Terms of Service

Papermarkets is a mobile game built on prediction markets. You enter tournaments, buy and sell positions on real-world events at live prices with a starting bankroll of virtual money, and finish ranked against the other players.

There are two ways to play:

• Tournaments are run by us on a fixed schedule. Before a tournament opens we announce its entry fee in Coins (many are free), the most players it takes, and its prize pool and how that pool is split by finishing place. The prize pool does not change with the number of players. If fewer players finish than there are prize places, the unfilled places are not paid. A tournament that does not reach its minimum number of players is called off and every entry fee is returned. Players cannot create tournaments.
• Leagues are private groups that play recurring seasons together. You join one with its code.

Papermarkets is mobile-only. The website at papermarkets.io is closing at the end of October 2026; after that it keeps only pages like this one.

You get Coins when you join, when someone you invited plays their first tournament, and by finishing in a prize place. You spend them on tournament entry fees.

Papermarkets is free. We do not charge for the app, accounts, tournaments or trades, and we sell nothing inside it.

Nothing in Papermarkets (prices, charts, leaderboards, other players' positions, or anything we write) is investment, legal or tax advice, or a recommendation to trade anything anywhere. We are not a broker, an exchange or a financial institution, and we are not regulated as one.

Doing well here does not mean you would do well with real money, and it is not a prediction that any event will happen. If you go on to trade real prediction markets or anything else, that is entirely your own decision and your own risk.

You must be at least 13 years old. If you are under the age of majority where you live, or under the age at which you can agree to online services on your own there, you may only use Papermarkets with a parent or guardian's permission, and they accept these terms on your behalf.

Papermarkets is open to players in every country except two groups: anyone barred by law from using a US service, including people in a country or on a list subject to US sanctions, and anyone in a place where a simulated trading game is not allowed. You are responsible for making sure using Papermarkets is legal where you are. If it is not, do not use it. We can still decline or withdraw access; see below.

You sign in through our authentication provider, Clerk, with Apple, with Google, or with an email address and a password. We never see or store your Apple or Google password, and a password you set here is held by Clerk, not by us. Keeping whatever you sign in with secure is your responsibility, because anyone who can use it can sign in as you.

When you first join, you choose a username and an avatar. Your username has to be unique and it is how you appear everywhere in the app. Do not pick one that impersonates somebody else, implies you are affiliated with Papermarkets or another organisation, is hateful or obscene, or is chosen to harass someone. We can change or reclaim a username that breaks these rules.

One person, one account. See Fair play for why that matters.

Papermarkets is a competitive game. Your username, avatar and results appear on tournament and league leaderboards, and anyone with a tournament's link can read its leaderboard. Players in the same tournament or league can look at each other's positions and trades in it.

Your email address is never shown. The full picture of what is public and what is not is in our Privacy Policy.

Things you create that other people see are yours: your username, league names, and the cover you pick for a league. You give us permission to display them in Papermarkets. We can remove or change any of them that break these terms.

League covers are GIFs from KLIPY, a third-party GIF library you search inside the app. The GIFs belong to their owners and KLIPY delivers them; we only store which one you chose. Do not pick a cover that is hateful, sexual, violent or aimed at another player. KLIPY may remove a GIF at any time, in which case the league falls back to its standard picture.

If you send us feedback or report a bug, we can use it to improve Papermarkets without owing you anything.

A leaderboard is only worth playing on if the ranking means something. So, while using Papermarkets, do not:

• Create more than one account, or use someone else's, to collect sign-up or referral Coins, fill a tournament, win more prize places, or improve your standing in any other way.
• Trade with scripts, bots or any other automated tool. Trades should be placed by a person, in the app.
• Scrape the service, hammer our API, or otherwise put load on it beyond ordinary use.
• Exploit a bug, a mispriced market, a settlement error or any other defect to gain a position, Coins or a rank you could not otherwise have. If you find one, tell us. We would much rather hear from you.
• Harass, threaten or abuse other players, or use a username, tournament or league name, or cover to do it.
• Attempt to break, probe or gain unauthorised access to the service, other players' accounts, or the systems behind either.

The markets, prices and resolutions you see come from a third-party prediction market provider, currently Polymarket, read through a data service we host ourselves. We are not affiliated with, endorsed by, or acting for any provider, and their names are theirs.

We pass that data through as we receive it, and it can be late, incomplete, or simply wrong. Prices can lag the real market. A market can be resolved by the provider in a way you disagree with. A market can disappear from our catalog, or stop being tradable here, without notice. Your simulated orders fill at the last price we hold, which may not be the price anywhere else at that moment; if that price is too old, we reject the order rather than fill it at a stale number.

We do not guarantee the accuracy, completeness, timeliness or availability of any market data, and we are not responsible for what a provider does.

Papermarkets is a game under active development, and keeping it fair and working sometimes means intervening. We may:

• Create, change, cancel or end tournaments, and change their schedules, themes, prizes and rules.
• Correct, reverse or void trades, positions, results, prizes and Coin balances that resulted from a bug, a bad price, a provider error or a breach of these terms.
• Change starting bankrolls, sign-up and referral rewards, market coverage and how ranking and prizes work.
• Suspend or delete an account that breaks these terms, remove anything it created, and take back Coins it gained unfairly.
• Change, suspend or discontinue any part of the service, or all of it, at any time.

A league's owner runs their league within the tools we give them, including removing and readmitting members.

Because Coins are not money, none of this costs you anything. But you should know it can happen, and that Coins, positions, ranks and history are not guaranteed to survive. Do not treat Papermarkets as the only record of anything you care about.

You get Papermarkets from the Apple App Store or Google Play, and your use of the app also has to follow that store's own rules.

If you got the app from the Apple App Store, these terms are between you and Mo Systems LLC, not Apple. Apple has no responsibility for the app, its content, its maintenance or support, or any claim about it, and is not a warrantor of it. Apple and its subsidiaries are third-party beneficiaries of these terms and may enforce them against you.

You can stop using Papermarkets whenever you like, and delete your account yourself in the app under Settings → Delete account. Any Coins you hold are lost when you do, and that cannot be undone. What deletion erases, and what stays on past leaderboards anonymously, is set out in the Privacy Policy.

We can suspend or end your access if you break these terms, or if we stop running the service.

Papermarkets is provided “as is” and “as available”. To the fullest extent the law allows, we disclaim all warranties, express or implied, including merchantability, fitness for a particular purpose and non-infringement.

We do not promise the service will be uninterrupted, secure or error-free, or that data, prices, Coins, positions or history will be accurate or preserved. It is early, and it will sometimes be down.

To the fullest extent the law allows, Mo Systems LLC and anyone working on Papermarkets will not be liable for any indirect, incidental, special, consequential or punitive damages, or for any loss of data, profits, goodwill or opportunity, arising out of your use of the service.

Our total liability to you for any claim relating to Papermarkets is limited to one hundred US dollars (US$100). The service is free and involves no real money, which is why that number is what it is.

Some places do not allow these exclusions, and if you use Papermarkets as a consumer you may have rights under the law where you live that no contract can take away. Nothing in these terms limits those rights.

We will update these terms as the product changes. When we do, we change the “last updated” date at the top of this page, and for a change that materially affects you we will say so in the app before it takes effect. Continuing to use Papermarkets after a change means you accept the new terms.

These terms are the whole agreement between you and Mo Systems LLC about Papermarkets. If a court finds part of them unenforceable, the rest still stands. If we do not enforce something straight away, we have not given up the right to enforce it later. You may not transfer your rights under these terms; we may transfer ours if the service changes hands.

These terms are governed by the laws of New York, United States, without regard to conflict-of-laws rules, and disputes will be heard in the courts there. The exception is where the law where you live gives you the right, as a consumer, to bring a claim in your own courts or under your own law.

Questions about these terms, a username, a bug you found, or anything else: write to mosystemsllc@gmail.com.