What happened to Clue

Clue launched in 2012 with a simple promise: science-backed cycle tracking in a clean, respectful interface. No pink butterflies, no fertility-focused assumptions, no patronising language. For years, it delivered.

Then came Clue Plus.

The premium tier wasn't the problem. Apps need revenue, and subscriptions are a fair way to fund ongoing development. The problem was how Clue Plus was introduced — and how aggressively it was pushed.

Features that were previously free moved behind the paywall. The app started surfacing premium prompts at every turn. Open the app: upgrade banner. Try to view your analysis: that's a Plus feature now. Check your history: here's what you could see if you paid.

One Google Play reviewer put it plainly: the app now has constant popups pushing the premium version with every click, and because it holds their tracked data from previous years, switching feels impossible. They described it as feeling trapped.

That word — trapped — comes up more often than you'd expect in reviews of an app people used to love.

The upselling problem isn't just annoying

There's a psychological cost to being asked to pay every time you open a health app. It turns a moment of self-care into a transaction negotiation. Instead of thinking about your cycle, you're thinking about whether you should upgrade, whether the premium features are worth it, whether you're missing something important by not paying.

For a lot of users, the result isn't that they upgrade. It's that they open the app less. The gentle daily habit of logging — which is the entire point of cycle tracking — gets disrupted by the friction of being sold to.

This is especially damaging for users with ADHD, who already struggle with app consistency. Adding a cognitive interruption between opening the app and actually logging is exactly the kind of friction that kills the habit entirely. If you're curious about how ADHD intersects with cycle tracking, we've written about that in more detail.

What Clue gets right

If you're looking for a Clue alternative, it's worth being honest about what made Clue good in the first place — so you don't accidentally trade down.

Clue's tracking is thorough. The ability to log dozens of symptoms, moods, and physical indicators across your cycle is genuinely useful for anyone tracking seriously. The data visualisation is clean and makes patterns visible over time.

Clue is EU-based and GDPR-compliant, which means it operates under stricter data privacy rules than US-based competitors. It's not perfect — a 2022 report found Clue user device data available on a commercial data marketplace — but its privacy posture is generally stronger than Flo's.

Clue's algorithm is well-regarded. Predictions improve with use, and the science behind them is peer-reviewed and transparent.

So when switching, look for an app that matches or beats Clue on: clean interface, reliable predictions, meaningful symptom tracking, and reasonable privacy practices. Don't settle for less just because you're frustrated.

What a Clue alternative should actually offer

Beyond matching Clue's strengths, a genuinely better alternative should fix the things Clue gets wrong.

A free tier that's actually complete. Not a demo that nags you into paying. The core features — cycle logging, symptom tracking, predictions, calendar view — should work fully without a subscription. If the app makes the free experience deliberately frustrating to drive upgrades, the company values conversion over care.

No account required. Clue requires an email, Google, Facebook, or Apple sign-in before you can track a single day. An app that's genuinely privacy-first shouldn't need to know who you are before it lets you log a cramp. Our guide to which apps work without an account explains why this matters more than most people realise.

Data portability. If you've been tracking in Clue for years, you shouldn't have to start from zero. An alternative worth switching to should let you import your Clue data so your history comes with you.

Respect as a design principle. This one's harder to quantify but easy to feel. Does the app treat you like a user or a conversion target? Does it let you use it in peace? Does it earn your upgrade through value rather than frustration?

The real test of a free tier: Can you use the app daily for six months without ever feeling like you're missing something important? If the free version creates anxiety about what you're not seeing, the app is using frustration as a sales tool.

Making the switch

Leaving an app that holds years of your data feels like a bigger decision than it is. Here's what the process actually looks like.

First, export your data from Clue. Go to Settings, then Download my data, then Request data. Clue will generate a file with your cycle history.

Second, choose your alternative and import that file. Some apps support direct import from Clue, which means your period dates, symptoms, and logs transfer automatically.

Third, use both apps in parallel for one cycle. Log in both for a month. By the end, you'll know whether the new app feels right — and you won't have lost any data if you decide to go back.

The fear of switching is almost always bigger than the reality. And if the reason you're staying is that the app makes leaving feel difficult, that tells you something important about the relationship.

For more on what to check before trusting any app with your cycle data, our plain-English guide to period tracker data privacy covers the technical side in detail.

What respect looks like in practice

The pattern keeps repeating: people love tracking their cycle, but the apps that help them do it keep finding new ways to erode trust. Flo sold data. Clue made its free users feel like second-class citizens. Others just disappeared or stopped being maintained. That’s the gap Ferne was built to fill.

We built Ferne around a few principles that directly address these problems. No login needed. All data stays on your phone. A free tier that includes everything you need for daily tracking — period logging, symptoms, mood, energy, notes, calendar, predictions. Premium exists for users who want deeper insights, but the free experience is never degraded to push you toward it.

You can import your data from Clue (and from Flo) so your history doesn't start at zero. And if you ever want to leave Ferne, one-tap CSV export means your data goes with you.

We don't ask you to trust us with your data. We make it so that you don't have to.

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If you want a broader view of what is available, our comparison of the best private period trackers in 2026 covers the full landscape.

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