Terms of Service

Last updated: 31 August 2026

These Terms of Service (the Terms) govern access to and use of the Lydmera software service. They are an agreement between Lydmera Limited, a company incorporated in Guernsey with company number 78292, whose registered office is published on the Company information page (Lydmera, we, us), and the person or organisation using the Service (you, Customer).

If you use the Service for an organisation, you confirm that you have authority to accept these Terms for it. If you do not agree to these Terms, do not create an account or use the Service.

Purchases are processed by Paddle, which acts as the authorised reseller and Merchant of Record. Section 5 explains the separate roles of Paddle and Lydmera.

1. Definitions

Account means an account used to access the Service.

Business Customer means a Customer using the Service wholly or mainly for its trade, business, craft or profession.

Charges means amounts paid or payable for the Product under an Order, excluding tax and amounts refunded.

Consumer means an individual using the Service wholly or mainly for personal purposes outside their trade, business, craft or profession.

Customer Content means information, files, briefs, plans, drawings, specifications, project data and other material submitted to the Service by or for Customer.

Documentation means user guidance and technical information that Lydmera makes available for the Service.

Output means a calculation, result, report, schedule, diagram, narrative, export or other material generated by the Service from Customer Content and Customer selections.

Order means the plan, billing period, price and other purchase information confirmed through Paddle Checkout, Paddle Invoicing or a signed Business order form.

Paddle means the Paddle entity identified in the Paddle Buyer Terms for the buyer’s location.

Product means the Service and related access or add-ons made available for purchase through Paddle or an Order.

Service means the Lydmera hosted pool-engineering software, including its calculation, input-extraction, equipment-sizing, report and related features made available under an Account.

Subscription means time-limited access to a paid plan on a recurring basis, including any associated free trial.

2. Eligibility, authority and acceptance

You must be at least 18 years old to create an Account.

You accept these Terms by affirmatively selecting the acceptance control presented when creating an Account or otherwise entering an Order. Merely viewing the public website does not make you a Customer.

If you act for an organisation, that organisation is the Customer and is responsible for authorised users and their compliance with these Terms. Do not share individual login credentials. Features for multiple users or permissions apply only where the selected plan or Business order form expressly includes them.

The Service is designed and offered for professional pool, building-services and engineering work. A self-service purchaser must confirm that the purchase is made wholly or mainly for trade, business, craft or professional purposes. A person does not need to hold a particular professional title merely to explore the Service, but no Output may be applied to a real project without the competent professional review required by section 4 and the Engineering Disclaimer.

The Service is initially marketed in Guernsey and the United Kingdom. Availability of the website or checkout elsewhere does not remove mandatory law that applies to a Customer, and Lydmera does not exclude a right merely because a person accessed the Service from another country.

3. Accounts

You must provide accurate information, keep it current and protect your credentials. You are responsible for activity carried out through your Account except to the extent caused by Lydmera’s breach of these Terms or failure to use reasonable security measures.

Tell us promptly at security@lydmera.com if you believe an Account or credential has been compromised. We may require a credential reset or temporarily restrict access while we investigate a security risk.

4. Nature of the Service and professional responsibility

Lydmera is software, not an engineering consultancy, designer of record, equipment manufacturer, installer, building-control authority or professional certifier. The Service assists with calculations and documentation; it does not replace site investigation, complete design information, applicable codes or professional judgement.

You are responsible for:

• checking that inputs, extracted values, assumptions and units are complete and correct;
• deciding whether the calculation method and design conditions are suitable for the project and jurisdiction;
• checking equipment selections against current manufacturer data and site constraints;
• applying appropriate safety factors and coordinating structural, hydraulic, electrical, ventilation, water-treatment, controls and other specialist design;
• obtaining permits, approvals and professional sign-off; and
• ensuring that a competent person independently reviews each Output before it is used for specification, quotation, procurement, construction, installation or operation.

The Engineering Disclaimer forms part of these Terms. If these Terms and the Engineering Disclaimer conflict, these Terms control.

5. Orders, Paddle and taxes

5.1 Separate contracts

Paddle is the authorised reseller and Merchant of Record for self-service purchases. When you complete a transaction through Paddle:

• you contract with Paddle for the purchase, payment, applicable taxes, transaction cancellation and refund administration under the Paddle Buyer Terms and Paddle Refund Policy; and
• Lydmera supplies access to the Product under these Terms.

Those Paddle documents are presented or linked at checkout. They are not replaced by these Terms. If transaction information on the Lydmera site differs from Paddle Checkout, do not complete the purchase and contact billing@lydmera.com.

Lydmera does not receive or store your full card details. Paddle may share transaction and account information with Lydmera so that we can provide the Service and administer the Subscription, as described in the Privacy Notice.

5.2 Prices and taxes

The exact currency, price, discount, billing period, applicable tax and amount due are those displayed by Paddle before you confirm the transaction. Paddle calculates, collects and remits applicable sales taxes as reseller. A tax-exclusive figure on a business-pricing page is not the final amount where tax applies.

You are responsible for providing correct billing and tax information. A Business Customer seeking a permitted tax refund or exemption must follow Paddle’s process and time limits.

5.3 Renewals and price changes

Subscriptions renew automatically for the period shown in the Order until cancelled. Paddle charges the saved payment method on or after the renewal time stated in its Buyer Terms and sends renewal or price-change notices where required by law.

We or Paddle may change the price for a future renewal. A change does not alter a period already paid for. Where required, notice will be provided before renewal. You may cancel before the renewal takes effect.

5.4 Failed payment

If a payment fails, Paddle may retry it and notify you. Lydmera may restrict or suspend paid features while an amount remains unpaid and may end the Subscription if payment is not resolved. We do not promise a fixed retry schedule unless it is stated in a signed Business order form.

6. Free trials

Where Paddle Checkout offers it, a new Starter or Pro Subscription begins with a 14-day free trial with access to the Pro trial feature set. Payment details are required. The selected Starter or Pro paid plan begins automatically when the trial ends unless you cancel before the exact trial-end time shown by Paddle.

Paddle Checkout must show the following before you confirm:

• the plan that will begin after the trial;
• £0 due at the start of the trial;
• the exact first-charge amount, currency and applicable tax;
• the exact trial-end and first-charge date; and
• the recurring billing period.

If checkout does not show those facts, do not complete it. The static phrase “14 days” never overrides the exact date and time displayed by Paddle.

Paddle Checkout determines whether a person and price are eligible for a trial. Fraud, abuse or repeated account creation may also result in action under the Acceptable Use Policy. Cancelling before the trial ends prevents the first Subscription charge. Access ends when the cancellation takes effect as displayed in the Account or Paddle buyer portal.

7. Cancellation, withdrawal and refunds

7.1 Subscription cancellation

You can cancel through the billing controls in your Account, the Paddle buyer portal linked from your transaction email, or Paddle buyer support. Cancellation normally takes effect at the end of the current trial or paid billing period, as Paddle confirms. You will not be charged for a later renewal after cancellation takes effect.

7.2 Refund and withdrawal requests

Paddle handles transaction refunds and statutory withdrawal requests. Use the “Manage subscription” or receipt link in Paddle’s email, the billing link in your Account, or Paddle buyer support. Lydmera can assist with a product issue but cannot pay a Paddle transaction refund directly.

Paddle’s current Refund Policy includes, among other rules:

• a 14-day withdrawal period for eligible Consumers in the UK, EEA and Switzerland in relation to certain first payments and one-off digital transactions;
• a new 14-day period for an eligible Consumer when a free trial ends;
• a new 14-day period for an eligible UK Consumer when an annual Subscription auto-renews; and
• case-by-case discretionary refund powers.

Eligibility depends on the buyer’s status, location, transaction, use of the Product and applicable law. The Paddle Refund Policy in force for the transaction controls the Paddle process. Nothing in these Terms restricts a non-waivable right or remedy for a Product that is faulty, not as described or not supplied with legally required care and skill.

Business transactions are non-refundable except where the Order, Paddle’s policy, applicable law or Paddle’s discretion provides otherwise. Cancelling a Business Subscription does not create a right to a pro-rata refund for an already-started billing period.

If we agree that a Paddle refund should be made, we will instruct or support Paddle rather than send money to you directly. Paddle determines the payment route and processing time.

7.3 Product problems

Please first report a material technical problem to support through the Contact page and allow a reasonable opportunity to investigate. If it cannot be resolved, you may also use Paddle’s buyer-support and refund process. This does not delay or remove a mandatory right.

8. Plans, changes and AI credits

Features, usage limits, branding rights and allowances depend on the active plan shown on the Pricing page and in the Account. Public marketing does not add a feature that is not included in the Order.

When changing a paid plan, the confirmation screen must show when the change takes effect and any immediate charge or credit before you confirm. Paddle’s displayed proration or billing adjustment controls; these Terms do not promise a particular formula.

Included monthly AI allowances are used before purchased top-up credits and do not roll over. Purchased AI top-up credits:

• expire 12 months after purchase;
• require an active paid Subscription to use;
• remain attached to the Account through plan changes and, until expiry, may be used if an eligible paid Subscription is reactivated;
• have no cash value and cannot be transferred between Accounts; and
• are removed to the extent that the corresponding purchase is refunded.

The amount, price, expiry and these restrictions must be shown before purchase. If the pre-purchase information gives the buyer more favourable treatment, that treatment controls.

Refund rights for top-ups and other one-off purchases follow section 7 and the Paddle Refund Policy. A top-up is not categorically non-refundable where a mandatory right or Paddle’s applicable policy provides otherwise.

9. Licence and intellectual property

Lydmera and its licensors own the Service, Documentation, user interface, calculation software, report templates, branding and related intellectual property. These Terms do not transfer ownership of them.

During an active entitlement, Lydmera grants Customer a limited, non-exclusive, non-transferable right to access and use the Service for Customer’s internal professional or business purposes and to use Outputs in Customer’s own project work and client deliverables, subject to the selected plan, required branding and these Terms.

Where a plan expressly permits customer branding or white-label presentation, Customer may apply that presentation to Outputs. White-label presentation does not make Lydmera the engineer of record, transfer the underlying software or methodology, or remove Customer’s verification responsibility.

Unless applicable law prohibits the restriction, you must not:

• copy, sell, sublicense or provide the Service itself to a third party;
• share credentials or allow access outside the licensed Customer;
• reverse engineer, decompile or attempt to extract source code, prompts, protected methodology or model data;
• use automated extraction to build a competing product or dataset;
• remove required notices or branding from a plan that does not permit it; or
• use Outputs to imply professional review that did not occur.

If you give feedback, you grant Lydmera a worldwide, perpetual, royalty-free right to use it without identifying you or disclosing Customer Content.

10. Customer Content and Outputs

As between Customer and Lydmera, Customer retains its rights in Customer Content. Customer grants Lydmera and its approved service providers a non-exclusive right to host, copy, transmit, transform and otherwise process Customer Content only as needed to provide, secure, support and comply with law in relation to the Service.

Customer confirms that it has the rights and lawful basis needed to submit Customer Content and instruct its processing. Customer must minimise personal data and must not upload special-category data, criminal-offence data, payment-card data, credentials, export-controlled material or other regulated/sensitive information unless Lydmera has expressly agreed an appropriate workflow in writing.

Outputs depend on Customer Content, assumptions, third-party data and the software version. Customer owns any rights it may have in the original parts of an Output, subject to Lydmera’s rights in the Service, templates, methods, branding and pre-existing material. Lydmera does not promise that an AI-generated portion is protectable by intellectual-property law or unique to Customer.

Export formats and availability depend on the active plan and functions then provided. Customer should export material it needs before the Account or entitlement ends.

11. Data protection

The Privacy Notice explains how Lydmera acts as controller for Account, security, support and service-administration data.

Where Lydmera processes personal data contained in Customer Content solely on Customer’s documented instructions, Customer is normally the controller and Lydmera is the processor. If Customer itself processes that data for its client, Customer may be a processor and Lydmera a subprocessor. The Data Processing Addendum forms part of these Terms for that processing. Customer remains responsible for its authority, notices, lawful basis, instructions and responses to the people whose data it controls or processes.

Paddle is an independent controller for transaction data it processes as reseller. Paddle is not a Lydmera subprocessor for that activity.

12. AI-assisted features

Some features use third-party commercial AI services to extract information from documents or images or to generate draft narrative. Engineering calculations described as deterministic are produced by the calculation engine from the selected inputs, but an incorrect AI-extracted input can affect the calculation.

AI Output may be incomplete, inaccurate, ambiguous or unsuitable. You must check every AI-extracted value and AI-generated passage before accepting or using it. Do not rely on AI to identify every missing fact, hazard, code requirement or professional obligation.

The Privacy Notice and subprocessor register describe AI data handling. Lydmera will not opt Customer Content into third-party model training without giving required notice and obtaining any permission required by law or contract.

13. Confidentiality

Each party receiving non-public information from the other will use it only to perform or exercise rights under the agreement, protect it using reasonable care and disclose it only to people and providers who need it and are bound by confidentiality duties. This does not cover information that is public without breach, already lawfully known, independently developed or lawfully received without restriction.

A party may disclose confidential information where law requires it, where legally permitted after giving reasonable advance notice.

Lydmera will not use Customer’s name, logo, project details, quotation or testimonial in public marketing without prior permission. Customer may revoke prospective marketing permission; material already lawfully printed or published may remain in archival copies.

14. Acceptable use

Customer and its users must comply with the Acceptable Use Policy. Lydmera may investigate suspected misuse and take proportionate steps to protect the Service, users, third parties and legal compliance.

15. Availability, support and changes to the Service

We aim to keep the Service available and may perform maintenance, fix defects, change features or replace third-party providers. Internet and third-party services can fail. No public uptime percentage, recovery time, service credit or support-response target applies unless expressly included in a signed Business order form.

We will not materially reduce the core paid Service during a current prepaid Business term without a reasonable reason. If we permanently discontinue the entire paid Service before the end of a prepaid period, we will work with Paddle to provide an appropriate pro-rata refund for the unusable remainder, except where discontinuation results from Customer breach, law or an event outside reasonable control.

Beta or preview features may be changed or withdrawn and should not be used as the sole basis for a safety-critical decision.

16. Warranties and disclaimers

We will provide the Service with reasonable care and skill. If you are a Consumer, nothing in these Terms limits mandatory rights relating to digital content or services.

Subject to that sentence and to the fullest extent permitted by law, the Service and Outputs are provided on an “as available” basis. We do not promise uninterrupted or error-free operation or that an Output will be complete, accurate or fit for a particular real-world project without the review required by section 4.

Third-party services, manufacturer data, climate data and standards may change or contain errors. Lydmera is not responsible for a third-party service outside its reasonable control, but this does not remove responsibility that cannot lawfully be excluded.

17. Liability

17.1 Liabilities not limited

Nothing in these Terms excludes or limits liability for death or personal injury caused by negligence, fraud or fraudulent misrepresentation, deliberate unlawful conduct, or any liability or mandatory right that law does not allow to be excluded or limited.

17.2 Business Customers

For a Business Customer, Lydmera is not liable for indirect or consequential loss, loss of profit, revenue, anticipated saving, business opportunity, goodwill or data, or losses that could reasonably have been avoided by following the professional-verification requirements.

Subject to section 17.1, Lydmera’s total aggregate liability to a Business Customer arising from the Service or these Terms in any 12-month period is limited to the greater of £1,000 and the Charges paid or payable for the Product under Orders in the 12 months before the event giving rise to the claim, subject to a maximum of £10,000.

17.3 Consumers

For a Consumer, Lydmera is responsible for losses that are a foreseeable result of Lydmera’s breach or failure to use reasonable care and skill. Lydmera is not responsible for business losses where the Service was used for personal purposes, or for loss caused by information or instructions the Consumer supplied, failure to follow clear instructions, or use of an unverified Output in a real project. Mandatory consumer remedies remain unaffected.

18. Business-customer indemnity

This section applies only to a Business Customer. Customer will indemnify Lydmera against a third-party claim to the extent caused by Customer’s unlawful Customer Content, infringement of third-party rights, fraudulent claim of professional approval, or use of an Output in a real project contrary to section 4. The indemnity does not cover loss caused by Lydmera’s breach, negligence or unlawful act. Lydmera must give prompt notice and reasonable control of the defence, and Customer may not settle in a way that admits Lydmera’s fault without consent.

19. Suspension and termination

You may stop using the Service and cancel a Subscription under section 7.

We may suspend access where reasonably necessary to address an overdue payment, security risk, suspected fraud, unlawful activity, material AUP breach or legal requirement. Where circumstances allow, we will explain the reason and give a reasonable opportunity to remedy it.

Either party may terminate for a material breach that is not remedied within 14 days after written notice, where the breach can be remedied. We may act immediately for an urgent security threat, fraud, unlawful use, repeated serious misuse or where law or Paddle requires it.

When access ends, Customer should use any available export function promptly. Lydmera handles Customer Content under the Privacy Notice and DPA; these Terms do not promise restoration after scheduled deletion. Sections intended by their nature to continue—including intellectual property, confidentiality, liability, accrued payment obligations, data protection and governing law—survive.

20. Changes to these Terms

We may update these Terms to reflect law, security needs, third-party requirements or changes to the Service. We will give reasonable advance notice of a material change to registered Customers unless an urgent legal or security change requires earlier effect.

A materially adverse commercial change will normally apply from the next renewal, giving Customer an opportunity to cancel. If law requires fresh agreement, we will request affirmative acceptance rather than relying only on continued use. The version accepted for an Order remains available on request.

21. Governing law and disputes

For a Business Customer, these Terms and any non-contractual dispute are governed by Guernsey law and the Royal Court of Guernsey has exclusive jurisdiction.

For a Consumer, Guernsey law applies only to the extent it does not deprive the Consumer of mandatory protections under the law of the country where the Consumer habitually lives. A Consumer may bring proceedings in any court that applicable consumer law permits.

Before starting formal proceedings, please email legal@lydmera.com and allow 30 days for a good-faith attempt to resolve the issue, unless urgent relief or a limitation period requires earlier action.

22. General

These Terms, the Order, the Acceptable Use Policy, Engineering Disclaimer and—where applicable—the Data Processing Addendum form the agreement for the Service. The Privacy Notice and Cookie Policy explain data use; they are notices, not a mechanism for obtaining bundled consent.

If a signed Business order form conflicts with these Terms, the order form controls only for the subject it expressly changes. Paddle’s Buyer Terms and Refund Policy control the buyer-Paddle transaction.

Neither party is liable for delay caused by events outside reasonable control, but this does not excuse payment already due or a duty that law does not allow to be excluded.

If a provision is unenforceable, it will be adjusted only as much as needed and the rest remains effective. Delay enforcing a right is not a waiver. Customer may not transfer the agreement without Lydmera’s consent; Lydmera may transfer it as part of a genuine reorganisation or sale of the Service, subject to applicable data-protection and consumer law.

Notices to Lydmera under these Terms may be sent to legal@lydmera.com and, where formal postal service is required, to the registered office above. Operational notices may be sent to the Account email; keep it current.

23. Contact

• Product and support enquiries: use the Contact page
• Billing transaction, cancellation and refund support: use the Paddle buyer portal or Paddle support linked from the transaction email
• Legal notices: legal@lydmera.com
• Privacy: privacy@lydmera.com
• Security: security@lydmera.com