The quick answer
If you’re on iPhone and want something simpler, try Plum. It has no ads, never asks to track you, gives you period, fertile window and ovulation predictions at no cost, and imports your Clue history in a few taps. If you want nothing on any server, pick Euki. If you want more features than Clue, or you’re on Android, Flo is the biggest app in the category. Apple’s Cycle Tracking is the zero-install option.
Why people look for a Clue alternative
Clue is a careful app, and plenty of people stay. Its privacy policy says all data is stored on servers in the EU and that the health data you track is never shared with or sold to advertisers. People still leave for two reasons. The first is cost. Clue’s home page puts basic cycle predictions in the free plan and keeps advanced predictions, tracking modes and Clue Connect sharing for Clue Plus. The second is tracking. Clue’s App Store label lists Identifiers under Data Used to Track You, and its privacy policy says it uses Adjust, with your advertising identifier, to measure its ads. The same policy says Adjust can’t see the health data you track.
How we chose
We make Plum, one of the apps below, and there are no affiliate links here. We read each company’s site, privacy pages and App Store listing on October 12, 2026 and link them all at the bottom. Where a source was silent, we wrote “not stated”. Each app is here because it’s the best answer to one reason for leaving Clue. We didn’t list prices, because they change by country and month.
Plum, for a simpler iPhone tracker you can bring your Clue history to
Plum is our app. Logging a day takes a tap or two. You can track 27 things in four groups, including flow, pain, mood, energy, sleep, cravings, discharge, sex, exercise, the pill and ovulation and pregnancy tests. It predicts your next period, fertile window and ovulation and adjusts as you log. When your cycles vary it shows a range, and until it has seen enough cycles it says it’s still learning. It tracks seven birth control methods and reminds you about the pill, patch, ring and shot. You can also make a private group by invite link, where friends see each other’s period days on one timeline. Symptoms and moods stay private.
Ask Clue for a copy of your data to move across. You’ll find the request in Clue’s account settings. Clue emails a link to a zip file and shows you its password. Download the zip on your iPhone and choose it in Plum. Plum opens it on the phone and shows what it found before anything is saved. Your period days, flow and symptoms come across, and entries Plum doesn’t track stay behind.
Logging, the calendar, predictions, reminders, birth control tracking and groups come with the app at no cost. Plum Premium adds insights and the full phase tips. There are no ads, Plum never sells your data, and it never uses it for advertising. The App Store label has nothing under Data Used to Track You. Be clear on the limits, though. Plum is iPhone only, with no iPad layout, Apple Watch app or widget, and no Apple Health sync. There’s no free-text notes box. Your data is stored encrypted on Plum’s servers with a copy on the phone, so it isn’t on-device only. Plum and your data lists every service that touches it.
Euki, for no account and no server
Euki is open source and run by a US nonprofit. Its privacy FAQ says everything you enter stays on your device, with no accounts and no cloud servers. It predicts your period, tracks symptoms and pregnancy, and works in English and Spanish on iPhone and Android. There’s no paywall. The catch is that there’s no backup either, so a new phone means starting again.
Flo, for even more features than Clue
Flo calls itself the world’s top women’s health app and says over 420 million people use it. It covers periods, ovulation, pregnancy and perimenopause, with a health library, a symptom checker and Flo for Partners. It’s on iPhone and Android. Its privacy policy says it will never sell your data. Its App Store label lists Purchases, Location, Identifiers and Usage Data under Data Used to Track You, which is more than Clue’s. Our Flo alternatives guide covers its 2021 FTC settlement and Anonymous Mode.
Apple Cycle Tracking, for nothing new to install
Cycle Tracking is part of the Health app. It logs periods, symptoms, spotting and basal body temperature, and predicts your next period and a six-day fertile window. Apple says Health data synced to iCloud is end-to-end encrypted when two-factor authentication is on.
drip, for open source with temperature tracking
drip is a volunteer project whose site says everything you enter stays on your device. It can track fertility by the symptothermal method. Its FAQ links a volunteer Clue-to-drip converter and says the drip team didn’t build it and doesn’t run it.
Stardust, for friends, moon phases and horoscopes
Stardust is on iPhone and Android with a free version and a subscription called Stardust Super, which adds daily horoscopes and tarot. Friend Sync lets friends share cycles by code, and it syncs with Apple Health and Oura. Its data page says it doesn’t sell data. Its App Store label lists Purchases, Identifiers and Usage Data under Data Used to Track You.
Side by side
| Platforms | Imports from Clue | Where your data lives | Data Used to Track You | |
|---|---|---|---|---|
| Clue | iPhone, Android | Not applicable | Servers in the EU | Identifiers |
| Plum | iPhone | Yes, in the app | Plum’s servers, encrypted, with a copy on the phone | Nothing |
| Euki | iPhone, Android | Not stated | On the phone only | Data Not Collected |
| Flo | iPhone, Android | Not stated | Flo’s servers | Purchases, Location, Identifiers, Usage Data |
| Apple Cycle Tracking | iPhone, Apple Watch | Not stated | On the phone, with an end-to-end encrypted iCloud backup | Built in, no listing |
| drip | iPhone, Android | Through a volunteer converter | On the phone only | Data Not Collected |
| Stardust | iPhone, Android | From screenshots of another app | Stardust’s servers, under a random account ID | Purchases, Identifiers, Usage Data |
What to look for before you switch
- Export from Clue before you delete it. Deleting the app doesn’t delete your account, and you’ll want the file either way.
- Read the Data Used to Track You section on the new app’s App Store listing. The developer fills it in, and it takes seconds to read.
- Pick backup or on-device on purpose. A synced app survives a lost phone. An on-device app has nothing on a server to leak.
- Check the features you’d miss. Apple Health sync, notes and Android are the usual ones.
Sources
- Clue home page and plans
- Clue privacy policy
- Clue on the App Store
- Euki home page
- Euki privacy FAQ
- Flo home page
- Flo privacy policy
- Flo on the App Store
- Apple, Track your period with Cycle Tracking
- drip home page
- drip FAQ
- Stardust FAQ
- Stardust, Your Data
- Stardust on the App Store
- Plum Period Tracker & Diary on the App Store