A private peptide and GLP-1 tracker with no account
Pepti is a peptide tracker with no account: the iPhone app needs no sign-up and no cloud sync, and your protocol, injection log, vial records and health data stay on the phone unless you turn on the AI coach or lab-report import. Both are optional and off by default: if you turn one on, your coach messages with the app context they need, or the report you import, are sent to Pepti’s server and processed by Anthropic. Separately, the app uses install attribution, which asks through Apple’s tracking permission prompt; your protocol and health logs are not used for advertising. Nothing on this page, and nothing in the app, tells you what dose to take.
By Tessaro Pty Ltd, the maker of Pepti · Last reviewed
This page answers the question people ask before they install any health app: where does my data go? It describes how Pepti is built, item by item, so you can decide whether the trade-offs suit you. It is written by the maker of Pepti, so read it as a description of our own app, not as a comparison with anyone else’s.
What lives where
| Data | Where it is kept | When it leaves the phone |
|---|---|---|
| Protocol and injection log | On the phone, in the app’s own storage | Only as part of the context sent with a coach message, and only while the AI coach is on |
| Vial records: amounts, diluent volumes, lot numbers, costs | On the phone | Same: only inside coach context, only while the coach is on |
| Weight, measurements and notes | On the phone | Same |
| Health data you connect, such as Apple Health or WHOOP | On the phone, under the permissions you grant on the device | Same |
| Bloodwork you import | On the phone | The report you import is sent to Pepti’s server and processed by Anthropic so it can be read, only if you turn lab-report import on |
| Coach conversations | On the phone | Each message, with the app context it needs, is sent to Pepti’s server and processed by Anthropic, only while the AI coach is on |
| Purchase, diagnostic and attribution signals | Not part of your record; handled by Apple’s App Store and the services named in the privacy policy | Install attribution uses Apple’s tracking permission prompt; your protocol and health logs are not used for advertising. Otherwise as the privacy policy describes, independently of the consent switch |
| Account, password, email address | None exist | Nothing to send |
What “no account” changes
There is no sign-up screen. You install the app and start logging. There is no Pepti account to create, no email address to verify, no password to choose and none to reset later. The subscription is handled by Apple through your Apple ID, in the same way as any other App Store purchase, so paying for the app does not create a Pepti account either. Pepti is $12.99 per month or $49.99 per year in USD, with no free trial; you can cancel anytime.
The trade-off is worth stating plainly, because it is the other half of the same design. With no account there is no server copy of your log, so there is nothing we can restore for you if a phone is lost. Recovery depends on your own iPhone backup, not on us. If you would rather have a provider hold a copy of your history, that is a legitimate preference, and it is not how this app works.
What “no cloud sync” means in practice
A log lives on the device it was made on. A second iPhone or an iPad does not see it, because there is no server in between for the two to meet on. When you move to a new iPhone, the app’s data travels the same way as every other app’s: through Apple’s device-to-device transfer or a restore from your own backup. Pepti holds no copy to restore from, which is the point.
The absence of sync is also why the app works without a connection. Logging an injection, checking a vial’s dates or reading back last month’s entries needs nothing from the network. The travel guide covers what that means on the road.
The one exception for your record: the AI coach and lab-report import
Two optional features need a server, and both sit behind a single consent switch that is off until you turn it on. Your protocol and health data stay on the device. There is no cloud sync. That data leaves your phone only if you turn on the AI coach or lab-report import, both behind one consent switch, and then only your coach messages with the app context they need, or the report you import, are sent to Pepti’s server and processed by Anthropic. With both off, none of it is held on a server for anyone to lose, sell or hand over.
“The app context they need” is specific. A coach message is sent together with the parts of your record the answer depends on: the profile you entered at set-up (such as age, sex, weight, experience, activity and diet), your current protocol, recent log entries, your vial inventory, any health metrics you have connected, including WHOOP metrics if you linked that account, recent bloodwork you have imported, your stated goals and the current time. That context is what lets the coach answer about your own record rather than in general; it is also exactly the data you are choosing to send when you turn the switch on. Turn it off again in Settings and no further coach data is sent. The coach explains published pharmacology with citations and does not recommend a dose.
Lab-report import works the same way. The report you choose is sent to Pepti’s server and processed by Anthropic so that the values in it can be read into your record. Import nothing and no report is sent. The app’s full privacy policy, which also covers purchase, diagnostic and attribution data that are not part of your record, is at tessaro.com.au/privacy.html.
Why a tracker should be built this way
An injection log is one of the more sensitive records a person keeps. It names compounds, amounts and dates, and over time it describes a routine. Keeping it on the phone means it is protected by the same passcode or Face ID that protects the rest of your phone. With the AI coach and lab-report import off, none of your record is held on our side, so there is nothing of it for us to lose in a breach, to sell, to share or to be made to hand over. While either feature is on, what leaves the phone is the context described above, processed as the privacy policy describes.
None of that makes the phone itself a perfect vault. It makes the design honest: your record is where you can see it, under controls you already understand, and the only time any of it goes anywhere is when you switch on a feature that cannot work otherwise.
Tracking GLP-1 injections privately with Pepti
For a weekly GLP-1 routine the record is short and the value is in its consistency: the date and time of each injection, the site it went into, which pen or vial it came from and anything you noticed afterwards. Pepti keeps that log with a 12-site rotation sequence, so each injection is recorded somewhere other than the last, and it keeps the lot and expiry dates for each pen or vial alongside the log. The GLP-1 tracker guide walks through the weekly log in detail, and the rotation guide covers the site sequence.
If you draw from a vial you reconstituted yourself, the free reconstitution calculator on this site (not the app) converts the amount in the vial, the water you added and the figure you already have into a draw volume and syringe units. Every input is yours. Weight and any bloodwork you import sit alongside the log on the same timeline, on the same phone.
Why this page has no dosing section
Pepti is a record-keeping tool. It logs the figure you already have with the date, time, site and vial, and remembers where the last injection went. It does not supply the figure, for GLP-1 medicines or for anything else. That is a decision for you and whoever directs your use, and keeping the app on the record-keeping side of that line is as deliberate as keeping your data on the phone.
What a private record still needs from you
Keeping the data on the phone moves the responsibility for it onto the phone’s owner. Four habits cover most of it.
- A passcode or Face ID on the phone — the app’s data is protected by whatever protects the phone.
- Your own backup — there is no server copy, so a lost phone without a backup is a lost log.
- A deliberate decision on the consent switch — leave the AI coach and lab-report import off if you would rather nothing was ever sent; turn them on knowing what goes.
- Logging at the time — a private record is only as good as its entries. The clock time, the site and the vial, written down when it happens.
The guide to choosing a peptide tracking app sets out what any good record holds, whichever app keeps it, and the free spreadsheet template is there if you would rather keep a file of your own.
Common questions
Is there a peptide tracker with no account?
Yes. Pepti – Peptide Tracker for iPhone works with no account, no sign-up and no cloud sync; your protocol and health data stays on the phone unless you turn on the AI coach or lab-report import, both off by default. Some other trackers, such as PeptIQ, allow basic use without an account and offer optional cloud sync (its own site, Oct 2026); Pepti has no cloud sync at all. Pepti costs US$12.99 a month or US$49.99 a year.
Does Pepti need an account?
No. There is no account and no sign-up. You install the app and start logging; there is no Pepti account to create, no password, and the subscription is handled through your Apple ID like any other App Store purchase.
Is my data private?
Pepti has no account and no sign-up, and your protocol and health data stay on the device. There is no cloud sync. That data leaves your phone only if you turn on the AI coach or lab-report import, both behind one consent switch, and then only your coach messages with the app context they need, or the report you import, are sent to Pepti's server and processed by Anthropic. With both off, none of it is held on a server for anyone to lose, sell, or hand over.
Does Pepti sync between my iPhone and iPad?
No. There is no cloud sync, so a log lives on the device it was made on. If you move to a new iPhone, the app's data moves the same way as any other app's: through Apple's device transfer or a restore from your own backup. Pepti holds no copy to restore from.
What does the AI coach send, and can I turn it off?
The coach is off until you turn it on. While it is on, each message you send goes to Pepti's server with the app context it needs, such as the profile you entered at set-up, your current protocol, recent log entries, vial inventory, any health metrics you have connected (including WHOOP, if linked) and your goals, and is processed by Anthropic to produce the answer. Turn the consent switch off in Settings and no further coach data is sent.
Does Pepti tell me what dose to take?
No, nowhere, by design. You enter a figure you already have and Pepti records it with the date, time, injection site and vial. It never suggests, recommends, or calculates what that figure should be. That is a decision for you and whoever directs your care, and Pepti stays on the record-keeping side of that line.
How much does Pepti cost?
Pepti is $12.99 per month or $49.99 per year in USD, with no free trial; you can cancel anytime. There is one tier and no free version: every feature is included, with nothing gated behind an upgrade, and there are no ads in the app. Your protocol and health logs are not used for advertising; install attribution uses Apple's tracking permission prompt.
Is there a free app for tracking peptides?
Pepti is not free: it is $12.99 per month or $49.99 per year in USD, with no free trial. Two things on this site are free: the browser reconstitution calculator and a CSV spreadsheet template with the columns a private record needs. Other apps offer free tiers; this page is about Pepti only, and the comparison hub covers the others from their own pages.
How do you track peptides?
Keep one dated record. For each injection: the compound as labelled, the clock time, the figure you were working to in your own unit, the site, and the vial it came from. For each vial: the amount printed, the lot, the diluent volume you added, the date you mixed it and the discard-by date. And the date anything changed. Pepti keeps that record on the phone; a spreadsheet can hold the same columns.
This page describes how Pepti stores and handles data. It is not a security certification, and it provides no dose figure and no schedule.
The Pepti peptide tracker for iPhone keeps the log, the site sequence, the vial records and your notes on the phone.
Not medical advice. Pepti is a record-keeping tool, not a medical device.
Get Pepti on the App StorePepti – Peptide Tracker · Guides · Reviewed October 2026 · Editorial policy · About