Plum, Euki, drip. and Apple’s Cycle Tracking are period trackers for iPhone with no ads at all. We’d pick Plum, which we make, if you want a full tracker with a backup and free predictions. Euki and drip. are the picks if you also want nothing to pay for and are happy with your data living only on your phone. Apple’s is the one you already have.
How we chose
We make Plum, and it’s on this list. There are no affiliate links. We read Euki’s and drip.’s own sites on October 21, 2026, and the App Store tracking labels in the table below. We only list an app here if it shows no ads anywhere, free version included. Then we looked at what else comes with it, such as a paid tier or a backup.
Plum, for a full tracker with no ads and a backup
Plum is an iPhone app. You log in a tap or two, with 27 things to track, from flow and cramps to mood, sleep and discharge. It predicts your next period, fertile window and ovulation, and the predictions adjust as you log. It reminds you before your period, and it tracks birth control with pill, patch, ring and shot reminders. All of that is free.
There are no ads, and the app doesn’t carry the code that shows them. It never asks to track you, and the Data Used to Track You section of its listing is empty. Your history is saved to your account, so a new iPhone picks up where you left off.
Plum is paid for by Premium, which adds insights and the full set of phase tips. A free user sees that offer at the end of setup, once a period after logging its first day, and when opening something Premium covers. You can close it every time. Friends can also join you in a group for free and see each other’s period days. Plum isn’t on Android and doesn’t sync with Apple Health.
Euki, for no ads, no cost and no account
Euki says it’s 100% free with no paywalls and doesn’t use your data to target you with ads. It never collects your data in the first place, so there’s no account. It tracks your period and symptoms and predicts your next period once you’ve tracked for two months. Its FAQ says there’s no cloud backup. It’s on iPhone and Android, in English and Spanish.
drip., for no ads, open source and fertility charts
drip. is open source, and its site says everything you enter stays on your device. Its App Store listing is free with no in-app purchases. It predicts your next periods after three cycles, and if you chart temperature and cervical mucus it shows fertile days. It’s on iPhone and Android, including F-Droid.
Apple Cycle Tracking, for nothing to install
Cycle Tracking is part of the Health app on every iPhone. It logs your period, flow and symptoms, predicts your period and fertile window, and works from an Apple Watch. There’s no ad and nothing to buy. It’s the simplest pick if you only need the basics.
No ads isn’t the same as not tracked
An app can show no ads and still send data to other companies. Apple makes every developer say so under Data Used to Track You, so that’s the line to check next to the ad count. Here’s what it says for the trackers people ask about most.
| App | Data Used to Track You | Can share your cycle |
|---|---|---|
| Plum Period Tracker & Diary | Nothing. The section is empty | Groups of friends, several people at once |
| Euki | Nothing. The label is Data Not Collected | None |
| drip. | Nothing. The label is Data Not Collected | None |
| PrivateCycle | Nothing. The label is Data Not Collected | None |
| Clue | Identifiers | Clue Connect, one way |
| Stardust | Purchases, Identifiers, Usage Data | Friend Sync, several people at once |
| Flo | Purchases, Location, Identifiers, Usage Data | Flo for Partners, one partner |
Which one to pick
Pick Plum if you want predictions, reminders and a backup with no ads, and you don’t mind closing a Premium offer now and then. Pick Euki or drip. if you never want to see an offer and can live without a backup. Use Apple’s Cycle Tracking if you only want the basics. Our comparison of five trackers goes further on privacy and features, and Does Plum have ads? answers that question on its own.
