Terms of sale and use

A personal, perpetual, non-exclusive licence to use Sluka. One payment of $15 in US dollars. No subscription, no account, no recurring charge, and no tiers above it — there is one thing to buy and this is it.

The licence covers every feature, every language and every device you own: the browser extension and the phone app, all twenty-four languages and every bundled dictionary, books, video captions, chat, sync and statistics. Buy once, paste the key wherever you read.

Perpetual means it does not expire and cannot be switched off remotely. The check that decides whether this device is licensed is arithmetic against a public key inside the app: no network, no server, no clock. If everything of ours disappears, your copy carries on.

Updates are not promised, and are not needed for the licence to keep working. Versions released while Sluka is one product at one price are covered by the key you already have. If a separate paid product ever exists, it will be sold separately and this licence will not stop working because of it.

Sluka is usable without paying. Nothing is time-limited and no feature is switched off. The free version stops letting you save new words once you are tracking 1,000 of them in that language. The allowance is per language, so a second language starts from nothing rather than from whatever the first one used up.

That is the only thing the free allowance does. Everything already saved keeps working; so do reading, highlighting, look-ups, the AI check, books, video, sync, statistics, export and every language. You can still change what you know about a word you already have, mark one Ignored, or set one back to New at any size. The count is the number shown on the Words tab, and the second spelling of a word you already have does not count twice.

Paying lifts the cap. It does not add features, because there are no features held back.

Sluka is made and sold by its developer, a sole trader in Mölndal, Sweden. The contract for the licence is with the developer, and support and refunds come from the same place: [email protected].

The trader is Oskar Öster, Örngatan 1A, 431 38 Mölndal, Sweden.

Polar Software, Inc. is the reseller and merchant of record. Polar takes the payment, handles the card, calculates and remits VAT, and issues the receipt. The charge on your statement is theirs, and so is the tax paperwork. Refunds are issued through Polar, to the card you paid with.

No app store is the seller. Not Google, not Apple, not the Chrome Web Store. Where Sluka is distributed through a store, the store distributes the software; it does not sell the licence, is not party to these terms, and has no obligation to you under them.

If Sluka has a technical fault and you can show it to me at [email protected], you get a full refund. That is the whole condition.

Showing it to me means enough to see the fault: the page or book you were reading, what you expected, what happened instead. A screenshot or a short screen recording is usually plenty. Include your licence key.

I would much rather fix the problem than take the refund, so expect a fix to try as well. The refund does not wait on it. Refunds are issued through Polar to the card you paid with.

Changed your mind? If you bought as a consumer in the EU or the EEA, you can withdraw from the purchase within 14 days of the day you bought it and get a full refund, with no reason needed. Write to [email protected] from the address you bought with, or include your licence key, and say you are withdrawing. The refund goes through Polar to the card you paid with, within 14 days of your message, and the licence stops being yours to use.

Nothing in this section limits the rights you have as a consumer under Swedish or EU law. Where those rights give you more than this policy does, they win.

A licence is a line of text you paste once. It carries your name and email address and is signed with a private key that exists on one laptop. The app checks the signature against a public key baked into it, which is why the check needs no network and no account.

The trade in that design is stated rather than hidden. A signed bearer token is unforgeable, not unshareable. Nobody can manufacture one of these. Anyone can pass one on. The name inside is the whole of the enforcement, and it is there so that passing the key on is something a person decides to do rather than something that costs them nothing.

So, plainly: the licence is for one person. Use it on as many devices as you own. Do not give it to other people, post it, sell it, or ship it inside anything. Nothing technical stops you. It is still not permitted. Every licence carries a serial, so a key that turns up in public can be traced back to the sale it came from.

A lost key can always be reissued. It is derived from your purchase rather than stored in a database that has to survive, so having it emailed again works whenever you need it.

A feature that shipped free stays free. Nothing that works without a licence today will be moved behind the licence in a later version. If the free allowance changes, it changes upwards. It is never reduced, and never for a copy already installed.

This is a commitment for the life of the product, not a policy that gets revisited when revenue is flat. New paid things may be built. The free ones stay where they are.

Sluka reads, highlights, looks up and counts on your own machine. Your words, books, statistics and settings stay in your own browser and there is no server holding them. Some features use someone else's service, and the privacy page lists every one of them, with what each sends and how to switch it off.

The detail is on the privacy page. What is stored, what leaves the machine and what never does is set out in full at Privacy rather than repeated here.

The extension ships unpacked and readable. That is deliberate, and pretending otherwise would be silly. Read it, take it apart, change your own copy, run it against your own build of the data. None of that is prohibited here.

What the licence does not grant is the right to redistribute Sluka or anything derived from it, to sell it, or to ship it as part of another product. Third-party data and code inside Sluka — dictionaries, word lists and libraries — carry their own licences, which travel with them and are not overridden by this page. A dictionary file adapted from a share-alike source, such as Wiktionary, CC-CEDICT or JMdict, is yours to share under that source's licence. Every source and its licence is listed in THIRD-PARTY-NOTICES.md inside the extension and the app, and per language in Settings → Languages → Dictionary.

Sluka is supplied as it is. It is not promised to be free of bugs, to work on every site, to hold a particular reading speed, or to keep working when a browser, a website or a phone changes underneath it. It is a reading tool, not a backup service: your data lives in your browser, and keeping a copy of the export is your job.

Where liability can be limited, it is limited to what you paid — $15. Loss of data, loss of study time and indirect losses are not covered.

Two things this does not touch. Liability for death, personal injury, fraud or anything else that cannot be excluded by law is not excluded. And your rights as a consumer under Swedish and EU law — the consumer sales rules, the right to a remedy for a faulty digital product, the right of withdrawal — stand in full. Nothing on this page reduces them, and where this page conflicts with them, they win.

These terms may change for future purchases. The version that applies to your licence is the one published on the day you bought it, and the date at the top of this page says which that is. A change here can never take away a feature you already have; see what will not move behind the licence.

Swedish law applies. If you are a consumer, that does not deprive you of the protection of the mandatory rules of the country you live in, and you may take a dispute to Allmänna reklamationsnämnden (ARN) in Sweden.

Anything unclear, anything broken, anything you want back: [email protected]. It is one person, and it is answered.