Backed by 200+ studies
The Pareto Principle, applied to your body.

The 20% of fitness that
generates 80% of the results.

Gym. Running. Nutrition. Recovery. Only what the science says works.

Join the Waitlist

Get Pro free for a month when we launch — limited spots

200+
Studies
34 min
Avg. session
5
Domains
Progress
Your 20%
This week
Squat 1RM+12%
Weekly Volume+8%
Consistency87%
RecoveryOptimal
Today
Progress
Profile
Tuesday, Feb 21
Today's 20%
Ready
Strength + Run
Full body · 34 min · 4 exercises + zone 2
Barbell Squat3×8
Romanian Deadlift3×10
Overhead Press3×8
+ Zone 2 Run · 20 min
Start Workout
Today
Progress
Profile
Active
Barbell Squat
Set 2 of 3 · 8 reps · 185 lbs
Completed Sets
3
Up Next
Romanian Deadlift · 3×10
1:42
Rest Timer
Today
Progress
Profile
Synthesizing research from top institutions
Harvard Menu Labeling Research
McMaster Protein Studies
Johns Hopkins Nutrition Science
ISSN Creatine Position Stand
Schoenfeld Hypertrophy Meta-Analysis
Seiler Polarized Training Model
Harvard Menu Labeling Research
McMaster Protein Studies
Johns Hopkins Nutrition Science
ISSN Creatine Position Stand
Schoenfeld Hypertrophy Meta-Analysis
Seiler Polarized Training Model
ACE Exercise Prescription
NSCA Periodization Research
Walker Sleep Meta-Analysis
Huberman Recovery Protocols
Helms Nutrition Reviews
Israetel Volume Landmarks
ACE Exercise Prescription
NSCA Periodization Research
Walker Sleep Meta-Analysis
Huberman Recovery Protocols
Helms Nutrition Reviews
Israetel Volume Landmarks
0
Peer-reviewed studies
synthesized
0 min
Average session
length
0
Science-backed
domains
0%
Report progress
in 4 weeks

Too much noise.
Not enough signal.

We analyzed over 200 peer-reviewed studies to build a single, cohesive plan matched perfectly to your goals. No generic AI BS.

AI

AI-Powered Progressive Overload

Progressive overload is the single most supported principle in strength science. Twentify auto-adjusts your sets, reps, and load every session — so you never plateau and never guess.

Squat Volume ↑ +12%
Recovery Optimal
Next Load +5 lbs
2T

2-Tap Start, Zero Guesswork

80% of elite training is low intensity. Your plan is already built — open, tap, go. The science is pre-applied.

Ready to train
Start Workout
Ci

Every "Why" Is a Citation

Tap any recommendation in your plan to see the peer-reviewed study behind it — no black-box advice.

Schoenfeld et al. 2017
"10+ sets per muscle group per week produced significantly greater hypertrophy than lower volumes."
DOI: 10.1519/JSC.0000000000002200

Pick your domains.
We handle the science.

A precise stacking architecture designed to unify your life.

01
Step 01

Pick Your Goal

Answer 5 precise questions. Select your focus domains: Hypertrophy, Longevity, Performance. Done in 45 seconds.

Gym
Running
Nutrition
Sleep
Recovery
02
Step 02

We Build The Plan

200+ studies distilled instantly. Program, macros, tracking — dynamically generated and fully cited.

Full Body Strength
3x/week · 34 min avg · Progressive
Barbell Squat3×8
Romanian Deadlift3×10
Overhead Press3×8
Zone 2 Run20 min
03
Step 03

Do 20%. Get 80%.

Follow today's optimized plan. Close the app. Live your life. We adapt tomorrow based on today.

M
T
W
T
F
S
S
Today's 20%
Strength + Run · 34 min

Free works.
Pro adapts.

Essential
The 80/20 essentials
$0/mo
  • Science-backed plan
  • Guided daily sessions
  • Basic tracking
Join the Waitlist
Most Popular
Performance
Your 80/20, dynamically personalized
$9.99/mo
  • Everything in Free
  • AI adaptive programming
  • All 5 domains unlocked
  • Cross-domain optimization
Start 7-Day Trial

Be the first to
train smarter.

Join the waitlist and get Pro free for your first month.

Free Pro month at launch
Limited spots
Science-backed

Join the Waitlist

Enter your details and get the Pro version free for one month when we launch.

Limited offer — free Pro access for the first month after launch.