Take the guesswork out of peptides
Track, dose and research everything in one place. PepWorld is your all-in-one peptide tracker, reconstitution calculator and research assistant — so every shot is dialed in and you always know what's working.
- Dose calculator
- Cycle planner
- Dosing log
- Lab tracker
- Body comp
- 89+ research wiki
Free forever plan · Pro from $4.99/mo · cancel anytime
- Longevity · 3
- Metabolic · 2
- Growth · 1
- Retatrutide2.0 mg · abdomen50u
- BPC-157250 mcg · subQ25u
- Tesamorelin1.0 mg · abdomen40u
One app for your entire protocol
No more scattered notes, spreadsheets and guesswork. PepWorld keeps your dosing precise, your schedule on track, and your results in view.
Reconstitution calculator
Enter your vial (mg) and bac water (mL) and instantly get the exact units to draw, concentration and doses per vial — U-100 or U-40, with a live syringe preview.
Cycle planner
Build cycles with on/off patterns, week-on-week-off and titration steps. A weekly calendar shows every shot, with optional reminders at dose time.
Dosing log & calendar
Log every injection with site, dose and auto-computed units. A GitHub-style consistency calendar, streaks and weekly activity keep you honest.
Lab results tracker
Log 10 pre-built blood panels — glucose/insulin with auto HOMA-IR, IGF-1, hormones, thyroid, lipids and more. Out-of-range flags, trends and retest reminders.
Body composition
Track weight, body-fat %, skeletal muscle, visceral fat and tape measurements, with a weight chart and a progress-photo vault you can compare side by side.
Stack builder
See interaction, synergy and timing flags for your stack, estimate weekly cost, and apply community goal templates for fat loss, healing, GH, longevity and more.
89+ peptide wiki
Plain-English profiles with pathway, popularity, reported benefits, pros & cons and clinical-stage badges. Compare any two side by side, or add to your stack in a tap.
Private & synced
Your data is yours — a private account that syncs across your phone, tablet and laptop, with one-tap export anytime. Visible only to you.
Install anywhere
Add it to your phone's home screen and it runs like a native app — fast, full-screen, dark or light theme, and available even offline.
How it works
Create your account
Sign up in seconds and start your 3-day free trial. Your private space is ready instantly.
Build your stack & plan
Add peptides from the wiki — autocomplete fills the details — calculate exact doses and lay out your cycle.
Log, track & review
Record each dose, watch your streaks build, and overlay labs and body-comp to see what's actually working.
An 89-peptide wiki built in
89+ compounds across 11 categories — from GLP-1s and growth-hormone secretagogues to repair, longevity, nootropics, sexual health and a full ancillaries/vitamins shelf. Honest, plain-English summaries with a community popularity score and clinical-stage badges. Compare any two side by side, then tap “Add to stack.”
Why people stick with PepWorld
Trackers, biohackers and first-timers use PepWorld to stay precise, consistent and organized — without the spreadsheets and guesswork.
"Finally ditched my messy spreadsheet. The calculator tells me exactly how many units to draw — no more second-guessing before every shot."
"The dose-time reminders keep me honest. My streak is past 60 days and I haven't missed a single one. That alone changed everything for me."
"I was a total beginner. The plain-English wiki and the glossary meant I actually understood what I was reading instead of getting lost in forums."
"Reconstitution math used to terrify me. Now it's enter two numbers and go. Having my log, cycles and labs in one place is exactly what I wanted."
"Logging a dose takes two taps and the consistency calendar is weirdly motivating. It feels like a polished, real app — not a side project."
"Clean, fast, private, and it works offline on my phone. Being able to compare two peptides side by side before I add them is a game changer."
Start free. Upgrade when you're ready.
Use the core tools free, forever. Unlock the full tracker — and your AI research assistant — whenever you want more.
- Reconstitution calculator (U-100 & U-40)
- Browse the 89+ peptide wiki + compare
- Dosing log on this device
- Up to 2 peptides in your stack
- Cycle planner & reminders
- Lab results tracker
- Body composition & photos
- Cloud sync & backup
- AI assistant & COA analysis
- Everything in Free, unlimited
- Cycle planner + injection reminders
- Lab tracker — 10 panels, HOMA-IR, trends
- Body composition, measurements & photos
- Stack builder, interactions & templates
- Private cloud sync + data export
- AI peptide assistant (chat)
- AI COA analysis
- Everything in Pro
- AI peptide research assistant (chat)
- AI COA analysis — upload & decode
- Community feed — post, reply & upvote
- Early access + priority support
Paid plans include a 3-day free trial — card required, no charge until day 3, cancel anytime in one click. Annual billing gets you 3 months free. AI features use automated models that can be inaccurate and are not medical advice.
Frequently asked questions
I'm brand new to peptides — is this beginner-friendly?+
How does the calculator work — how much bacteriostatic water do I add?+
How is this different from a notes app or spreadsheet?+
What's free vs paid?+
Is there a free trial, and can I cancel anytime?+
What can the AI assistant and COA analysis do?+
What's a COA, and why should I care?+
Will it actually help me stay consistent?+
What can I actually track?+
Which peptides are included, and can I use it on my phone?+
Is my data private?+
Is this medical advice? Is it safe?+
Start tracking smarter today
Your calculator, dosing log, cycles, labs and an 89-peptide research wiki — all in one private app. You'll be set up in under two minutes.
Start your 3-day free trial →No commitment · cancel anytime · free-forever plan available