Yiyosa Arena — TERMS OF SERVICE

Version 2.1 · Effective 28 September 2026 at 07:00 UTC

Yiyosa Arena is operated by Yiyosa Technology LLC, Delaware, USA.

1. WHAT THIS SERVICE IS

Yiyosa Arena is a free skill game with daily and weekly rankings, a world ranking, a friends league and collectible badges. - Playing costs nothing. There are no in-app purchases and no monetary rewards. - Rankings and badges are recognition only. They have no monetary value, cannot be exchanged, transferred or sold, and create no entitlement to any payment. - Watching rewarded videos is not mandatory to play. Optional rewarded ads unlock in-game jokers; no ad click is required. - No participant stakes money or anything of value.

2. TWO LEVELS OF USE

a) Guest play (default). Play immediately with a nickname you choose. Your verified runs enter the rankings under that nickname.

b) Signed-in play (optional). Sign in with Apple or Google to keep your rankings, badges and friends across devices and reinstalls. We ask only for the sign-in provider's identifier; your real name is never shown on any ranking.

3. ELIGIBILITY

- Minimum age 13. Users aged 13–17 need guardian consent to sign in. - One account per person. Sharing, selling or automating accounts is prohibited.

4. NICKNAMES, FRIENDS AND INVITES

- You choose your public nickname. Nicknames must not be offensive, misleading or impersonate others; we may change or remove a nickname that violates this. - Friends are added by mutual agreement (invite link, friend code or QR). You can remove or block a friend at any time; a blocked user cannot add you again. - Inviting friends never grants score, ranking advantage or extra attempts. Invite recognition is limited to cosmetic badges.

5. PROHIBITED CONDUCT

Automation, bots, scripts or AI play · modified clients, emulators, rooted/jailbroken devices · multiple accounts · tampering with inputs, network traffic or device clock · harassment through nicknames or invites.

6. COMPETITION TIME AND SCORING

UTC is the sole controlling time standard. Each competition day begins at 07:00 UTC; each competition week begins Monday at 07:00 UTC and ends at the next such boundary. Local time displayed in the app is informational only.

Attempts are unlimited and always free. Only your highest verified run counts on the daily ranking. Your weekly score is the average (rounded down) of your two highest daily scores plus 150 points for every distinct day with a verified run. Today's verified best counts immediately in the current week; at least two distinct days are required for the weekly ranking. Equal scores are ordered by more days played, then by who reached the score first.

Every ranked run is re-simulated on our servers. Timing, input patterns and move quality are analysed. Runs that fail verification are removed from the rankings. Closed days and weeks are kept as a permanent archive and are never recomputed.

7. FAIRNESS OF PIECE SEQUENCES

Each competition day has a secret; its fingerprint is published while the day is live and the secret is revealed after the day is final. This proof covers each run's starting seed and normal piece deck. The reroll joker uses a separate server-held seed disclosed only after its ad reward is verified; that seed is outside the daily secret proof. Reroll does not advance or otherwise change the normal deck position.

8. ADVERTISING AND JOKERS

The app displays third-party advertising. Google, AdMob, Apple and individual advertisers do not sponsor or endorse the rankings. A banner may appear in a fixed area at the bottom of the play screen. You do not need to watch or click it; the banner grants no joker, points or ranking advantage. Gameplay continues if the banner does not load.

Playing and starting new attempts do not require watching rewarded videos. Optional rewarded ads that unlock jokers are separate from the banner. Clicking an advertisement is never required for a joker.

Game version 5 offers three separate jokers. Each can be used at most once per run after our server verifies completion of an optional rewarded ad for that joker: - Undo two moves: restore the board, score, combo, tray and deck position from before the last two still-applied placements. At least two placements are required. No used joker right is ever refunded. - Rotate: choose one remaining piece and confirm a 90°, 180° or 270° rotation. A symmetric rotation that does not change the shape does not consume the right. - Reroll: replace all remaining pieces with three new pieces, whether one, two or three remain. A full tray is not replaced by the same ordered triple. Replacement pieces remain hidden until the ad reward is verified and are determined by its separate verified seed.

Jokers can affect scores and rankings by changing gameplay; they provide no cash or way to purchase points directly. An unavailable, failed or closed-before-completion ad does not consume a joker right. An earned but unused right remains available while the run is open and the competition day has not ended. If no legal move remains, you may use an available joker before confirming the end of the run. No new moves or jokers are allowed after the run is finished or the day closes. Existing version 3 and 4 runs continue under their original rules without jokers.

9. INTELLECTUAL PROPERTY

The code, design, audio and brand belong to the Company. The game mechanic (block placement, line clearing) is a general genre standard and is not claimed as exclusive.

10. LIMITATION OF LIABILITY

The service is provided "as is". The Company is not liable for outages, data loss or indirect damages. Because the service is free, the Company's total liability to you is limited to the greatest extent permitted by applicable law.

11. TERMINATION

Breach of these Terms may result in removal from rankings, loss of badges and account closure. You may delete your account at any time inside the app.

12. CHANGES

Changes are announced in the app. Scoring rules are never changed during a live week.

13. GOVERNING LAW

State of Delaware, USA. Contact: support@yiyosa.com