Questions or feedback? Email us at [email protected]Privacy Policy · Terms of Service
© 2026 Cianan Studios Ltd.
Registered in England & Wales No. 17111297

Follicle

The short version: Follicle keeps most of your data on your device. Your treatment logs, progress photos, streaks, and routine data are stored locally and never uploaded to any server.Two things do leave your device. First, we use RevenueCat to operate the subscription side of the app — the free trial, paid plans, and "restore purchase" all run through it. Second, if you agree on first launch, we send anonymous usage events to PostHog so we can understand how the app is used and improve it. You can turn analytics off at any time from Settings.No names, no email addresses, no account. Follicle has no login system.

SECTION 1

Who we are

Follicle is developed and operated by Cianan Studios Ltd, a company registered in England and Wales. We are the data controller for any personal data processed in connection with the app.You can contact us at [email protected] for any privacy-related queries or requests.

SECTION 2

What data we collect and where it lives

Most of what Follicle stores never leaves your device. Here's a full breakdown:

We do not collect your name, email address, phone number, or any account credentials. There is no account system in Follicle.

SECTION 3

Progress photos

Photos you take within Follicle are saved directly to your device's private app storage. They are never uploaded, shared, or transmitted anywhere. They are only accessible within the Follicle app.If you delete the app, your photos will be permanently deleted along with it. We recommend backing up any photos you wish to keep before uninstalling.

SECTION 4

Analytics — PostHog

We use PostHog to collect anonymous analytics that help us understand how the app is used, identify problems, and improve the experience.Analytics are off until you agree to them. The first time you open the app you'll see a short notice asking whether we can collect anonymous usage data. If you tap "No thanks", PostHog is never loaded on your device and no events are sent. If you tap "That's fine", analytics start running and you can turn them off again at any time from Settings → Analytics. Turning them off stops collection immediately.When analytics are on, PostHog receives the following:

Device information — device type, operating system version, app version, screen size, and locale. This is collected automatically by the PostHog SDK.Usage events — actions like opening the app, logging a treatment, completing a day, saving or updating a regimen, taking or deleting a progress photo, comparing photos, viewing a screen, opening an in-app article, changing your notification times, or interacting with the paywall.Treatment names — when you open a page in the in-app treatment library (for example the page on minoxidil or finasteride), the treatment identifier is included as a property on that event so we can tell which library pages are being read. Your regimen itself is described to PostHog as a count of treatments, not by name.Milestone reflections — at weeks 6, 12, and 24 the app shows a short prompt asking whether you feel your treatment is working. Your answer ("yes" or "not yet") and which milestone it relates to are included on the corresponding event. We do not record free-text responses and we do not tie the answer to specific treatment names.A persistent device identifier — a randomly generated ID created on first launch and stored on your device. This is used to associate analytics events across sessions. It is not linked to your name, email address, or any other personal information.

SECTION 5

Subscriptions — RevenueCat

Follicle offers a free trial and paid monthly and annual plans. We use RevenueCat to handle this because it manages Apple in-app purchase receipts, restore-purchase flows, and subscription status in one place.RevenueCat runs every time the app is launched, not only when you open the paywall. The app needs to know on every screen whether you have an active subscription, and RevenueCat is how it finds out. This means RevenueCat operates outside the analytics notice — it is part of the subscription feature itself, not an analytics tool. If you never open the paywall and never subscribe, RevenueCat still confirms to the app that you have no active purchase.When the app talks to RevenueCat, RevenueCat receives:

RevenueCat processes this data on servers in the United States. You can read RevenueCat's own privacy policy at revenuecat.com/privacy.Our lawful basis under UK GDPR is performance of a contract: if you start a free trial or a paid plan, we need RevenueCat to operate that subscription on your behalf. For users who never subscribe, the processing is limited to the handshake required to confirm that no subscription exists, and our lawful basis is our legitimate interest in offering a working free tier.To stop this processing, uninstall the app. Because there is no account, there is nothing to "log out" of.

SECTION 6

Health data

Follicle does not connect to Apple Health or any other health platform, and does not write data to HealthKit.The treatments you log within Follicle (such as minoxidil or finasteride) are stored only on your device and treated as private personal data. As noted above, treatment names may appear in anonymous analytics events — this does not include your personal log history.Follicle is not a medical device and does not provide medical advice. The app is a routine and consistency tool only. Always consult a qualified healthcare professional before starting or changing any treatment.

SECTION 7

Your rights

Under UK GDPR and the Data Protection Act 2018, you have the right to:Access — request a copy of any personal data we hold about you.Erasure — request deletion of your personal data. Because your data is stored on your device, you can delete it at any time using the Delete all my data option in the app's Settings screen, by clearing the app's data in your device settings, or by uninstalling the app. For analytics data held by PostHog, or subscription data held by RevenueCat, contact us and we will submit a deletion request on your behalf.Portability — request your data in a portable format.Objection — object to analytics processing. You can turn analytics off yourself at any time from Settings → Analytics; this stops collection immediately. If you also want the events PostHog has already received from your device to be deleted, contact us and we will submit a deletion request on the anonymous device identifier associated with your installation.To exercise any of these rights, email [email protected]. We will respond within 30 days.

SECTION 8

Data retention

All on-device data is retained until you delete the app or clear its storage. We have no ability to delete on-device data remotely.Analytics data held by PostHog is retained for up to 12 months, after which it is automatically deleted.Subscription data held by RevenueCat is retained according to RevenueCat's own retention policy, which covers the lifetime of your subscription record plus any period needed to support Apple receipt validation and billing-dispute handling. See revenuecat.com/privacy for their current terms.

SECTION 9

Children

Follicle is not directed at children under the age of 13. We do not knowingly collect personal data from children. If you believe a child has provided personal data through the app, please contact us and we will take steps to delete it.

SECTION 10

Changes to this policy

We may update this policy from time to time — for example, when we introduce new features such as cloud backup or account creation. When we do, we will update the date at the top of this page and, where the changes are significant, notify you within the app.We recommend checking this page periodically if you want to stay informed.

SECTION 11

Contact

For any questions about this privacy policy or how we handle your data, please contact:

Cianan Studios LtdRegistered in England and Wales No. 17111297Email: [email protected]

Follicle

If something isn't working or you have a question, we're happy to help — just get in touch. Email us at:[email protected]We'll get back to you within 3-5 business days.

Follicle

Welcome to Follicle. These terms are the agreement between you and Cianan Studios Ltd ("Follicle", "we", "us", "our") when you download or use the Follicle iOS app. Please read them. If you don't agree with them, don't use the app.We've tried to keep them plain. Where the wording has to be precise for legal reasons, it is. Where we've had to include things Apple requires, they are in section 14. If you are in the UK, the US, or somewhere else, section 15 explains which local rules also apply to you.

1. Who we are

Follicle is operated by:
Cianan Studios Ltd, a company registered in England and Wales (company number 17111297), with its registered office at 71–75 Shelton Street, Covent Garden, London WC2H 9JQ, United Kingdom.You can reach us at [email protected] or at the address above.

2. What Follicle is (and isn't)

Follicle is a consistency tool. It helps you stick to a hair-loss treatment routine — by reminding you, by letting you log what you've done, and by letting you take progress photos over time.Follicle is not a medical device. It does not diagnose any condition, does not decide what treatment is right for you, does not monitor your health, and does not recommend that you start or stop any medicine. The information in the app's treatment library is educational, drawn from published research, and is not personalised advice.Follicle is not a substitute for a doctor. Before you start, change or stop any treatment — prescription or over-the-counter — talk to a suitably qualified healthcare professional. Only a clinician can tell you whether a particular treatment is suitable for you, and only a clinician can prescribe the prescription-only medicines referenced in the app.If something worries you, stop and get help. If you experience side effects or symptoms that concern you, stop the treatment and speak to your doctor.

3. Who can use Follicle

You can use Follicle if you are at least 18 years old. If you're under 18, please don't create a regimen or subscribe. If you're helping someone under 18 think about hair loss, involve a parent, guardian, or GP — not this app.You also agree to Apple's standard App Store terms when you download the app from the App Store. Those terms apply in addition to ours.

4. Your subscription and billing

Follicle is paid for by subscription, with a 14-day free trial for new subscribers.Trial. During the trial you have full access at no charge. If you cancel at least 24 hours before the trial ends, you won't be billed.Auto-renewal. When the trial ends, your subscription renews automatically at the price shown in the App Store when you subscribed (for example, a monthly or annual plan). It keeps renewing until you cancel. Your Apple account is charged within 24 hours of the end of the current period.How to cancel. Cancel any time in Settings → [your Apple ID] → Subscriptions on your iPhone, or in the Follicle app under Settings → Manage subscription. Cancelling stops future renewals. You keep access until the end of the period you've already paid for.Price changes. If the price goes up, Apple will ask you to confirm you consent to the new price before your next renewal; if you don't consent, your subscription won't renew. If the price is the same or lower, or if the increase is small enough that Apple doesn't require your consent, we'll tell you in the app before it takes effect and you can cancel at any time if you don't want to continue.Payment details. Apple processes all payments. We don't see or store your card details.

5. Refunds and your legal rights

Asking Apple for a refund. Because Apple bills you, the easiest way to request a refund is through Apple. Go to reportaproblem.apple.com, sign in with your Apple ID, find the Follicle charge and choose "Request a refund". Apple decides whether to grant it, based on its own policies.Your legal rights are separate and additional. Apple's refund process doesn't replace the rights you have under the law where you live. For example:

If you think Follicle is faulty and Apple won't help, email us at [email protected] and we'll work with you — and, where relevant, with Apple — to sort it out.

6. What you can and can't do with Follicle

Follicle is for your personal, non-commercial use. When you use it, please don't:

We can suspend or close your access if you break these rules.

7. Your content and your photos

You own what you create in the app. That includes your regimen, your daily logs, your notes, and your progress photos.Your photos stay on your device. Follicle never uploads your photos to our servers. We never access, view or store them. They live in the app's local storage on your iPhone. They are deleted when you use "Delete all my data" in Settings, or when you delete the app. If you change devices, your photos don't move with you — they stay on the device that took them.Licence to us. For any data you do create that we need to process in order to run the app (for example, your account email, your subscription status, your treatment choices stored in sync with your account if we add cloud sync in future), you grant us a worldwide, non-exclusive, royalty-free, sub-licensable (only to service providers who help us run the app) licence to host, store, copy, display, transmit and process it — only so we can provide the app's features to you. This licence ends when you delete the content or stop using the app, except for the narrow exceptions we set out in our Privacy Policy (for example, records we're required to keep for tax or for Apple's transaction reconciliation).Our content. The app itself, the treatment library, the Follicle name, and the app's visual design belong to us (or to the people who have licensed them to us). You get a personal right to use the app under these terms. You don't get any other rights to our content.We do not sell or market your health data. We do not sell, and we do not use for advertising, any health or treatment information you enter into Follicle. Your photos never leave your device. Your regimen data is used only to operate the app for you.

8. No promises about outcomes

Hair loss is complicated, and individual results vary. Genetics, age, the stage of the condition, how consistently you follow a treatment and many other things all matter.We make no promise that using Follicle, or following any particular regimen you log inside it, will produce a particular result for you. The app helps you track and manage your routine. It does not promise hair growth, thickness, density, or any other specific outcome. We try to represent the evidence in the treatment library fairly, but the evidence itself has limits, and we say so where they matter.

9. Your personal data

Cianan Studios Ltd is the "controller" of personal data processed through the app — except for your photos and on-device logs, which stay on your device and which we never see or access.The personal data we do process (for example, your subscription status, crash reports and usage analytics) is described in full in our Privacy Policy at https://getfollicle.app/privacy. The Privacy Policy explains what we collect, why we collect it, the legal bases we rely on, how long we keep it, who we share it with, and how you can exercise your rights.Your rights depend on where you live. In general you can:

If you're in the UK you also have the right to complain to the Information Commissioner's Office (ico.org.uk). If you're in the EU, you can complain to your national data protection authority. If you're in California, you have additional rights under the California Consumer Privacy Act and the California Privacy Rights Act — the Privacy Policy explains how to use them.The "Delete all my data" option in the app removes on-device data (including your photos). If you also want us to delete the personal data we hold off-device, email us at [email protected] and we will do so, subject to the narrow exceptions set out in the Privacy Policy.

10. Our responsibility to you

Nothing in these terms limits or excludes our liability for:

Subject to that, our total liability to you — whether in contract, in tort (including negligence), for breach of statutory duty, or otherwise — arising out of or in connection with your use of Follicle, is limited to the greater of:

Subject to the opening paragraph, we are not liable to you for business losses. This includes lost profits, lost revenue, lost business, or lost business opportunity. Follicle is an app for personal use; if you're using it for a business purpose, our liability for that use is limited to the fees you have paid.

11. Ending your access

You can stop using Follicle at any time. To stop being charged, cancel your subscription in your App Store settings (section 4). To remove your on-device data, use "Delete all my data" in Settings and delete the app. To have us delete off-device data we hold about you, email us (section 9).We may suspend or end your access if:

12. Changes to these terms

We may update these terms. There are two categories:Minor changes — for example, updating contact details, fixing typos, or rewording without changing your rights — take effect when we update the "Last updated" date at the top.Material changes — for example, changes to pricing rules, data-handling, or your rights under sections 7, 9 or 10 — take effect 30 days after we notify you in the app, and we will ask you to agree to them before they take effect against you. If you don't agree to a material change, you can cancel your subscription without penalty before it takes effect; these current terms continue to apply until your paid period ends.

13. Governing law and where you can bring a claim

These terms, and any dispute arising out of or relating to them or your use of Follicle, are governed by the laws of England and Wales. The courts of England and Wales have non-exclusive jurisdiction over any dispute.That means:

14. Apple-specific terms

These terms apply to your use of Follicle on an Apple device. Apple requires them to be set out.(a) Parties. These terms are between you and Cianan Studios Ltd only, not with Apple. Cianan Studios Ltd, not Apple, is solely responsible for Follicle and its contents. These terms do not provide for usage rules for Follicle that conflict with the Apple Media Services Terms and Conditions.(b) Scope of licence. Your licence to use Follicle is non-transferable and is limited to use on any Apple-branded product that you own or control, subject to the Usage Rules set out in the Apple Media Services Terms and Conditions. Follicle may, however, be accessed and used by other accounts associated with you through Apple Family Sharing, volume purchasing, or Legacy Contacts.(c) Maintenance and support. Cianan Studios Ltd is solely responsible for providing maintenance and support for Follicle. Apple has no obligation to furnish any maintenance or support for it.(d) Warranty. Cianan Studios Ltd is solely responsible for any product warranties, whether express or implied by law, to the extent not effectively disclaimed. If Follicle fails to conform to any applicable warranty, you may notify Apple and Apple will refund the purchase price (if any) of Follicle to you. To the maximum extent permitted by law, Apple has no other warranty obligation whatsoever with respect to Follicle, and any other claims, losses, liabilities, damages, costs or expenses attributable to any failure to conform to any warranty will be our sole responsibility.(e) Product claims. Cianan Studios Ltd, not Apple, is responsible for addressing any claims by you or any third party relating to Follicle or your possession and use of it, including (i) product liability claims, (ii) any claim that Follicle fails to conform to any applicable legal or regulatory requirement, and (iii) claims arising under consumer-protection or similar legislation.(f) Intellectual property. If any third party claims that Follicle or your possession and use of Follicle infringes that third party's intellectual property rights, Cianan Studios Ltd (not Apple) will be solely responsible for the investigation, defence, settlement and discharge of the claim.(g) Legal compliance. You represent and warrant that (i) you are not located in a country that is subject to a US Government embargo or has been designated by the US Government as a "terrorist supporting" country, and (ii) you are not listed on any US Government list of prohibited or restricted parties.(h) Developer details. The developer of Follicle is Cianan Studios Ltd, 71–75 Shelton Street, Covent Garden, London WC2H 9JQ, United Kingdom. Questions, complaints or claims about the app should be directed to [email protected] or to the address above.(i) Third-party terms. You must comply with applicable third-party terms when using Follicle, including your wireless carrier's terms and Apple's App Store terms.(j) Third-party beneficiary. You and Cianan Studios Ltd acknowledge and agree that Apple, and Apple's subsidiaries, are third-party beneficiaries of these terms, and that on your acceptance of these terms Apple will have the right (and will be deemed to have accepted the right) to enforce these terms against you as a third-party beneficiary.

15. Region-specific information

If you live in the United Kingdom

Your statutory rights under the Consumer Rights Act 2015 apply in addition to, and are not affected by, these terms. In particular, digital content supplied to you must be of satisfactory quality, fit for any particular purpose you have made known to us, and as described.We do not currently participate in an alternative dispute resolution (ADR) scheme. If you have a complaint, please email us at [email protected] with the detail, and we will respond within 10 working days and try to resolve it. If you're not happy with how we handle it, you have the right to take the matter to your local court.If your complaint is about how we handle your personal data, you can also complain to the Information Commissioner's Office (ico.org.uk).

16. Contact us

Cianan Studios Ltd
71–75 Shelton Street
Covent Garden
London WC2H 9JQ
United KingdomEmail: [email protected]Company number: 17111297We read every message and aim to reply within five working days.