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Version 2.1 · Effective from 4 September 2026 · Replaces the version dated 13 July 2026
These terms cover your use of Multiplicity and CAИON, at multiplicity.fm and in the Multiplicity apps, which load the same service inside a native frame. Please also read our Privacy Policy, which explains how we handle your data.
Building your CAИON is free. Some depth is paid. If you pay, you have 14 days to change your mind and get a full refund. Monthly and Annual renew until you cancel, and you can cancel at any time from your Profile. Lifetime is a one time payment with no renewal, and it lasts for as long as we operate the service. Nothing here takes away rights you have by law.
Multiplicity is run by an individual trading as Multiplicity, established in the United Kingdom. It is not a limited company.
When these terms say "we", "us" or "our", they mean the above. When they say "you", they mean the person using Multiplicity.
You agree to these terms when you create an account, generate a CAИON, or buy a paid plan.
These terms replace the version dated 13 July 2026. If you bought a paid plan before 4 September 2026, please read section 7.4, which protects what you already bought.
Multiplicity turns the listening history you connect into a ranked CAИON of your Albums, Artists and Tracks, a monthly Rotation, records, rankings, annual editions and a taste identity. It is a reflective archive built from your own history. It does not stream or play music, and it does not tell you what to listen to next.
You choose which sources to connect and which files to upload. You confirm that the history is yours and that you have the right to connect it. We read it to build your surfaces, as described in the Privacy Policy. You can stop connecting a source, or delete your account, at any time.
Your CAИON is private by default. If you choose to create a share link or a public profile, the people you share it with can see the parts you have chosen to make public. Private source detail is never included in shared or saved editions.
Free. Building and keeping your Top 50 CAИON is free. No card is required.
Centurion and Vault are paid plans that open deeper access. Centurion can also be earned through referrals. What each plan includes is shown on the plans page before you buy.
We describe plans by the level of access they give. The specific surfaces and features inside a plan will develop over time, and section 12 explains the limits on how we may change them.
All prices are in pounds sterling and include any tax that applies. The price you see before you check out is the price you pay. Payments are processed by Stripe. We never see or store your full card details.
Purchases and plan changes happen on the multiplicity.fm website. No purchase can be made inside the Multiplicity apps.
You pay each month and it renews automatically until you cancel. You can cancel at any time from your Profile. Your access continues to the end of the month you have paid for.
You pay for twelve months and it renews automatically each year until you cancel. You can cancel at any time from your Profile. Your access continues to the end of the year you have paid for.
Lifetime is a one time payment. It never renews and creates no recurring billing. This purchase will not charge you again.
Lifetime access is tied to your Multiplicity account and lasts for as long as we operate the Multiplicity service. It is not tied to your own lifetime, and it does not transfer to another person or account.
We will not reduce the level of access you have bought. Individual features will change over time, as section 12 describes, and some depend on the music services you connect. But a Lifetime plan will not be downgraded to a lower level of access.
If you buy Lifetime while you have a subscription running, we cancel that subscription for you so you are never charged twice.
Section 14 explains what happens if we ever have to close the service.
Sections 7.1 to 7.3 describe what you get when you buy from 4 September 2026 onwards. They do not reduce anything you have already bought.
If you bought a paid plan before that date, and in particular if you bought Lifetime, the position that applied when you purchased continues to apply wherever it is more favourable to you than these terms. We are not taking away access you have paid for, and we are not reinterpreting your purchase. Writing the definition down is meant to make the bargain clearer for everyone, not narrower for you.
If you have any question at all about what you bought, email hello@multiplicity.fm.
We may change our prices. A price change never applies to a payment you have already made.
You have a legal right to cancel within 14 days of buying, and to get a full refund. This applies to Monthly, Annual and Lifetime alike.
Your paid access starts as soon as you pay, so that you get what you bought straight away. At checkout, we ask you to request that immediate start and to accept these terms before Stripe can take payment.
Multiplicity provides continuing access as well as generated digital content. The legal treatment of cancellation can differ between those kinds of supply. We do not claim that your immediate-start request takes away your statutory right to cancel. We preserve the full 14 day right and will refund you in full if you cancel within it, even though your access has already started.
To cancel, just tell us. Email hello@multiplicity.fm from your account email address, or use the form at the end of these terms. You do not have to give a reason. We will refund you using the same payment method you paid with, within 14 days of being told.
Beyond the 14 day right in section 8:
Go to your Profile and choose Manage billing and cancel. It takes one click, and you do not need to email or call anyone. Because you signed up online, you can always cancel online.
Lifetime has nothing to cancel. There is no renewal or recurring billing to stop.
If a subscription payment fails we do not cut off your access straight away. Stripe will retry, and we will let you know. If payment cannot be taken after those attempts, the subscription ends and your account returns to the free plan. Your archive is not deleted.
Multiplicity is actively developed. We may add, change, replace or remove features, and we may carry out maintenance.
We will only change or remove a feature that is part of a paid plan where there is a good reason to. Good reasons are:
We will not use this to materially reduce the overall value of a paid plan. If we do make a change that materially reduces what you are paying for:
You have rights under the Consumer Rights Act 2015 that these terms do not affect and cannot take away. Multiplicity gives you both a service and digital content, so both sets of rights are relevant:
For free, independent advice, contact Citizens Advice at citizensadvice.org.uk.
Multiplicity is run by one person. We intend to keep it running, and we should be honest with you about what happens if we cannot.
If we decide to close the Multiplicity service permanently:
Closing the service does not take away any right or remedy you have by law, including if you hold a Lifetime plan. Nothing in this section is an attempt to limit that.
Multiplicity reads listening history from services you connect, including Last.fm, Apple Music and Spotify, and uses other providers for artwork, metadata and the editorial writing. These are listed in the Privacy Policy.
Some of what Multiplicity can show you depends on those services. If one of them changes what it offers, or stops offering it, the features that rely on it can change too. We will use reasonable efforts to keep things working, or to find a replacement.
If one of those changes permanently and materially reduces what your paid plan gives you, the remedies in section 12 apply in the same way.
Your use of those services is also governed by their own terms.
You can stop using Multiplicity at any time and delete your account from within the product, under You and Profile at /account/delete.
We may suspend or end your access if you seriously or repeatedly breach these terms.
Multiplicity interprets your listening history to produce a ranking and an identity reading. It is a considered, evidence led view, not a factual score or an official record, and reasonable people may read the same history differently. We refine how surfaces are generated as the product develops.
The Multiplicity and CAИON names, brand, design and software are ours. Album, artist and track names, and any artwork, belong to their respective owners. Multiplicity is not affiliated with or endorsed by Apple Music, Spotify or Last.fm.
You keep your own listening history. We do not claim ownership of it.
We are responsible for loss you suffer that is a foreseeable result of us breaking these terms or failing to use reasonable care and skill.
We do not limit or exclude our responsibility in any way for:
We are responsible for the archive we hold for you. We do not exclude responsibility for loss of the listening history you uploaded to us, or of the surfaces we generated and stored for you, where that loss is caused by us. Preservation is what you came here for, and we are not going to disclaim it.
We are not responsible for:
Where our responsibility can lawfully be limited, it is limited to the greater of the amount you paid us in the 12 months before the problem arose, or the total amount you paid for a Lifetime plan.
We may update these terms. How we do it depends on the change.
Every published version of these terms is kept, so you can always find out what applied when you bought.
We may transfer these terms to another business, for example if Multiplicity becomes a limited company or is bought. If we do, we will tell you, and your rights under these terms, including Lifetime access, stay exactly the same. The new owner takes on all of our obligations to you.
How we handle your data is set out in the Privacy Policy.
If something is wrong, email hello@multiplicity.fm. We aim to reply within 5 working days.
If we cannot resolve it between us, you can get free independent advice from Citizens Advice at citizensadvice.org.uk. We do not currently take part in an alternative dispute resolution scheme.
These terms are governed by the laws of England and Wales, and any dispute will be handled by the courts of England and Wales. This does not remove any protection you have under the law of the country where you live.
Multiplicity is aimed at customers in the United Kingdom, and prices are in pounds sterling. If you buy from elsewhere, you are responsible for any local taxes or charges.
Complete and return this form only if you wish to cancel. You do not have to use it. An email to hello@multiplicity.fm is fine.