Apple puts a privacy label on every App Store listing, and Plum’s is longer than some. It names seven kinds of data under Data Linked to You. The section above it, Data Used to Track You, is empty. Plum has never asked for permission to track you, so it has no advertising ID to track you with, and nothing you log follows you anywhere else.
Read the two sections in that order and the label stops being frightening. Below is every line of it, and the part of the app that puts it there.
Line by line
| Health & Fitness | What you log. Period days and flow, spotting, symptoms, moods, energy, sleep, and any other category you switch on, plus workouts if you track exercise. |
|---|---|
| Sensitive Info | Sex Life is one of the categories you can log, and so is a pregnancy test result. Apple counts both as sensitive, so the label has to say so even though the entries are optional and stay with you. |
| Contact Info | The name and email address that come back from your Google or Apple sign-in. Plum uses them to sign you in and to find your history on a new phone. |
| Identifiers | Your Plum account ID, the token Apple issues so reminders can reach your phone, and the install ID that measures which ad brought you. None of these is your advertising ID. |
| Purchases | Whether Plum Premium is active and when it renews. Apple handles the card, so Plum never sees it. |
| Usage Data | Which screens and buttons get used, and the app version. What you log is left out of this unless you turn the optional analytics box on yourself. |
| Diagnostics | Crash reports with the health fields stripped out before they leave the phone, and how long each screen took to load. |
Nothing else is on it. Plum never asks for your contacts, your location or your photos. You can read the label yourself on the App Store listing, under App Privacy.
Why the list is this long
Because Plum keeps your cycle under an account on a server, encrypted in transit and at rest. That is the whole reason your history survives a new phone and a group of friends can see each other’s period days. A tracker that stores everything on the phone alone has a shorter label and cannot do either of those things.
So pick on the trade, not the length. If you want a group, pick Plum. If you want nothing to leave the phone at all and you can live without sharing or a backup, Euki is the honest answer, and our comparison of five trackers says the same thing.
The longer version of what Plum stores, and which companies see any of it, is on how Plum handles your data.
