The Peptly app
Peptide Tracker: Injection Log, Today & Reminders
By Baris Bingor · Last updated
What does the Peptly peptide tracker do?
Peptly's peptide tracker is a private log for iPhone and iPad. You log each entry with the amount you type, shown exactly as you typed it, with the site and a note; Today shows what is planned, with Log and Skip; reminders follow your own schedules; and it suggests your next injection site. It never calculates or suggests an amount, and your log stays on your phone (no cloud sync, no accounts).
What each entry records
- Peptide — from the library, or one you add yourself (e.g. BPC-157).
- Amount — the amount and unit you type, shown exactly as you typed it. Nothing is converted.
- Injection site — picked as you log, with your next site suggested.
- Date and time — recorded automatically.
- Notes — optional free-text field.
Injection-site rotation
When you log an entry, pick the site; Peptly suggests the one you used longest ago, other than the last one, so rotating is easy. The suggestion is informational — never a block — and you always choose the site.
Today and reminders
Set a schedule for your peptide (e.g. "daily", "twice weekly", "weekly") with the amount from your own plan, and Peptly fires a local notification when an entry is due. Today shows what is planned; log it or skip it in one tap, so your history stays complete. Notifications respect Focus modes and Do Not Disturb. One schedule and its reminder are free; Peptly Pro adds unlimited reminders, with Log and Skip right in the notification.
Weight and estimates
Log your weight and see your 30-day trend for free; Peptly Pro adds the long-range trend and a 30-day projection from your own weight entries — an estimate if your recent trend continues, not a prediction or medical advice. For semaglutide and tirzepatide only, Peptly Pro also draws an estimated level chart from your own log and published half-lives, labelled "Estimated, not measured".
CSV export
With Peptly Pro, your full history exports to a single CSV file with one row per entry. Columns: date, peptide, the amount and unit you typed, site, notes. Useful for sharing with a clinician, archiving, or importing to a spreadsheet.
What the tracker does not do
- No calculations — Peptly never calculates, converts, suggests or recommends an amount; it logs what you typed.
- No cloud sync — the log lives on-device only.
- No social features — no friends, no leaderboards, no shared cycles.
- No AI — no chatbot and no AI-driven suggestions.
- No vendor integration — Peptly does not link to peptide suppliers.
See also
- Peptide calculator (web)
- Injection site rotation — why & how
- Peptide cycle length — on/off basics
- Reconstitution math reference
- BPC-157 reference
- Semaglutide reference
- Best peptide calculator apps compared
Frequently asked questions
What does the Peptly peptide tracker record? +
Each entry stores the peptide, the amount you typed (shown exactly as you typed it), the injection site, the date and time, and an optional note. Your history keeps every entry: the last 30 days for free, all of it with Peptly Pro.
Does Peptly remind me when my next entry is due? +
Yes. Set a schedule and Peptly sends a local notification when an entry is due, and Today shows what is planned, with Log and Skip. One schedule and its reminder are free; Peptly Pro adds unlimited reminders, with Log and Skip right in the notification.
Where is the injection log stored? +
On-device, in the standard iOS SwiftData store. The log is never synced to a server, never sent to a third party, and never used for advertising. iCloud Backup includes it because it is in app storage like any other data.
Can I export the log? +
Yes, with Peptly Pro: your full history exports to CSV from the Log, one row per entry. Compatible with Numbers, Excel, Google Sheets — and useful for sharing with a clinician.
Is the tracker free or behind a paywall? +
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 — a second peptide and more — unlimited reminders with Log and Skip in the notification, your full history with CSV export, the long-range weight trend, a 30-day weight projection, estimated levels and Vials.