Alternatives to Flo: 6 Period Trackers Compared (2026)
Switching away from Flo is easy. Picking where to land depends on why you're leaving, so here is each option judged on what it does better.
Alternatives to Flo fall into five real lanes, and the right one depends on why you are switching: Clue if you want a science-forward tracker with unusually fine control over your data, Euki if you want your cycle to never leave your phone, Natural Cycles if you want the only FDA-cleared birth control app, Apple Health if you want free and built in, and a couples tracker like Otty if the reason is a partner who wants to help. Stardust is the social, astrology-flavored option with a privacy caveat worth knowing. This guide takes each one on what it does better than Flo and where it falls short, with Mozilla Foundation’s July 2026 privacy scores alongside, so you can pick a landing spot and switch in an afternoon.
What are the best alternatives to Flo?
The best alternatives to Flo are the apps that do one specific thing better than Flo does, because Flo itself is broad: Mozilla’s reviewer described it as less a calendar and more a personal health diary that starts with your cycle and keeps going, with an AI assistant on top. If breadth is what you want, you may not need to switch at all. People switch when they want something Flo is not built around: minimal data collection, clinical rigor, hormone-free contraception, zero cost, or a partner’s view. Each of those has a clear winner below.
On privacy specifically, the independent baseline is Mozilla’s July 2026 review of Flo: 7 out of 10, with the note that sharing basic app and device data with ad and analytics partners is an optional consent whose off switch actually worked in testing, and that Flo states it does not share health data. That is a fair score, not a failing one; the alternatives below are for people who want more than fair.
Apps like Flo, compared
Two things the table cannot show. First, none of these is a drop-in Flo clone; each is better at one thing and thinner at others. Second, the privacy column is Mozilla’s, not ours, and for the three apps it did not test the honest entry is “not tested,” not a guess.
Clue: the flo alternative for data control
Clue is the Berlin-built tracker that leans into science, with research partnerships and cycle data protected under German and EU privacy law. What it does better than Flo, per Mozilla’s review, is control: each data-sharing purpose is a separate choice, including a rare option to contribute to women’s health research, and those settings stay editable after signup instead of being a one-time checkbox. The catches: ad-related sharing is opt-out rather than opt-in, so visit the settings once, and the richer features live in the paid Clue Plus tier.
Euki: the flo alternative that never leaves your phone
Euki describes itself as the period tracker that doesn’t track you: private and free forever, no account, an open-source project run by an independent nonprofit, available in English and Spanish. Mozilla’s testing backed the claim: no third-party data collection around core tracking, health data staying on the device, a PIN lock, and a wipe option, for the set’s only 10/10. What you give up is deliberate: no cross-device backup and no social features, and some of its educational resources open in an in-app browser where ordinary web tracking applies.
Natural Cycles: the alternative for hormone-free birth control
Natural Cycles is a different kind of product: it describes itself as the only FDA-cleared birth control app, using temperature tracking, with wearable integrations for overnight measurement. If your reason for leaving Flo is that you want contraception you can rely on rather than a symptom diary, this is the lane. The catches: it requires a subscription and a measuring device, and it is a contraception and fertility tool first, so general cycle-wellness features are not the point. Natural Cycles was not part of Mozilla’s test.
Apple Health: the free alternative already on your iPhone
If you have an iPhone, you already own a period tracker. Per Apple’s own guide, Cycle Tracking in the Health app logs periods and symptoms, turns on period predictions and notifications, estimates your fertile window, marks retrospectively estimated ovulation days, and can flag cycle deviations. It costs nothing and adds no new company to your data picture. What it lacks is everything on top of the dates: no guidance, no community, no partner layer. It was not in Mozilla’s test.
Stardust: the social alternative, with a caveat
Stardust is the astrology-flavored tracker with cycle comparison, compatibility scores with friends, and a built-in partner mode, and it is genuinely popular with younger users. The caveat is not ours to soften: Mozilla scored it 2/10 after observing data sent to third-party tracking services from the moment the app opened, later including birthdate, birth control type, reproductive goals, and specific symptoms, and found no in-app settings to fully disable it. If the social features are what you want, weigh that finding first.
Otty: the alternative if a partner is the reason
If you are leaving Flo because a partner wants to help and Flo’s partner mode is not enough, that is the lane we built for. In Otty, you track your cycle and your partner gets their own app: the current phase in plain terms and one specific daily tip on what would help, with every shared item opt-in and revocable. Cycle data lives on your device by default and sign-in is optional; the full design is in our privacy policy. The limits: iOS only, a subscription after the free trial, and no fertility depth. For the partner-mode comparison specifically, see Flo for Partners vs Otty, and for all the partner-sharing options in one place, the best period tracker for couples.
How to switch from Flo without losing anything
Every alternative here beats Flo at exactly one thing. Pick the thing, and the app picks itself.
If you want the underlying privacy picture for the whole category, including the two apps not covered above and a five-minute check you can run on any tracker, that is in our guide to period trackers that don’t sell your data.
Alternatives to Flo FAQ
The takeaway on alternatives to Flo: name your reason, pick the lane that wins it, carry over three dates, and give the new app three cycles. The switch itself is the easy part.
