport only
- TribulusSupport only
- L-CarnitineSupport only
- Cold ShowerSupport only
- SaunaSupport only
- NoFapSupport only
- CaffeineSupport only
Future potential
See what your plan could change.
Compare your Core protocol with the same plan plus the Advanced optimizations you choose, from Day 30 to Day 365.
Illustrative profileCore + added Advanced ng/dL
D0320 ng/dLD30555 ng/dLD60650 ng/dLD90705 ng/dLD180750 ng/dLD365775 ng/dL
Core protocolCore + added Advanced
Illustrative Base historyEstimated testosterone · ng/dL
1Y775Base
BaseStarting
Progress tracking
See whether your long-term direction is improving.
Follow your Base over 1W, 1M, 3M, 6M, 1Y, or All. Keep Starting in view, check your personal best, and see which milestones you have earned.
1W / 1M / 3M / 6M / 1Y / AllBase-only historyRecorded progress
More than a daily number
See the progress behind your Base.
Your history, starting blockers, and earned milestones each answer a different question.
Work through your starting blockers
See the habits flagged at the start and follow their observed improvement. Progress is not a fixed-day countdown.
Keep your earned milestones
Your highest recorded Base sets your personal record and milestones. A lower day does not erase what you reached.
Return without starting over
After a long gap, 21+ Day Update refreshes missing information while keeping your original Starting point and history.
Coming in 1.2.0
Your daily plan, closer at hand.
Preview the companion experience: record on your wrist and check key information from your screen.
Log from Apple Watch
After setup on iPhone, record daily Core answers and selected Advanced actions on your watch. View the latest synced Base, Today, and progress without opening the phone app.
Initial setup, adding factors, and subscriptions stay on iPhone. Automatic Apple Health tracking is not included.
See your day in a widget
Choose Base, Today, Progress, or Protocol views. See your recorded count and open the relevant app screen with a tap.
Widgets display app snapshots; they do not record actions or calculate new results in the background.
The Dr. Testo Method
A personal model built from research, time, and your own actions.
The calculation system separates your starting estimate, long-term change, today’s impact, factor fit, and future scenarios. The app now links 67 publications across 44 covered topics.
67linked publications44covered topics
Local-first by design.
Assessment, calculation, check-ins, protocol, and history stay centered on the device without a custom account dependency.
0114 questions
13 scored inputs + DOB
→02Starting
Fixed origin
→035 Core habits
Personal protocol
→04Base / Today
Long + daily layers
→05D30–D365
Scenario paths
Dr. Testo Learn
Learn what shapes your protocol
Clear guides explain each factor, show the evidence context, and connect reading to the right place inside the product.
Sleep
Sleep and testosterone: what the evidence suggests
A practical look at sleep duration, sleep timing, and why Dr. Testo treats recovery as a core input rather than an isolated score.
Read guideTraining
Resistance training and testosterone: where it fits
Understand why resistance training is always present in Dr. Testo's Required Core and how the app separates action from exaggerated promises.
Read guideStress
Stress and testosterone: tracking a changing signal
See how life stress can be represented as a changing signal and why Dr. Testo distinguishes today's context from a longer-running pattern.
Read guideQuestions
What the product is — and what it is not
01What is Dr. Testo?+
Dr. Testo is a testosterone tracking and optimization app for iPhone and iPad. It estimates your starting level from a 14-question assessment, builds a personal protocol, and tracks modeled direction over time.
02Do I choose my Core actions?+
Five Core habits form the foundation: sleep, resistance training, diet, stress, and body composition. Body check-ins are periodic. Alcohol is profile-dependent; Advanced factors are optional.
03What is the difference between Base and Today?+
Base represents the slower-moving chronic direction. Today adds current, temporary signals on top of Base.
04Does every Advanced factor show a numerical effect?+
No. Only factors with a direct model can show a counterfactual number. Other curated factors remain clearly marked as tracked or unmodeled.
Your estimate, plan, and progress in one app
Start with your level. Leave with a plan.
Dr. Testo brings the assessment, personal protocol, daily tracking, future scenarios, research, and progress history into one mobile app.
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