Stop guessing.
Start knowing.
Tendrix ties your supplement stack, workouts, and progress together — then surfaces the correlations that explain your results. Built for serious lifters who want to know what is actually working.
Free to join. No spam. Founding member pricing locked in at signup for the first 500 members.
Your tools don't talk to each other.
You are managing your stack in one place, your workouts in another, and your progress photos in a third. The result is you have no idea which of the things you are doing is actually working.
Supplements tracked in your notes
No timing intelligence, no conflict detection, no way to know if your stack is actually optimized or if half of it is canceling the other half out.
Workouts siloed from everything else
Your strength data lives in a tracker that has no connection to your supplement consistency, your recovery scores, or your body composition changes.
Progress photos with no system
Different angles, different lighting, different distances every time. Week 12 versus week 1 comparisons that tell you nothing because nothing was standardized.
Tendrix connects all three. Then it tells you what the data means.
Everything in one place. Finally.
Four interconnected pillars. Each powerful on its own. Together they show you what no other app can.
Supplement Stack Manager
Build your full stack with doses and timing — including peptide protocols with cycle tracking and reconstitution notes. Daily check-offs with streak tracking. An in-app supplement library that explains what the research actually says — optimal dosing, evidence ratings, common myths debunked. Automatic conflict and synergy analysis flags what is competing for absorption and what works better together.
Training Logger and Programs
Pre-built evidence-based programs loaded and ready to go — PPL, Upper/Lower, Full Body, and more. Log lifting sessions in real time with previous session numbers visible as a reference. Progressive overload detection flags exercises ready for a weight increase. Strength progress charts and weekly volume breakdowns by muscle group. Log cardio sessions alongside your lifting — running, cycling, rowing, incline walking, and more — with duration, distance, and effort level tracked and fed into the correlation engine.
Structured Progress Photos
A silhouette overlay system ensures every photo is taken at the same angle, the same distance, and the same framing — every single session. Side-by-side slider comparison between any two dates. Week 1 versus week 12 comparisons that actually mean something because the methodology was consistent from day one.
Weekly Correlation Insights
Every Sunday Tendrix analyzes your data across all four pillars and surfaces what is actually driving your results. Your bench press increased 14 percent in the six weeks since your creatine consistency hit 90 percent. That kind of insight — personalized to your history, not generic advice.
How Tendrix works
Build your stack and program
Add your supplements with doses and timing. Pick a pre-built training program or build your own. Takes five minutes. The app is ready to go.
Log your week
Check off supplements daily. Log lifting sessions and cardio in real time. Complete your Sunday check-in with body weight, recovery ratings, sleep quality, and four structured progress photos.
See what is working
Tendrix connects the dots across your stack, your training, and your physique data. The weekly insight tells you exactly which habits are moving the needle and which ones are not.
Simple, honest pricing
Free to start. Pro when you are ready. Founding members who join the waitlist lock in a rate that never changes.
Tendrix Free
No credit card required
- Up to 5 supplements
- 3 workout sessions per week
- Basic weekly check-in summary
- Progress photo sessions
- Core strength tracking
Tendrix Pro
$79.99/year — save 33%
- Unlimited supplements and workouts
- Full supplement library and conflict analyzer
- AI-powered weekly insight
- Unlimited progress photo history and comparison slider
- Advanced correlation snapshots and trend analysis
- Priority access to new features
Founding members — first 500 only — lock in $4.99/month for as long as they remain subscribed.
Built for serious lifters.
Join the waitlist. Be among the first to get access. Lock in founding member pricing before we close the offer.
No spam. Launch updates only. Unsubscribe anytime.