Best Free Period Tracker Apps in 2026: A Complete Comparison
“Free” is doing a lot of work in that phrase. Every period tracker on the app store technically has a free download button, but what happens after that varies enormously — some apps genuinely give you full tracking at no cost forever, some gate the useful features behind a paywall after a week, and some are free because your data is the product being sold to advertisers instead of you paying with money.
This guide compares six apps that are actually free to use in a meaningful way in 2026 — Clue, Cora, Drip, Euki, Flo, and Spot On — looking at what’s genuinely included at no cost, what’s locked behind a subscription, how each one funds itself, and how that funding model affects your privacy.
What “Free” Actually Means for a Period Tracker
Before comparing apps, it helps to know what questions actually separate a genuinely free tracker from one that just uses “free” as a download hook:
- Does core tracking require payment eventually? Some apps give you a few free months of full features, then quietly downgrade you once your trial ends.
- Is there a subscription at all, or is it a one-time purchase, ad-supported, or fully free forever? These are very different business models with different long-term costs.
- How does the app make money if it’s free? A free app funded by a nonprofit, a one-time purchase, or a paid upgrade tier behaves very differently from one funded by advertising or data partnerships.
- Does the free tier require an account? Account-based apps typically store your data on a company server; account-free apps often store it only on your device.
- What happens to your data specifically? Free doesn’t automatically mean unsafe, but it’s worth knowing whether “free” comes with data sharing attached.
With that framework, here’s how six of the most-searched free period trackers actually compare.
Why “Free” Looks Different Than It Did a Few Years Ago
The free-tier landscape for period trackers has shifted noticeably since Flo’s 2021 FTC settlement put data-sharing practices under a spotlight. Several commercial apps introduced opt-in anonymous or private modes afterward, EU-based apps leaned harder into privacy as a selling point, and a handful of nonprofit and open-source alternatives gained real traction as people started asking what funds a “free” app in the first place. That’s part of why this list includes options with very different business models side by side — a subscription-funded freemium app, an open-source project, and a nonprofit-backed tool aren’t interchangeable, even when all three cost nothing to download.
Quick Comparison
| App | Free Tier | Account Required | Funded By |
|---|---|---|---|
| Clue | Core cycle tracking, symptoms, education | Optional for basic use | Freemium subscription (Clue Plus) |
| Cora | Cycle tracking, symptom logging, basic insights | Yes | Freemium subscription (Cora Plus) |
| Drip | Full app, open source | No | Community-maintained, no revenue model |
| Euki | Full app, including reproductive health resources | No | Nonprofit-funded |
| Flo | Cycle tracking, large content library | Yes | Freemium subscription; prior data-sharing scrutiny |
| Spot On | Full app, including symptom and method tracking | No | Funded by Planned Parenthood |
Clue
Clue’s free tier covers the essentials well: cycle and symptom logging, mood and exercise tracking, and access to Clue’s research-backed educational content, which has been recognized by reproductive health organizations as some of the more scientifically grounded content in the category. You don’t need an account for the most basic logging, though syncing across devices requires one.
What’s gated behind Clue Plus is the deeper analysis: advanced cycle predictions that adapt more precisely to your data, detailed pattern views, unlimited custom symptom tags, and cycle-sharing with a partner or clinician. For someone who just wants to log a period and see a reasonable prediction, the free tier is genuinely usable long-term rather than a bait-and-switch trial. For anyone who wants deeper insight into their own patterns, the free version will eventually feel limited.
On the funding side, Clue is a subscription business — Clue Plus is what pays the bills, not advertising or data sales, and the company is based in Berlin under EU privacy law, which tends to produce stricter default data handling than apps built primarily for the US ad market.
Good for: People who want solid basic tracking for free indefinitely, with an optional upgrade for deeper analysis. Not ideal for: Anyone who wants advanced predictions or pattern insights without ever paying.
Cora
Cora’s free tier includes cycle tracking, daily symptom check-ins, and basic pattern insights, which is enough to get a real sense of whether the app fits your needs before deciding whether to upgrade. Because Cora is built specifically around PCOS and irregular cycles, even the free tier learns your actual cycle range rather than assuming a 28-day average — a meaningful difference from trackers that only unlock accurate irregular-cycle handling at the paid tier.
The full toolkit — cycle-phase movement plans, the AI meal scanner with a PCOS-specific score, medication and supplement tracking, and the doctor-ready summary export — sits behind Cora Plus, priced at $49/year (about $4.08/month) or $19.99/month. That’s a single plan with everything included once you’re on it, rather than multiple paid tiers to navigate.
On privacy, Cora’s revenue comes entirely from that subscription, not advertising or data sales — the company states data is encrypted end to end and never sold, with no ad network behind the app at all, free tier included.
Good for: Getting real cycle and symptom tracking at no cost, especially for irregular or PCOS-related cycles, with a clear upgrade path if you want the full toolkit. Not ideal for: Anyone who wants the complete feature set (movement plans, food scanning, doctor summaries) without ever subscribing.
Drip
Drip is open source and community-maintained, which means there’s no company behind it monetizing your data because there’s no company at all in the traditional sense — it’s built and maintained by volunteer developers. The full app is free, with no subscription tier, no ads, and no account requirement. Because it’s open source, its code is publicly viewable, which is about as transparent as a privacy claim can get: you’re not asked to trust a policy, you can see what the software actually does.
The trade-off is support and polish. Community-maintained software doesn’t have a dedicated support team, feature updates depend on volunteer time rather than a product roadmap, and the interface and feature set are generally more basic than a funded commercial app.
Good for: Privacy-maximalists who want free, transparent, open-source software with no account or company involved. Not ideal for: Anyone who wants polished design, customer support, or frequent feature updates.
Euki
Euki is a nonprofit-funded app, which changes its incentives from the ground up — there’s no subscription to upsell and no advertiser to satisfy, because the app isn’t trying to generate revenue from users at all. The full app is free, requires no account, and stores data on your device rather than a company server by default. Beyond period tracking, Euki also includes broader reproductive health resources, reflecting its nonprofit mission rather than a narrower commercial product focus.
Because it isn’t a venture-funded product, Euki doesn’t have the large content library or predictive sophistication of apps like Flo or Clue — its strength is trustworthiness and simplicity rather than feature depth.
Good for: Anyone who wants a genuinely free, no-account, on-device tracker with no commercial motive behind it. Not ideal for: Users who want advanced prediction algorithms or an extensive content library.
Flo
Flo has the widest free feature set of any major period tracker — cycle and symptom tracking, an extensive content library, community forums, and an AI chat assistant are all available without paying, which is a big part of why it’s the most downloaded period tracker in the world. If breadth of free features is your main criterion, Flo wins on paper.
The context worth knowing: Flo settled with the FTC in 2021 over sharing period and pregnancy data with Facebook and Google, and faced a $56 million class action settlement in 2025 over the same underlying practices. The company has since added an opt-in Anonymous Mode that disconnects logged data from your identity, which is a real improvement, but it isn’t the default — you have to know to turn it on. Its free tier’s business model has historically relied more on data partnerships and advertising than Clue’s or Cora’s subscription-first approach, which is the trade-off behind that larger free feature set.
Good for: People who want the most feature-rich free experience and a large community, and who turn on Anonymous Mode. Not ideal for: Anyone whose top priority is a company with a clean data-sharing history.
Spot On
Spot On is Planned Parenthood’s period and birth control tracker, and it’s free in the fullest sense: no subscription tier, no account required, no ads. It’s funded by Planned Parenthood as part of its broader reproductive health mission rather than needing to generate revenue from the app itself, which removes the usual free-app trade-off almost entirely. Alongside cycle tracking, it includes birth control method tracking and reminders, which is a feature most general trackers don’t offer at all.
Because Spot On isn’t trying to compete on content library size or AI features the way commercial apps are, it’s a more focused tool — strong at cycle and method tracking specifically, without the broader lifestyle or symptom-correlation features some other apps build out.
Good for: Genuinely free, ad-free tracking with birth control method tracking built in, backed by a healthcare nonprofit. Not ideal for: Anyone who wants an extensive content library or deep symptom-and-lifestyle correlation features.
Which Free Period Tracker Should You Use?
- Want solid free tracking with an optional paid upgrade for deeper insight: Clue
- Want free tracking that already handles irregular or PCOS-related cycles well: Cora
- Want fully open-source software with no account and no company involved: Drip
- Want a no-account, on-device app with no commercial motive: Euki
- Want the widest free feature set and don’t mind a mixed privacy history: Flo
- Want a nonprofit-backed app with birth control tracking built in: Spot On
Frequently Asked Questions
Are free period tracker apps actually safe to use? It depends entirely on the individual app’s funding model and privacy practices, not on whether it’s free. Nonprofit-funded and open-source apps (like Euki, Drip, and Spot On) tend to have the cleanest track records since there’s no advertiser or data buyer to satisfy. Commercial free apps can be safe too, but it’s worth checking their specific privacy policy and history before assuming “free” means “no cost to you.”
Why do some free period trackers ask you to create an account and others don’t? Account-based apps generally store your data on a company server, which enables features like cross-device sync and cloud backup, but also means your history exists somewhere beyond your phone. Account-free apps typically store data only on-device, which limits some conveniences but keeps your data more contained.
Do free period trackers work well for irregular cycles? It varies more by the app’s underlying prediction model than by whether it’s free. A free tier built around a simple 28-day calendar average will struggle with irregular cycles regardless of price; an app built to learn your actual range, like Cora’s free tier, tends to perform better even before any upgrade.
Is it worth paying for a period tracker if free options exist? It depends on what you need. If simple cycle logging and a reasonable prediction are enough, a free tier from Clue, Euki, Spot On, or Drip likely covers it. If you want deeper features — food tracking, movement plans, advanced pattern analysis, or doctor-ready summaries — those tend to sit behind a paid tier across most apps, Cora included, so the free version is usually best treated as a way to test the fit before deciding.
What’s the difference between a freemium app and a genuinely free app? A freemium app (Clue, Cora, Flo) offers real functionality for free but reserves some features for paying subscribers, funding the company through that subscription. A genuinely free app (Drip, Euki, Spot On) has no paid tier at all, funded instead by a nonprofit mission, volunteer maintenance, or another source entirely outside the app itself.
