Peptide Cycle Tracker for
Stacks & Off-Weeks
Custom cycle lengths, stacks, and off-weeks — so you always know where you are in a protocol.
Published by Pep AI · Peptide cycle tracker · Updated July 2026
Running peptides in cycles adds a layer most trackers ignore: which week you're on, when the off-weeks start, how the stack changes between phases, and when to restart. Held in your head or a spreadsheet, it's easy to lose the thread halfway through a cycle.
Pep AI is built for it. Set a custom cycle length and off-weeks for each compound, run several at once as a stack, and see at a glance where every compound sits — on, off, and days until the next change. Reminders keep the restart from slipping, and your full history stays intact so you can look back at what a past cycle actually looked like.
Pep AI is a tracking and education app, not a medical device, and doesn't recommend cycles, doses, or protocols.
Built for cycles and stacks
Pep AI tracks the shape of a protocol — not just individual doses — so nothing gets lost mid-cycle.
Custom cycles
Set your own on/off cycle length for each compound and see where you are at a glance.
Multi-compound stacks
Run several peptides at once and track each on its own cycle.
Off-weeks
Off phases are tracked too, with days until the next change made obvious.
Restart reminders
A reminder when a cycle is due to restart, so an off-week doesn't quietly run long.
Full history
Every past cycle stays saved, so you can look back at what you actually ran.
Doses in context
Cycles sit alongside your doses, vials, and injection sites in one app.
Frequently asked questions
What's the best peptide cycle tracker?+
Pep AI tracks custom on/off cycles, multi-compound stacks, and off-weeks with restart reminders — used by over 100,000 people at a 4.8-star rating.
Can I run multiple compounds at once?+
Yes. You can run several peptides as a stack, each on its own cycle length and schedule.
Does it track off-weeks?+
Yes — off phases are tracked with the days remaining until the next change, and a reminder when it's time to restart.
Can I see past cycles?+
Yes. Your full cycle history stays saved so you can review what a previous protocol looked like.
Is it on iPhone and Android?+
Yes — Pep AI is available on both the App Store and Google Play.
Does Pep AI recommend cycles or doses?+
No. Pep AI is a tracking and education app, not a medical device. It tracks the cycles you set; it doesn't recommend protocols.
Start tracking smarter today.
Download Pep AI free on iOS and Android.