Tracker reference
Peptide Injection Tracker: Log Every Entry, Site, and Schedule
By Baris Bingor · Last updated
What does a peptide injection tracker log?
A peptide injection tracker records each entry's details: the peptide, the amount and its unit, the injection site, the time, and notes. Good trackers also suggest your next site, remind you on your own schedule (once weekly, daily, etc.), and export to CSV for sharing. Peptly does all of this — CSV export with Peptly Pro — and keeps the log on your device, with no accounts and no cloud sync; it never calculates or suggests an amount.
Why a dedicated tracker beats a spreadsheet
A peptide protocol has more moving parts than most apps assume. You're juggling: which vial you reconstituted with how much bacteriostatic water, what concentration that gives you, what dose your protocol calls for today, which titration step you're on, where you injected last week, and when the next shot is due. A spreadsheet captures the data but doesn't show you what's due today, suggest your next site, or fire a notification on schedule.
Peptly's tracker is designed for the routine — see what's planned today, log or skip each entry in one tap, rotate your sites and get reminded next time. It never calculates or suggests an amount: every amount in your log is one you typed. The log is yours alone (on-device only) and, with Peptly Pro, exports as CSV when you need a copy.
What the tracker does
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Per-entry log. Every entry — the peptide, the amount and unit you typed (shown exactly as typed, never converted), the time, the site, and your notes. Stored on-device; the log is never uploaded.
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Next-site suggestion. Pick a site as you log, and Peptly suggests the one you used longest ago, other than the last one, so rotating is easy.
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Today, with Log and Skip. See what is planned today and log or skip each entry in one tap, so your history stays complete.
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Schedule reminders. Daily, twice-daily, every-other-day, twice-weekly and weekly schedules fire a notification at the time you set. One schedule and its reminder are free; Peptly Pro adds unlimited reminders, with Log and Skip right in the notification.
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CSV export (Pro). Export your full history as a CSV to email, AirDrop or save to Files. Useful for sharing a research period with a clinician or another researcher.
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On-device log. No accounts and no cloud sync. Your injection log never leaves the device unless you export it.
Schedules it can follow
- Your own schedule, for any peptide. Daily, twice daily, every other day, twice weekly or weekly, at the time you set. Peptly does not know or suggest a protocol for any peptide; the schedule and the amount come from your own plan.
- Any peptide in the library, or your own. The library has plain-language profiles of 23 peptides — including semaglutide, tirzepatide, retatrutide, BPC-157, TB-500, ipamorelin, CJC-1295, tesamorelin, GHK-Cu, AOD-9604, MOTS-c, NAD+, GHRP-2 and GHRP-6 — with no amounts, frequencies or regimens, and you can add your own.
- Amounts that change. When your amount changes, you type the new one; each entry keeps the amount exactly as you typed it. See the GLP-1 dose calculator for the label schedules and the math.
Site rotation, briefly
Common research injection sites for subcutaneous peptides: four abdomen quadrants (avoid 2 inches around the navel), upper thigh outer, deltoid posterior, and gluteal upper outer. Rotating week to week reduces local tissue stress. Peptly suggests your next site: the one you used longest ago, other than the last one. It's only a suggestion; you pick the site.
How a log helps next time
The most under-appreciated benefit of a log is the record itself. Each entry keeps the amount exactly as you typed it, with its site and time, so next time you can see what you logged last and where, without guessing. With Peptly Pro, Vials keep what each label says, the water you added, the date and your notes, exactly as you wrote them; the app never works anything out from them. For the reconstitution arithmetic, use the free calculator on this site.
Over a multi-week protocol, that record helps you avoid a whole category of mistakes: a missed entry, a doubled one, or the same site twice in a row.
Privacy in practice
- No accounts. No login. No sign-up.
- No analytics on what you write. Peptly's analytics (Firebase + AppsFlyer) record app events, such as an entry being logged — never the amount, the site, or your notes.
- No third-party syncing. The log lives in Peptly's SwiftData store on your iPhone. If you delete the app, the log is gone.
- You control export. CSV export (Peptly Pro) is a deliberate action — tap, choose a destination, send.
See also
- Peptide calculator — the reconstitution math, on this website
- GLP-1 dose calculator — Semaglutide, Tirzepatide, Retatrutide schedules
- Peptide dosage reference
- How to reconstitute peptides — step-by-step
- BAC water calculator
- Peptide reconstitution math reference
Frequently asked questions
Why do I need to rotate injection sites? +
Repeated injections in the same site can cause local tissue stress — lipohypertrophy (fat tissue thickening), scar tissue, and altered absorption. Rotating sites week to week is a standard injection-hygiene practice. Peptly's log suggests your next site: the one you used longest ago, other than the last one.
What information should I log for each peptide injection? +
A useful log entry has: the peptide, the amount and its unit, the injection site, the time, and any notes (timing, anything you noticed). Peptly keeps each of these exactly as you type them; it never works out an amount for you.
Can I track multiple peptides at once? +
Yes, with Peptly Pro: stacks let you log a second peptide and more, each on its own schedule with its own reminders, all in the same log. The free version covers one peptide.
Where is my injection log stored? +
On your device. Peptly uses SwiftData (Apple's on-device persistence) and never uploads your log. There are no accounts and no cloud sync. If you uninstall the app, the log is deleted; with Peptly Pro you can export it to CSV first if you want a backup.
Can I export my log to share with a clinician or research collaborator? +
Yes, with Peptly Pro. Export your full history as a CSV, then email it, AirDrop it, or save it to Files. Each row has the date, the peptide, the amount and unit you typed, the site, and your notes.
How are reminders scheduled? +
You set a schedule — daily, twice daily, every other day, twice weekly or weekly — and the time of day, and Peptly schedules a local notification for each entry. Notifications are local, so they work offline and don't require an account. One schedule and its reminder are free; Peptly Pro adds unlimited reminders.
Does Peptly know GLP-1 titration schedules like Wegovy's? +
No. Peptly never suggests an amount or a titration step. When your amount changes, you type the new one, and each entry keeps the amount exactly as you typed it, so your history shows every step. See the GLP-1 dose calculator for the label schedules and the math.
Is the tracker free, or part of Peptly Pro? +
Both. Free, with no time limit: logging one peptide, Today with one reminder, injection sites with the next-site suggestion, your weight with a 30-day trend, the last 30 days of history and the library. Peptly Pro — a weekly, monthly or yearly subscription, or a one-time lifetime purchase; prices show in the app — adds stacks, unlimited reminders, your full history with CSV export, the long-range weight trend, a 30-day weight projection, estimated levels and Vials.