Terms of Service

1. Who we are, and these Terms

Proof Chain (the "App") is operated by Mirsadra Molaei, an individual trading as Parkinsad ("Parkinsad", "we", "us", "our"). These Terms of Service ("Terms") form a binding agreement between you and us governing your use of the App and this website.

You can reach us at hi@proofapp.site. Our postal address is available on request.

By downloading, installing or using the App, you accept these Terms. If you do not accept them, do not use the App. Our Privacy Policy forms part of these Terms.

Nothing in these Terms limits your statutory rights. If you are a consumer in the UK, you have rights under the Consumer Rights Act 2015 and the Consumer Contracts (Information, Cancellation and Additional Charges) Regulations 2013 that cannot be excluded, and those rights prevail over anything here that conflicts with them.

2. Eligibility

You may use the App's customer features if you are 13 or over. You may open a business account only if you are 18 or over and are authorised to act for the business you register. If you register on behalf of a company or other organisation, you confirm you have authority to bind it, and "you" then means both you and that organisation.

3. What the App does

For customers

Scan a participating business's QR code and enter its rotating verification word to record a visit
Keep a visit history on your device, with optional cloud backup you switch on yourself
Choose an alias so a business can recognise your repeat visits and award loyalty rewards
Export your visit data, and delete it at any time

For business owners

Create and manage business profiles and their QR codes
Operate the rotating verification word system, and grant staff access to it
View visit records and analytics for your own business only
Run customer loyalty programmes and reward tiers

Customer accounts are anonymous: no name, email address or phone number is required. Visits are recorded against a self-chosen alias and a hashed device identifier, as described in our Privacy Policy.

4. Licence

We grant you a limited, non-exclusive, non-transferable, revocable licence to install and use the App on Apple-branded devices you own or control, for the purposes these Terms allow and subject to the Apple Media Services Terms of Use.

You may not: copy, modify, translate or create derivative works of the App; reverse engineer, decompile or disassemble it, except to the extent that law expressly permits despite this restriction; rent, lease, lend, sell, sublicense or distribute it; remove any proprietary notices; or use it to build a competing product.

5. Acceptable use

You must not:

Falsify, forge, replay or automate visit records, or help anyone else do so
Obtain or share verification words other than as a genuine customer or authorised member of staff
Attempt to defeat the App's cryptographic verification, rate limiting or fraud controls
Access another business's data, or attempt to re-identify a customer behind an alias or hashed identifier
Probe, scan or overload our infrastructure, or use scrapers or bots against the App or this website
Use the App unlawfully, or to harass, defraud or mislead anyone

We may suspend or terminate access, remove content, and void affected visit records where we reasonably believe this clause has been breached.

6. Business owner obligations

If you operate a business account, you additionally agree that:

The business details you register are accurate, and the business is one you are entitled to represent
You will keep verification words confidential and restrict staff access appropriately
You will honour any loyalty rewards you advertise through the App. Rewards are a contract between you and your customers; we are not a party to them and bear no liability for them
You will not use visit data to identify, profile or contact customers beyond operating your loyalty programme

Data protection. In respect of the visit data you receive through the App, you act as an independent data controller. You are responsible for complying with the UK GDPR and the Data Protection Act 2018 in your own right, including having a lawful basis and your own privacy notice. You will indemnify us against claims, fines and costs arising from your failure to do so.

7. Subscriptions and payment

The App offers a free tier and an optional paid subscription, Proof Chain Pro, available as a monthly or an annual plan.

Prices. The subscription name, duration and price are shown in the App and on the App Store before you confirm any purchase. Prices vary by country and include VAT or local taxes where applicable. We do not publish prices on this page, so that what you see at the point of purchase is always the price that applies.
Payment. All payments are taken by Apple and charged to your Apple Account on confirmation of purchase. We never receive or store your payment details.
Auto-renewal. Subscriptions renew automatically for the same period unless you turn off auto-renew at least 24 hours before the current period ends. Your Apple Account is charged within 24 hours before the start of each renewal period.
Cancellation. You can turn off auto-renew at any time in Settings › your Apple Account › Subscriptions. Cancelling stops future charges; you keep Pro features until the end of the period you have paid for. Deleting the App does not cancel a subscription.
Free trials. If a free trial is offered, any unused portion is forfeited when you buy a subscription. Unless cancelled before it ends, a trial converts automatically into a paid subscription.
Price changes. We may change subscription prices. Apple will notify you in advance and, where required, ask you to consent before any increased price is charged. If you do not agree, you can cancel before the change takes effect.
Feature changes. We may add, alter or withdraw individual Pro features. If we make a change that substantially reduces the value of a paid subscription, you may cancel and ask us for a proportionate refund of the unused period.

8. Your right to cancel, and refunds

If you are a consumer in the UK or EU, you normally have 14 days to cancel a distance contract for digital content. By starting a subscription and gaining immediate access to Pro features, you request that supply begin at once and acknowledge that you lose that 14-day cancellation right once supply has begun, as the Consumer Contracts Regulations 2013 permit.

This does not affect your rights if the service is faulty, not as described, or not supplied with reasonable care and skill. In those cases you have remedies under the Consumer Rights Act 2015, and you should contact us at hi@proofapp.site.

Because Apple is the merchant of record, refunds are requested from Apple through reportaproblem.apple.com and are granted under Apple's policies. We cannot process refunds directly, but if Apple declines a request you believe is justified under your statutory rights, contact us and we will look into it.

9. What visit verification does and does not prove

The App records a visit when a valid QR code is scanned and the correct rotating verification word is entered, and signs that record cryptographically so later tampering is detectable. Verification is checked on our servers to resist forged and replayed check-ins.

You should nevertheless understand its limits. A visit record evidences that a device presented valid credentials at a given time. It does not prove the identity of the person holding that device, and it can be defeated by a customer who shares a verification word, or by a business that discloses one. Visit records are not legal or evidential proof of physical presence, and must not be relied on as such — including in legal, regulatory, insurance, employment or immigration matters. We give no warranty that any record will be accepted by any third party.

10. Availability

We aim to keep the App available, but we do not guarantee uninterrupted or error-free operation. The App depends on your device, your network, and third-party services including Apple and our hosting provider. We may suspend the service for maintenance, security or upgrades, and we will give notice where it is reasonable to do so.

Some features need an internet connection. Visit verification does; browsing your local history does not.

11. Intellectual property

We own, or are licensed to use, all rights in the App and this website — including the source code, the verification and signature design, the interface, the Proof Chain and Parkinsad names, and the associated logos and marks. These Terms grant you no rights in them beyond the licence in clause 4.

You keep all rights in your own business information, your logo and the content you supply. You grant us a non-exclusive, royalty-free licence to host, reproduce and display that content only so far as is necessary to operate the App for you.

12. Third-party services

The App relies on services operated by others, including Apple, Supabase and RevenueCat. Your use of the App through the App Store is also governed by Apple's terms. We are not responsible for those services' acts or omissions, but we will use reasonable care in selecting them.

13. Disclaimers

Except as these Terms expressly state, and to the fullest extent the law allows, the App is provided "as is" and "as available", and we exclude all implied warranties, conditions and terms — including those of satisfactory quality, fitness for a particular purpose and non-infringement.

We do not warrant that the App will meet your requirements, that defects will be corrected, or that visit records will be free of error or fraud. If you are a consumer, nothing in this clause affects your statutory rights, which cannot be excluded.

14. Limitation of liability

Nothing in these Terms excludes or limits our liability for death or personal injury caused by our negligence, for fraud or fraudulent misrepresentation, or for anything else that cannot lawfully be excluded — including, for consumers, liability under the Consumer Rights Act 2015.

Subject to that:

We are not liable for loss of profit, revenue, business, goodwill, anticipated savings, or for any indirect or consequential loss
We are not liable for loss or corruption of data that you could have avoided by using the App's backup and export features
We are not liable for the acts or omissions of a business you visit, or of a customer who visits your business
Our total liability arising out of or in connection with these Terms is limited to the greater of the subscription fees you paid us in the 12 months before the claim arose, or £100

If you use the App as a business, you accept that this allocation of risk is reasonable given the price of the service, and you use the App at your own risk in your business operations.

15. Suspension and termination

You may stop using the App at any time by deleting it and, if you subscribe, cancelling through the App Store. You can delete your business account and its data from within the App.

We may suspend or terminate your access if you materially breach these Terms, if we reasonably suspect fraud or misuse, or if we are required to by law. Where it is reasonable and lawful to do so, we will warn you first and give you a chance to put things right. If we terminate without cause, we will refund the unused portion of any subscription you have paid for.

On termination your licence ends immediately. Clauses 11, 13, 14, 16 and 17 survive.

16. Changes to these Terms

We may update these Terms as the App develops or the law changes. We will revise the date at the top, and for changes that materially affect your rights or obligations we will give reasonable notice in the App before they take effect. If you do not accept a change, your remedy is to stop using the App and cancel any subscription. Continuing to use the App after a change takes effect means you accept it.

17. Governing law and disputes

These Terms and any dispute arising from them are governed by the law of England and Wales.

The courts of England and Wales have exclusive jurisdiction, except that if you are a consumer resident elsewhere in the United Kingdom you may also bring proceedings in your own courts, and you keep the benefit of any mandatory protections of the law where you live.

Please contact us first at hi@proofapp.site. We try to resolve complaints within 14 days.

18. Apple

These Terms are between you and us, not Apple, and Apple is not responsible for the App or its content. Apple has no obligation to provide support or maintenance for the App. If the App fails to conform to any applicable warranty, you may notify Apple and Apple will refund the purchase price; to the maximum extent the law allows, Apple has no other warranty obligation in respect of the App. We, not Apple, are responsible for addressing any claim that the App or your use of it infringes intellectual property rights, and for any product liability or legal compliance claim relating to the App.

You confirm that you are not located in a country subject to a US Government embargo or designated as a "terrorist supporting" country, and that you are not on any US Government list of prohibited or restricted parties.

Apple and its subsidiaries are third-party beneficiaries of these Terms and may enforce them against you.

19. General

Entire agreement. These Terms and the Privacy Policy are the whole agreement between us about the App, and replace any earlier understanding.
Severance. If a provision is found unenforceable, the rest continues in force.
No waiver. If we delay enforcing a right, we do not lose it.
Assignment. You may not transfer your rights under these Terms without our consent. We may transfer ours on notice, provided your rights are not adversely affected.
Third parties. Except for Apple under clause 18, no one other than you and us may enforce these Terms.
Force majeure. Neither of us is liable for failure caused by events beyond reasonable control.

20. Contact

Trader: Mirsadra Molaei, trading as Parkinsad
Email: hi@proofapp.site
Postal address: available on request
Website: proofapp.site