Privacy Policy

Papermarkets is operated by Mo Systems LLC, who decides what is collected and why. Write to mosystemsllc@gmail.com about anything on this page.

Papermarkets is a mobile app. The website at papermarkets.io closes at the end of October 2026. Until then, it collects what is described under “The website, until it closes” below.

Signing in. Our authentication provider, Clerk, handles every sign-in: with Apple, with Google, or with an email address and a password. Clerk holds your email address, the password if you set one, and whatever name and picture Apple or Google give it. From Clerk we store your email address (to identify your account and to reach you if we need to), Clerk's id for you, and your profile picture until you pick an avatar. We do not store your name. We never see an Apple or Google password, and we ask neither for anything beyond your basic profile.

Your account. This covers:

• The username you choose.
• The avatar you pick. We generate avatars ourselves from a style and a random seed, and store those two.
• Any X, Instagram or Discord handle you add in Settings.
• The market categories you said you like.
• Whether you have finished onboarding.
• When the account was created and last changed.
• Your invite code, and, if you joined through someone's invite link, who invited you and when.

How you play. This covers:

• Which tournaments and leagues you joined, hosted or own.
• Every simulated trade you place: market, outcome, direction, size, price and time.
• Your open and closed positions, and how each settled.
• Your bankroll in each tournament, your rank, and any prize you won.
• A snapshot of your value in each tournament, taken once a minute and thinned to one every fifteen minutes after a day, so leaderboards and charts have a history.
• A ledger of every Coin you received or spent, and why: sign-up and invite rewards, entry fees, prizes, host fees.
• For a tournament you host, its name, settings and the cover you picked. For a GIF cover, that is only KLIPY's id for the GIF.

Notifications. If you allow notifications, we store the push token Apple or Google gives your phone, with the platform and when it was last seen, so we can send to it. We also keep each notification we send you:

• A tournament is starting, was cancelled, or ended, and how you finished.
• A market you hold settled, or a position is up.
• Someone joined a tournament you host.

You can turn notifications off at any time in your phone's settings. Signing out removes your phone's push token.

The waiting list. Papermarkets ran a waiting-list form while it was in closed beta. That form is gone, but we still hold what was given: an email address, and a name and a note where they were supplied. Ask us and we will delete yours.

Server logs. Our API and the web server in front of it write an ordinary request log: IP address, what was requested, the response and how long it took, and sometimes your account id. It is capped and rotated away automatically, and is never loaded into the database or used to build a profile of you. We read it when something is broken.

We do not collect your location, your contacts, your photos or your phone's advertising identifier, and we never ask for your date of birth. The app reads your clipboard only when you choose to paste a league code.

The app uses PostHog to understand how Papermarkets is used: which screens people open, where they give up, what breaks, and whether a feature is worth keeping. It records:

• The screens you open, when the app opens and closes, and named actions such as signing in, finishing onboarding, and joining or hosting a tournament.
• Errors and crashes, with your device model and operating-system version, so we can fix them.
• Screen recordings of some sessions, so we can see where the app confuses people. All text, everything you type, and images are masked before anything leaves your phone: a recording shows layout, navigation and taps, not your words or numbers.
• Roughly where in the world you are, derived from your IP address.
• Once you sign in, your account id, email and name, so we can tell one person's experience of a bug from everyone else's.

We use this only to run and improve Papermarkets. It is not used for advertising, and it is not combined with data from other companies' apps. Deleting your account stops anything further being linked to you. Events already sent to PostHog stay in their system under the id you had at the time; ask us and we will have them deleted there too.

Tournament covers are GIFs from KLIPY. To show you GIFs, your phone contacts KLIPY directly, not through our servers. KLIPY therefore sees:

• Your IP address, and your phone's type and operating-system version.
• What you type into the GIF search, and which GIFs you look at.
• A stable code derived from your account id, so KLIPY can tell repeat visits apart. It is not your email or username.

The same applies when your phone loads the covers of tournaments you are looking at. KLIPY handles this under its own privacy policy. We have switched off KLIPY's advertising, so no ads are shown in the GIF picker.

The only automatic email is the one Clerk sends when you need it: a code to confirm a new email sign-up, to sign in on a new device, or to reset a password. There is no newsletter and no marketing email. Anything else you get from us was written by a person.

Papermarkets is a competitive game, so parts of your account are meant to be seen.

Anyone, even without an account, can see:

• Your username and avatar.
• The leaderboard of any tournament or league season you play in: your rank, cash, the value of your positions and your total.
• A tournament's list of players and its final results.
• Your public profile: your tournament record (played, wins, podium finishes) and where you finished in past tournaments.
• If you invited someone, the invite page for your link shows your username.

Players in the same tournament or league can also open your book in it: your positions and your trades there.

A small number of our own staff accounts can view any tournament or league, for support and moderation.

Never public:

• Your email address.
• Your Coin balance and Coin history.
• Your social handles, which only you see.
• Your notifications and push token.
• Anything on the beta waiting list.

Pick a username you are comfortable being seen under. It is how you appear everywhere.

• Your sign-in session, in your phone's secure storage, so you stay signed in.
• Your onboarding progress (the step you reached, the username and avatar you chose, and an invite code if you arrived through one), also in secure storage, so an interrupted sign-up can resume.
• PostHog's anonymous id, and events waiting to be sent.
• GIF search results and covers, held in memory for up to thirty minutes so the app does not ask KLIPY twice. They are never saved to storage.

Deleting the app removes all of it.

Until papermarkets.io closes at the end of October 2026:

• It uses PostHog in your browser, including recordings of visits with what you type masked.
• It is served by Vercel, which sees the requests your browser makes.
• When we advertise on Reddit, it loads Reddit's conversion pixel to tell whether an ad led to a sign-up. Reddit receives that through its own cookie and under its own policy.
• Clerk sets the cookies that keep you signed in, and PostHog sets one to recognise the same browser across visits.

After the website closes, only pages like this one remain, and none of the above runs there.

Everything we store sits in one PostgreSQL database on a server rented from DigitalOcean, in their NYC3 (New York, United States) region. The database is not reachable from the internet. Traffic between your phone and our servers is encrypted with TLS.

We take occasional backups of the database before major changes. They are kept on the same server, or on the operator's own computer, and are deleted as they age.

Papermarkets is used around the world and run from the United States. If you are outside the US (in the EU or the UK, say), your data is transferred to and stored in the US, as are the services listed below, in order to give you the service you asked for.

We keep this list short on purpose. These are every third party involved in running Papermarkets:

• Clerk: authentication. Runs the sign-in flow, holds your email, password and session, and sends sign-in codes.
• Apple and Google: distribute the app. If you sign in with them, they know you signed in to Papermarkets. Their push services (Apple Push Notification service and Firebase Cloud Messaging) deliver notifications to your phone.
• Expo: the platform the app is built and updated with. Our server hands each notification to Expo's push service, which passes it to Apple or Google.
• PostHog: analytics, crash reports and masked screen recordings.
• KLIPY: the GIF library for tournament covers, contacted directly by your phone.
• DigitalOcean: the server and the database run on their infrastructure.

Polymarket supplies markets, prices and resolutions, and receives nothing about you from us. Market pictures load from Polymarket's image host, so it sees that your phone asked for a picture.

We may also disclose data if the law requires it, or where it is necessary to investigate abuse or protect the service and its players. If this list changes, this page changes with it.

Your account, its game history, its Coin ledger and the notifications we sent you are kept while your account exists. Results from finished tournaments stay, because a tournament's record is what its leaderboard was. Value snapshots are thinned after a day. Waiting-list entries are kept until you ask us to delete them. Server logs rotate away on their own. Analytics events and recordings are kept by PostHog under our account for as long as they are useful to us, and are deleted on request.

You can delete your account yourself, at any time, in the app under Settings → Delete account. It takes effect immediately and cannot be undone. If you would rather we did it, or no longer have the app, email mosystemsllc@gmail.com from the address on your account.

Deleting your account erases everything that identifies you:

• Your email address, username, avatar and social handles.
• Your invite code and your public profile.
• Your push tokens, notifications, notification settings and category preferences.
• Your Clerk sign-in, and with it your ability to log back in.

Your trades, positions, results and Coin ledger stay, under an anonymous handle that names nobody. This is deliberate: a tournament's results belong to everyone who played it, and one player leaving cannot rewrite the leaderboard the others played on. None of what remains is linked to you, to your email, or to your Apple or Google account.

Deleting your Papermarkets account does not touch your Apple or Google account. If you are on the waiting list as well, say so and we will remove that entry too.

You can ask us for a copy of what we hold about you, or ask us to correct it. You can change your username, avatar and social handles yourself at any time, and delete your account yourself.

Depending on where you live, you may also have the right to object to or restrict how we use your data, to withdraw consent, to receive your data in a portable form, and to complain to your local data protection authority. The EU, the UK, Brazil, California and many other places have their own rules. We honour these requests wherever you are, rather than checking first whether we have to, and answer within a month.

We rely on these legal bases where one is needed:

• To perform the service you asked for: your account, your gameplay data and notifications.
• Our legitimate interest in running a working, non-abusive service: server logs, crash reports, the waiting list and invite credit.
• Your consent, where your local law requires it: analytics and screen recordings.

Papermarkets is for people aged 13 and over. We do not knowingly collect anything from anyone under 13, and if we learn that we have, we delete the account. If you believe a child under 13 has an account, write to us and we will delete it.

If you are over 13 but under the age at which you can agree to this on your own where you live, a parent or guardian needs to agree for you.

When what we collect changes, this page changes, and the “last updated” date at the top moves. For a change that materially affects you, such as a new service or a new category of data, we will say so in the app rather than quietly editing the page.

Questions, requests, or something on this page that does not match what you see in the app: mosystemsllc@gmail.com. The Terms of Service cover the rest of your relationship with Papermarkets.