Terms and refunds

Last updated 29 October 2026

Who sells Lampka

Lampka is made by Lukasz Buczynski, a sole trader in the United Kingdom ("I", "me"). You can reach me at support@lampka.app; every message is read. Lampka Pro owners get a personal reply, usually within a day or two; with the free version I can't promise a one-to-one reply to every message.

Purchases are handled by Stripe, through its Managed Payments service, who acts as the reseller and "merchant of record". They take the payment, charge VAT or sales tax where it applies, and send your receipt. Your receipt shows the seller as Onelink (Link, LLC). Their checkout terms apply to the payment itself.

Using Lampka

You may install the free version of Lampka on as many computers as you like and use it for personal or work reading. Please don't sell copies of it, or pass off a modified copy as Lampka.

Lampka includes open-source components (such as PDFium and Qt). Their licences are listed in the app under Help > About Lampka, and nothing in these terms limits your rights under them.

Beta versions

During the public beta, every feature is free. Each beta build works fully for 90 days from the day it was made; a newer beta build gives you another 90 days. Beta builds are early versions: they may have bugs, so keep your own copies of anything important. When a beta ends, nothing you made is deleted.

Lampka Pro

• What you get. A licence key that unlocks the Pro features in every 1.x version of Lampka. The features included are listed on the pricing section of this website at the time you buy.
• Who can use it. One licence is for one person, on all the computers that person uses. Please don't share or publish your key.
• Delivery. Your key arrives by email, usually within 24 hours while Lampka is new (keys are sent by hand). If it hasn't arrived, check your spam folder, then write to me.
• Future versions. Each new major version (2.0, 3.0 and so on) is a paid upgrade. If you have a licence for an earlier version, the upgrade is half price. Your key keeps working with its own version for good.
• Support. Everyone can send feedback and bug reports, and all of them are read. Personal support by email is part of Lampka Pro.
• Trial. Every new install includes 14 days of Pro to try. After that, Lampka stays free for reading, and your highlights and notes stay visible.

Refunds

If Lampka Pro isn't right for you, email support@lampka.app within 30 days of buying (just reply to your receipt or your key email), and you'll get a full refund. You don't need to give a reason. Once refunded, please stop using the licence key.

This is in addition to your legal rights. In the UK and EU, digital content normally comes with a 14-day right to cancel, which ends once you start downloading or using it with your agreement. The 30-day refund above is longer than that, and nothing here takes away any rights you have under consumer law.

If you bought Lampka Pro and it doesn't work as described, tell me: I'll fix it, or refund you if I can't, whenever you bought it.

Discount: students and disability support

Lampka Pro costs 40% less for students and for people who use a disability support service. To ask, email support@lampka.app with one of these:

• Students: write from your university or college email address, or attach a photo of your student card or an enrolment letter showing the current year.
• Disability support: attach a letter or email from your institution's or employer's disability, accessibility or learning-support service, confirming that you are registered for support. It does not need to say why, and please don't send medical details.

I'll reply with a personal, single-use code for the discount, usually within one or two working days. Codes can't be shared or resold. The proof is used only to check eligibility and then deleted. If you can't send it, write and tell me, and I'll find a way that works. The discount applies to Lampka Pro for the version you buy, and the 30-day refund applies as usual.

Founder's licence

While Lampka is in beta, Lampka Pro is also sold as a founder's licence at a lower price. It is a full Lampka Pro licence on the same terms as above (every 1.x version, 30-day refund), with three extras for backing Lampka early:

• a Founder badge in Lampka (in Help > About);
• if you agree, your first name and the first letter of your last name on the website's founders list. I'll ask you first, and you can ask me to take it down at any time;
• an extra 10% off your upgrade to Lampka 2.0, on top of the half price other licence holders get.

The founder's offer ends when Lampka 1.0 goes on sale. If you're refunded, the extras end with the licence.

Your documents

Lampka only reads your PDFs; it never changes them. Your library, highlights, notes and settings are stored on your computer (and, if you turn on sync, in a cloud folder you choose; your PDFs themselves are never copied there). Please keep backups of anything important: File > Export settings saves everything Lampka keeps in one file.

If something goes wrong

I build Lampka carefully and test it, but I can't promise it will be free of faults or suit every document. If you're a consumer, you have legal rights in relation to digital content that is faulty or not as described, and these terms don't affect them.

Otherwise, as far as the law allows, my total responsibility to you for anything to do with Lampka is limited to the amount you paid for it. I'm not responsible for losses that weren't foreseeable, or for business losses. Nothing in these terms limits liability that the law doesn't allow to be limited, such as for death or personal injury caused by negligence, or for fraud.

Changes and law

I may update these terms, for example when new features arrive; the date at the top shows the latest version. Changes won't take away anything you've already paid for. These terms are governed by the law of England and Wales. If you live elsewhere in the UK, you can also bring a claim in your local courts.

Questions

Write to support@lampka.app. The way Lampka handles your information is explained in the privacy policy.