Privacy policy
Peptrend has no account system and no servers of its own. Everything you log is stored on your device, and — if you leave iCloud on — in your own private iCloud database, which we cannot read. Starting with version 1.5.2, the app includes one piece of third-party code, Meta's SDK, so that we can tell whether our ads on Facebook and Instagram lead to installs and purchases. It reports that the app was opened and when a Pro trial or purchase happens. It runs only for people using the United States App Store, and it never receives anything you log.
What is collected
Your health data is not collected. Weigh-ins, doses, medications, vials, schedules, goals, injection sites, Apple Health readings and Athlete Mode metrics never leave your device except through your own iCloud and the Apple Health and file routes described below. There is no sign-up, no login and no email address, and we cannot see a single one of your weigh-ins.
Versions 1.5.2 and later send a small set of advertising-measurement events to Meta Platforms through Meta's SDK (the FacebookCore component, and nothing else from it). The app sends exactly three kinds of event, plus the SDK's launch event:
- App opened. At launch, the SDK reports that the app was installed or opened. This is what lets Meta count an install that followed one of our ads.
- Free trial started, with the product identifier of the plan.
- Subscribed or purchased (the lifetime unlock), with the product identifier, its price and its currency.
These events are sent only if your iPhone or iPad uses the United States App Store. The app checks the App Store country when it starts; with any other country, or if the country cannot be read, the SDK is never started and nothing is sent to Meta.
With each event the SDK includes technical details it adds itself: an anonymous identifier it generates for this app on this device, the device model, iOS version, language, time zone and app version. Meta's servers also see the IP address of the connection, as any server does.
The app never asks for permission to track you (Apple's App Tracking Transparency prompt), so it never reads your device's advertising identifier, and iOS blocks the tracking domain Meta's SDK declares. The SDK's automatic event logging, its collection of screen titles and its diagnostic reports are switched off. Nothing about what you log, which screens you view or what you type is passed to it.
We do not receive these events individually. Meta reports them back to us as totals, such as how many installs or trials followed an ad. The app switches on Meta's Limited Data Use option before the SDK sends anything, and leaves Meta to work out which state you are in. In the US states where Meta applies Limited Data Use, which include California, Meta processes the events as our service provider and restricts its own use of them. In other states Meta processes them under its ownprivacy policy and business terms, which allow it to use event data to measure and improve the delivery of ads.
Apple's privacy label for Peptrend lists this as Identifiers, Purchases, Usage Data and Other Data, none of it used to track you. Versions before 1.5.2 do not include the SDK and send nothing.
Where your data lives
On your device
Weigh-ins, doses, vials, goals, schedules and settings are stored in a local database on your iPhone or iPad. Deleting the app deletes that database.
In your iCloud
If iCloud is enabled on your device, that database is mirrored into the privatedatabase of an iCloud container tied to your Apple Account. This lets your own devices stay in sync. Apple operates this storage under Apple's privacy policy; the developers of Peptrend have no access to it, no console view of it, and no ability to read, export or recover it. Turning off iCloud for Peptrend in iOS Settings stops the mirroring.
Apple Health
Peptrend reads from Apple Health, and writes body mass back to it. Which types it reads depends on what you have switched on, and nothing is read until you grant permission. Your doses, vials, goals and schedules are never sent to Apple Health at all.
Reading your weight. Peptrend imports body-mass samples so weigh-ins already on your device appear in the app. Samples read this way are copied into the same local database described above.
Reading fitness metrics. Athlete Mode is off until you switch it on. When you do, Peptrend asks Apple Health for ten more types and charts them beside your dose history: VO₂ max, heart rate variability, resting heart rate, cardio recovery, walking heart rate average, respiratory rate, blood oxygen, sleeping wrist temperature, exercise minutes and active energy. They are requested at the moment you turn the mode on and not before — leave it off and the permission sheet lists body mass alone, and the app reads none of the ten. Peptrend only reads those ten; body mass stays the single type it ever writes. Nothing else is asked for at all: no body fat, no lean mass, no waist, no nutrition, no steps, no sleep stages, no menstrual or reproductive data, no clinical records and no individual workout records. What comes back is charted on your device and goes no further; we have no server for it to reach.
Writing. If you also grant write permission, a weigh-in you type into Peptrend is saved back to Apple Health as a body-mass sample, so your other apps show the same number. Only entries you type here are written back: a weigh-in that came from Apple Health is already there, and one that arrived in a JSON import belongs to whichever app exported it. Editing a weigh-in replaces the sample Peptrend wrote, because Health samples cannot be changed in place. Deleting a weigh-in inside Peptrend does notremove the sample from Apple Health — delete it in the Health app if you want it gone from there too.
Read permission and write permission are separate. Either can be refused, and either can be revoked at any time in the Health app under Sharing → Apps, which lists every type Peptrend has asked for. Refusing write permission stops the write-back and changes nothing else about the app. Turning Athlete Mode off stops the fitness reads on its own.
Purchases
Subscriptions and the lifetime purchase are handled entirely by Apple's App Store. Peptrend asks Apple whether a purchase is active; it never sees your payment details, billing address or Apple Account. Apple's own privacy policy governs the transaction. When a trial or purchase starts from the paywall on the US App Store, the product, price and currency are also reported to Meta, as described above. Renewals and restored purchases are not.
Notifications
The optional dose reminder is a local notification scheduled on your device. There is no push server and nothing about your schedule leaves the phone.
Files you import or export
Import and export happen through the iOS document picker and share sheet. The file is read or written directly on your device or in whatever location you choose. Nothing passes through us.
Children
Peptrend is not directed at children and is not intended for anyone under 18.
Your rights
We hold no data about you, so there is nothing for us to disclose, correct, export or delete on request. You already hold every copy of your log. To erase it, delete the app and, if you used iCloud sync, remove Peptrend's data from iCloud in iOS Settings. The app also has a "Reset all data" control in Settings.
The measurement events described above are held by Meta, keyed to the SDK's anonymous identifier rather than to your name or account. Deleting the app deletes that identifier from your device. Requests about the events Meta holds go to Meta through itsprivacy policy; we can also ask Meta on your behalf if you write to us.
Questions about this policy go to support@fluctusltd.info. Please do not attach your log; we have no copy of it and no use for one.
Changes to this policy
If the app ever collects anything beyond what is listed here, this page will say so before that version ships, and the effective date above will change.