🧬 Built for peptide enthusiasts

Your peptide protocol,
simplified.

Smart scheduling, reconstitution math, conflict detection, and vial tracking — all in one beautiful app. Finally, a peptide tracker that gets it.

50+
Peptides in database
18
Supplement pairings
100%
Free forever
Good morning 👋
Sunday, April 12
12
Day Streak 🔥
M
T
W
T
F
S
S
Today's Protocol
BPC-157
250mcg — AM fasted
✓ Done
TB-500
2.5mg — AM fasted
Pending
Ipamorelin
200mcg — PM
Tonight
🏠
Home
💊
Peptides
Stack
📅
Calendar

Everything you need to run a smart protocol

From reconstitution math to conflict detection, PepDiary handles the complexity so you can focus on results.

📅
Smart Scheduling

Automatically generates your injection schedule based on peptide half-lives, your goals, and preferred timing. AM/PM/fasted grouping built in.

🧮
Reconstitution Calculator

Input your vial size, BAC water amount, and desired dose — get exact draw volumes instantly. No more guesswork with the syringe.

⚠️
Conflict Detection

Automatically flags dangerous interactions and timing conflicts in your stack. Color-coded alerts so you never miss a warning.

🧪
Vial Tracker

Track exactly how many doses remain in each vial. Get notified when you're running low. Know your cost per dose at a glance.

🧬
Discovery Survey

Answer a few questions about your goals and get personalized peptide recommendations with research-backed protocols.

🏆
Streaks & Levels

Stay consistent with streaks, XP points, levels, and achievement badges. Protocol adherence has never been this motivating.

💊
Supplement Pairings

18 science-backed supplement recommendations grouped by timing. Know exactly what to stack with your peptides for maximum effect.

📸
Label Scanner

Scan your peptide vial label with your phone camera to auto-fill product details. Powered by OCR — no typing required.

📊
Progress Tracking

Log weight, mood, and notes alongside each dose. See your protocol's impact over time with a beautiful visual calendar.

Up and running in minutes

No complex setup. No spreadsheets. Just your protocol, organized.

1
🔐

Sign Up Free

Create your account in seconds. No credit card, no commitments. Your data syncs across all your devices automatically.

2

Build Your Stack

Browse 50+ peptides, use the Discovery Survey to find your fit, or manually add your own. Customize doses, timing, and days.

3
📈

Track & Optimize

Log each dose with a tap. Watch your streak grow. Review your calendar, monitor vials, and adjust your protocol as you learn what works.

Built by users, for users

PepDiary is built by peptide enthusiasts who got tired of spreadsheets and sticky notes.

★★★★★

"Finally an app that handles reconstitution math. I used to mess this up constantly. The syringe calculator alone is worth it."

💪
Alex R.
BPC-157 + TB-500 stack
★★★★★

"The conflict detection caught something I would have completely missed. This app might have saved me from a bad experience."

🌸
Jordan M.
Anti-aging protocol
★★★★★

"Love the streaks feature. Never thought gamification would work on me but my adherence went from 60% to nearly 100%."

🏃
Sam K.
Performance protocol

Start tracking your protocol today.

Free, private, and built for people who take their peptide game seriously.

No credit card required  ·  Works on all devices  ·  Your data stays yours