Privacy Policy

Your writing. Your books live in your own Documents folder. Proselon does not upload them, back them up to us, index them, or train anything on them. There is no cloud manuscript storage. If you delete Proselon, your books are still sitting there in plain files.

The app tells us when it is opened, how long a session lasts, which writing engine you picked and whether its setup finished, which theme you chose, and which export format you ran. Nothing about your books: not their names, not their files, not how many you have, not even that you opened one. Each count is a named event with a timestamp and, at most, a short identifier — our server rejects anything else, so this channel cannot carry prose, chat, titles or paths even by accident. We use it to answer questions such as how many writers are on Windows, which engines get used in practice, and whether people come back. Nothing here is sold, shared, or used for advertising. It is on by default and disclosed here. If you would rather not send it, turn it off in Settings → Privacy in the app. The switch takes effect immediately, our server rejects events from your account while it is off, and turning it off records when you did, so we can prove we stopped.

Only the services that make Proselon run, and only what each one needs:

• Stripe, for payments and subscription management. It receives your email and payment details directly.
• Supabase, for account storage and authentication.
• Resend, for sending the account and billing emails described in the Terms.
• Google Analytics, for website usage measurement.
• Vercel, for hosting this website and the account service.

We do not sell your personal information, and we do not share it with advertisers.

Proselon’s co-writer runs on an AI account you sign into yourself, or on a model running locally on your machine. When you use it, what you send goes to that provider under their privacy policy rather than through us. We never receive it. If you use a local model, nothing leaves your computer at all.

Account and subscription records last as long as your account does. Sign-in records (IP and user agent) are kept while they are useful for abuse investigation. Raw usage events are kept for 13 months, then reduced to anonymous monthly totals and deleted. A device you sign out stays in the registry, marked signed out, for up to 12 months and is then removed. Stripe keeps its own payment records for as long as tax and financial rules require, independently of us.

You can delete your account from Settings inside the app. Doing so cancels any subscription immediately, deletes your Stripe customer record, deletes your rows in our database, sign-in records and device list and usage events and consent records included, and deletes the sign-in itself. It does not touch your books. Those are yours, on your machine. If you would rather we did it, email hello@proselon.com.

Depending on where you live, you may have the right to see the personal data we hold about you, correct it, have it deleted, or object to how it is used. Email hello@proselon.com and we will act on it. If you are in the UK or EU, you also have the right to complain to your local data protection authority.

Proselon is not intended for children under 13, and we do not knowingly collect their information.

If we change what we collect or who we share it with, we will update this page and change the date at the top. Material changes are emailed to the address on your account.

Questions, requests, or complaints: hello@proselon.com.