Terms of sale and use

Version of November 9, 2026.

These terms apply to the Fern subscription, to credit packs and to the use of the plugin and of the fern.zaapee.fr website. You accept them by creating an account or by paying. The version that applies to a purchase is the one in force on the day of payment.

1. Who sells

Fern is published and sold by Romain Sapet, sole proprietor (entrepreneur individuel, EI) trading as Zaapee Studio, 6 rue d'Empêchy, 26250 Livron-sur-Drôme, France, SIREN 981 910 524 (VAT not applicable, article 293 B of the French General Tax Code), hereinafter "the publisher". Contact: contact@zaapee.fr.

2. What the service does

Fern is a plugin for FL Studio on macOS. Placed on the Master, it measures up to 125 mixer tracks and the Master. You ask it questions in plain language; it answers using Claude, a model by Anthropic, and can propose changes to your project (levels, plugin settings, playlist, automation, etc.).

System requirements: a Mac running macOS 11 (Big Sur) or later, and at least the macOS version required by your FL Studio, a version of FL Studio listed as compatible on the download page, and an Internet connection for Claude's answers. FL Studio is not included: it is obtained separately from Image-Line.
What Fern changes: by default, a change is applied only if you click "Apply". In YOLO mode, which you turn on yourself and which turns off each time the plugin is loaded, Fern applies its changes without asking you, within the scope of your request.
What Fern does not guarantee: Claude's answers are generated automatically and may be inaccurate or may not suit you. Listen to the result before keeping it, and save your project. You remain the sole judge of your mix.

3. Account

An account is required to use the plugin. It is personal: do not share your login details. You must be 18 or older, or have the consent of a person with parental authority to pay. You connect the plugin to your account from the plugin: sign-in opens in your browser.

4. Subscription and credits

Subscription. The subscription is monthly and renews every month on the anniversary date until cancelled. Its price is shown on the website before payment, without VAT: VAT not applicable under article 293 B of the French General Tax Code. Payment is made by card or by another method offered by Stripe, at the start of each subscription month.

Credits. Each paid month adds to your account the number of credits stated in the offer at the time you subscribed. Each exchange with Claude uses credits according to its actual cost (tokens read and written by the model). The plugin shows your balance. Measurements and mix monitoring, computed on your Mac, do not use credits. A single message cannot use more than the equivalent of 2 US dollars of model usage cost: beyond that, Fern stops and tells you.

Rollover. Unused credits stay on your account. Your balance cannot, however, exceed the equivalent of the number of months of credits shown in the offer: a monthly grant that would exceed it is reduced accordingly. Credits bought in a pack count toward this balance: if your balance is already at the cap, the next monthly grant is reduced or skipped until you have used some of it.

Packs. Subscribers can buy credit packs as a one-time payment. A pack's credits are added to the balance.

Nature of credits. A credit is a unit of use of the service. It has no monetary value, is not refundable (except under the right of withdrawal, section 6), cannot be converted into money and cannot be transferred to another account.

Price changes. A change to the offer (price, credits per month, rollover) does not apply to current subscriptions: you keep the price and credits of your subscription. If the publisher ever had to change a current subscription, it would notify you by email at least 30 days in advance, and you could cancel at no cost.

5. Cancellation

You can cancel at any time from My account, on the website. Cancellation takes effect at the end of the current subscription month, which is already paid: no further month is charged and no more credits are added. Until that date, your balance remains usable. After that, the plugin no longer has access. Remaining credits are not refunded; they stay attached to the account and become usable again if you resubscribe.

If a payment is declined, Stripe retries the charge. Without payment, access ends at the end of the period.

The publisher may suspend or close an account in the event of a serious breach of these terms (fraud, account sharing, use contrary to section 7), after writing to you, except in an emergency. Amounts already paid for the current period are then refunded on a pro rata basis, except in case of fraud.

6. Right of withdrawal (consumers)

If you are a consumer, you have 14 days from payment to withdraw, without giving a reason, by writing to contact@zaapee.fr or by using the form below.

The service starts upon payment if you expressly request it when ordering, by ticking the box shown before payment. In that case, if you withdraw within the 14 days, the publisher refunds the amount paid minus the value of the credits already used (article L221-25 du Code de la consommation, the French Consumer Code). If all the credits of the month or of the pack were used before your request, the service has been fully performed and the right of withdrawal no longer applies (article L221-28, 1°).

The refund is made within 14 days of your request, using the payment method you used.

Withdrawal form: "To [publisher, address, email]: I hereby give notice that I withdraw from the contract for [the Fern subscription / the credit pack], paid on [date], in the name of [name], account email address [email]. Date and signature (if on paper)."

7. Permitted use

You agree to use Fern to work on your own music projects or on those you have the right to work on, and to comply with Anthropic's usage policy (anthropic.com/legal/aup). It is forbidden to circumvent credit counting, to use the access to Claude provided by Fern for anything other than the plugin, to resell access or to deliberately overload the service.

8. Ownership

The plugin, the website and their content belong to the publisher. The subscription gives you a personal, non-exclusive and non-transferable right to use the plugin for its duration. Your projects, your tracks and your texts remain yours: Fern acquires no rights over them.

9. Availability and updates

The publisher does its best to keep the service running continuously but cannot guarantee it: answers also depend on Anthropic and on your connection. An interruption of more than 72 consecutive hours attributable to the publisher entitles you, on request, to compensation proportionate to the length of the interruption.

Fern evolves: new versions of the plugin are published on the website and announced by email. An Image-Line update may make a version of FL Studio incompatible with Fern until Fern is adapted. Compatible versions are listed on the download page.

10. Liability

The publisher is liable for direct damage caused by a failure to meet its obligations. It is not liable for:

changes you applied to your project, nor those applied in YOLO mode within the scope of your request;
loss of unsaved project data: save your projects regularly;
a malfunction of FL Studio, macOS or a third-party plugin.

These limits do not apply in case of gross negligence or intentional misconduct, nor to the rights the law guarantees to consumers, in particular the legal guarantee of conformity for digital content and services (articles L224-25-1 et suivants du Code de la consommation, the French Consumer Code).

11. Personal data

The processing of your data is described on the Privacy page.

12. Disputes

These terms are governed by French law. If a problem arises, first write to contact@zaapee.fr. If no solution is found, you can use the consumer mediator (médiateur de la consommation, a free out-of-court dispute resolution service required by French law) at no cost: [To be completed: name, website and address of the consumer mediator]. Failing agreement, the dispute falls under the jurisdiction of the competent courts; if you are a consumer, the courts of your place of residence may also hear the case.

This English version is a translation. The French version prevails.