DayKeep — Terms of Use

Version 1.0 · Effective 2 October 2026

DayKeep is provided by Vladislav Lapets, a sole trader, of Flat 59, 322 Regents Park Road, London, N3 2FH, United Kingdom ("we", "us", "our"). You can contact us at daykeep@vilae.uk.

Please read these terms before you use DayKeep. They are a legal agreement between you and us. They are not an agreement with Apple.

Summary of the important points

This summary is here to help you. It is not a substitute for the full terms below, and the full terms are what apply.

• DayKeep gives you estimates, not answers. Every figure is a projection based on the information you enter and on assumptions we have made.
• DayKeep is not financial, tax, accounting or legal advice, and we are not regulated by the Financial Conduct Authority.
• DayKeep cannot and does not determine your IR35 status. Only your client, your own company, HMRC or a tribunal can do that.
• You remain responsible for your own tax affairs and for any decision you make.
• DayKeep does all its calculations on your device. We do not collect, receive or store the figures you enter.
• Nothing in these terms takes away the rights the law gives you as a consumer.

1. Accepting these terms

By downloading, installing or using DayKeep, you agree to these terms. If you do not agree to them, please do not use DayKeep and delete it from your device.

2. Your licence to use DayKeep

We grant you a personal, non-transferable, non-exclusive licence to use DayKeep on any Apple-branded device that you own or control, as permitted by the App Store Terms of Service. DayKeep is licensed to you, not sold.

You must not: copy, modify or create derivative works of DayKeep; reverse engineer, decompile or disassemble it, except to the extent the law expressly permits despite this restriction; rent, lease, lend, sell or sublicense it; or remove any proprietary notices.

We and our licensors own all intellectual property rights in DayKeep, including its calculation logic, design, text and branding. You get no rights in it other than the licence described above.

3. What DayKeep does

DayKeep estimates what you might take home from a contract engagement under different arrangements — for example inside or outside IR35, or through an umbrella company or your own limited company.

It does this by applying published tax rates, thresholds and rules to the figures you enter, together with a set of assumptions. Those assumptions are described in the app. They are necessarily simplifications.

4. What DayKeep does not do

4.1 DayKeep produces estimates only. Every output is an estimate. It is not a calculation of what you will actually receive, and it is not a statement of what you owe or will owe. Your actual position will depend on your full personal and business circumstances, which DayKeep does not know and does not ask for.

4.2 DayKeep is not advice. DayKeep does not give financial, tax, accounting, investment, pensions, employment or legal advice, and nothing in the app should be treated as a recommendation to take, or not take, any particular course of action. We are not your accountant, tax adviser or solicitor, and using DayKeep does not create any adviser–client relationship between us.

4.3 We are not FCA regulated. We are not authorised or regulated by the Financial Conduct Authority, and DayKeep does not provide any regulated financial advice or any regulated service. We are not authorised by HMRC as a tax agent and we do not act as your agent for any purpose.

4.4 DayKeep does not determine your IR35 status. Employment status for tax purposes is a question of law that depends on your written contract and on how you actually work in practice. Under the off-payroll working rules it is determined by your end client (where the client is medium or large), or by your own company (where the client qualifies as small), and ultimately by HMRC or by a tribunal. DayKeep has no role in that determination. Where DayKeep asks you whether an engagement is inside or outside IR35, it is asking you to tell it which scenario to model — it is not assessing, deciding, confirming or predicting your status, and its output is not a status determination, a substitute for a Status Determination Statement, or evidence of your status.

4.5 DayKeep does not check whether the figures you enter are right. It applies the rules to whatever you give it.

4.6 DayKeep does not file anything. It does not submit returns, make payments, or communicate with HMRC, Companies House, your client, your agency or your umbrella company.

5. Tax rates, rules and updates

Tax rates, thresholds, allowances and rules change — usually at the start of each tax year, and sometimes at a Budget or Fiscal Event, occasionally with retrospective effect. DayKeep shows the tax year and the rate set it is using. We take reasonable care to keep it current, but we do not promise that it reflects the most recent changes at any given moment, particularly in the period immediately after an announcement.

Always check which tax year and rate set a result was produced under before relying on it.

6. Your responsibilities

You are responsible for:

• your own tax compliance, including registering with HMRC where required, filing accurate and timely returns, and paying the right amount of tax and National Insurance on time;
• the accuracy and completeness of the information you enter into DayKeep;
• deciding whether a DayKeep estimate is suitable for your circumstances; and
• getting professional advice from a qualified accountant, tax adviser, IR35 specialist or solicitor before you make a decision that matters — including accepting or declining an engagement, agreeing a rate, choosing between an umbrella company and a limited company, or taking a position on your employment status.

DayKeep is a starting point for a conversation with a professional. It is not a replacement for one.

7. Accuracy

We build and maintain DayKeep with reasonable care and skill. We do not, however, promise that DayKeep will be free from errors, that it will be available without interruption, or that any particular estimate will match your actual outcome. Estimating tax outcomes involves assumptions, and different assumptions produce different figures.

8. Your data

DayKeep performs all of its calculations on your device.

The figures you enter stay on your device. We do not collect them, we do not receive them, we cannot see them, and we do not store them on any server. If you delete DayKeep, the information you entered is removed with it.

Our Privacy Policy explains this in full, including the limited technical information we may receive from Apple and what happens if you contact us for support.

9. Availability, changes and withdrawal

We may update DayKeep from time to time — to correct errors, reflect changes in tax rules, improve it, or keep it compatible with current versions of iOS. Some updates may be needed for DayKeep to keep working properly.

We may also stop supporting or making DayKeep available. If we do so, and you have paid for DayKeep or for a subscription, we will give you reasonable notice and refund any amount you have paid for a period you will no longer receive.

10. Our responsibility to you

10.1 We do not limit our liability where the law does not allow us to. Nothing in these terms excludes or limits our liability for: death or personal injury caused by our negligence; fraud or fraudulent misrepresentation; any breach of the rights the Consumer Rights Act 2015 gives you in respect of digital content; or anything else which the law does not allow us to exclude or limit.

10.2 We are responsible for foreseeable loss and damage we cause. If we fail to use reasonable care and skill, we are responsible for loss or damage you suffer that is a foreseeable result of that failure. Loss or damage is foreseeable if it was obvious that it would happen, or if both you and we knew it might happen at the time you accepted these terms.

10.3 Reliance on estimates. DayKeep tells you clearly, and repeatedly, that its outputs are estimates that depend on the information you enter and on stated assumptions. We are not responsible for loss you suffer because you treated an estimate as a definitive figure, or made a decision based on an estimate without checking it against your own circumstances or taking professional advice, where a reasonable person in your position would have done so. This does not affect our responsibility under clause 10.2 where the loss was caused by our own failure to use reasonable care and skill.

10.4 Damage to your device. If DayKeep damages your device or other digital content you own, and the damage was caused by our failure to use reasonable care and skill, we will either repair the damage or pay you appropriate compensation, as the Consumer Rights Act 2015 requires. We are not responsible for damage that you could have avoided by following our advice to apply an update, or that was caused by your failure to follow installation instructions or by inadequate free storage or an unsupported device.

10.5 If you are using DayKeep for business purposes. If you use DayKeep wholly or mainly for the purposes of your trade, business, craft or profession, then the consumer protections referred to above do not apply to you, and instead: we are not liable to you for loss of profit, loss of business, loss of contracts, loss of anticipated savings, business interruption, or loss of business opportunity, whether direct or indirect; and our total liability to you in connection with DayKeep, whether in contract, tort (including negligence), breach of statutory duty or otherwise, is limited to the greater of (a) £250 and (b) the total amount you have paid us for DayKeep in the twelve months before the claim arose. Clause 10.1 still applies.

11. Your statutory rights

You have legal rights as a consumer that these terms cannot take away. In particular, if you have paid for DayKeep, it must be of satisfactory quality, fit for purpose, and match the description we gave it; if it is not, you may be entitled to a repair, a replacement, or a reduction in price. Nothing in these terms affects those rights.

For more information about your rights, contact your local Citizens Advice or Trading Standards office.

12. Apple

You and we acknowledge that:

• these terms are between you and us, and not with Apple, and we (not Apple) are solely responsible for DayKeep and its content;
• Apple has no obligation to provide any maintenance or support for DayKeep;
• if DayKeep fails to conform to any applicable warranty, you may notify Apple, and Apple may refund the purchase price (if any); to the maximum extent permitted by law, Apple has no other warranty obligation in respect of DayKeep;
• we, not Apple, are responsible for addressing any claim by you or a third party relating to DayKeep or your possession or use of it, including product liability claims, any claim that DayKeep fails to conform to any legal or regulatory requirement, and claims arising under consumer protection, privacy or similar legislation;
• we, not Apple, are responsible for investigating, defending, settling and discharging any third-party claim that DayKeep infringes that third party's intellectual property rights;
• you represent 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; and
• Apple and its subsidiaries are third-party beneficiaries of these terms and, on your acceptance, Apple has the right (and is deemed to have accepted the right) to enforce these terms against you.

If you have any questions, complaints or claims about DayKeep, contact us at daykeep@vilae.uk.

13. Changes to these terms

We may change these terms — for example to reflect a change in the law, a change in how DayKeep works, or a new feature.

If we make a change that affects your rights or obligations in a way that matters, we will tell you in the app before the change takes effect and give you at least 30 days' notice, unless the change is required by law or is needed urgently to address a security or legal issue, in which case we will give you as much notice as we reasonably can. We will always show the version number and effective date at the top of these terms and keep the previous version available on request.

If you do not want to accept a change, you can stop using DayKeep and delete it. If you have paid for a subscription, you may cancel it and we will refund any amount covering a period after the change takes effect.

14. Ending this agreement

You can end this agreement at any time by deleting DayKeep from your devices.

We may end this agreement, or suspend your access, if you materially breach these terms — for example by attempting to reverse engineer DayKeep or by using it unlawfully. We will give you notice and, where the breach can be put right, a reasonable opportunity to put it right, unless the breach is serious enough that we cannot reasonably be expected to do so.

15. Other terms

If a court finds any part of these terms unlawful or unenforceable, the rest of the terms continue to apply.

If we do not insist that you do something you are required to do under these terms, or if we delay in taking steps against you in respect of a breach, that does not mean we have given up our rights.

We may transfer our rights and obligations under these terms to another organisation. We will tell you in writing if this happens and will make sure the transfer does not affect your rights. You may not transfer your rights or obligations to anyone else without our written consent.

16. Governing law and where you can bring proceedings

These terms are governed by the law of England and Wales.

If you are a consumer, you benefit from any mandatory provisions of the law of the country in which you live, and nothing in these terms affects your right to rely on those provisions. If you live in the UK, you can bring proceedings in the courts of England and Wales, and if you live in Scotland or Northern Ireland you may also bring proceedings in the courts of your own country.

If you are using DayKeep for business purposes, the courts of England and Wales have exclusive jurisdiction.

17. Complaints

If something has gone wrong, please contact us at daykeep@vilae.uk and tell us what has happened. We will acknowledge your message and try to resolve it.

These terms were last updated on 2 October 2026.