Privacy Policy (English)

Last updated: September 27, 2026

This policy applies to Chaipo Online (the "App") by Rakko Apps ("we"). The App has no account registration and does not collect your real name, email address, phone number, location, contacts or photos. CPU games run only on your device. You can delete your ranked data yourself at any time with "Delete ranked data" in the App.

1. Stored on your device

Settings (language, difficulty, rules, sound, the name you typed); the "Remove Ads" purchase state and whether tutorials and notices have been shown; a random identifier generated by the App (the "in-app ID", not linked to your identity, Apple ID or any hardware identifier) and a random value generated on your device that proves you own it; your agreement to the ranked-play rules and the list of players you blocked; records of purchased stamina waiting to be added or already added (App Store transaction IDs); the room code of an ongoing or recent ranked match (so that a match you left by closing the App can be recorded and the room cleaned up); and the Firebase anonymous sign-in state (the auth ID in section 2).

2. Online play and ranked matches

Only when you use online play or ranked matches, the App sends the following to Google Firebase Realtime Database. For ranked matches (including reports and stamina) the App also uses Firebase Authentication's anonymous sign-in so that nobody else can change or delete your data. It uses only a random identifier issued by Firebase for each device (the "auth ID"); no email address, phone number, password or Apple ID is used, and the auth ID is never shown to other players. Online play with room codes and CPU games outside ranked matches do not use it.

• In-app ID — to recognise you as the same player (returning to your seat, keeping your rating and stamina). Other players' apps can read it together with World Ranking, match-room and waiting-list data (it is not shown on screen). If you use ranked matches, it is kept until you use "Delete ranked data" or we delete it.
• Auth ID and a random value generated on your device that proves you own your in-app ID — so that nobody can impersonate your in-app ID to change or delete your name, rating or stamina (including purchased stamina), and to identify who filed a report. The ownership value and its link to your in-app ID are private (other players cannot read them) and are deleted by "Delete ranked data". The auth ID is also included in reports you file (see below) and is kept until we delete it.
• The name you typed (up to 16 characters) — shown to your opponent and publicly on the World Ranking in ranked matches, and to the players in the same room in online play. Kept until you use "Delete ranked data" or we delete it (names written to a match room are deleted with the room).
• Rating, win/loss/draw counts and number of matches (plus the room code and time of the last recorded match, to avoid recording it twice) — for matchmaking and the World Ranking; public on the World Ranking. Kept until you use "Delete ranked data" or we delete it.
• Ranked waiting-list entry (in-app ID, name, rating, room code, time) — to find an opponent. Readable by the apps of other players using ranked matches; deleted when a match is made or you stop searching.
• Stamina balance and its timestamp (including purchased stamina) — to limit ranked matches and keep purchased stamina. Private (other players cannot read it). Kept until you use "Delete ranked data" or we delete it.
• Game data (room code, the names and in-app IDs of the seated players, ratings in ranked matches, dealt and placed cards, turn, connection state and the time of a disconnect, the room's creation and update times) — to run the match. Shared with the other players in the same room and stored so that anyone who knows the room code can read it. An online-play room is deleted by the App when everyone has left, and leftover rooms are deleted by us periodically (about 30 days after their last update). A ranked room is deleted after both players have recorded the result; a room whose opponent has not finished recording the result may remain, and such rooms are deleted by us periodically once they are more than 24 hours old.
• Reports filed in ranked matches (the reporter's auth ID, the reported player's in-app ID, the name at that time, the selected reason, and the time) — to deal with objectionable names and cheating. The reports on each player can be read by the apps of other players using ranked matches so that they can be counted, and a name with three or more reports is hidden automatically unless we have confirmed it is fine. The auth ID cannot be traced to the reporter's name or in-app ID (these records do not contain the reporter's in-app ID or name; our notification described in section 3 includes the sender's in-app ID). Reports are not deleted by "Delete ranked data" and are kept as long as needed to handle them.

Your name, rating and record are shown to your opponent and publicly on the World Ranking. Do not put your real name or contact details in your name. We do not use any of this for advertising or profiling. See Firebase's privacy information for how Firebase handles data.

3. Reports, blocks and contact form

You can report or block players in ranked matches and in online play. When you report or block a player, or send a message from More > Report an ad or More > Contact, the content (your message, the target's name and in-app ID, the reason, app state such as the app version, language, settings and device type, and your in-app ID) is saved to our records (a Google Sheets spreadsheet) through Google Apps Script and reviewed by us. It is used only to respond and to improve the App. The list of players you blocked is stored on your device.

4. In-app purchases

The App offers "Remove Ads" (non-consumable) and "Stamina" (consumable). All payments are processed by Apple; we never receive your payment details or Apple ID. Purchased stamina is stored with your in-app ID as described above.

5. Advertising (Google AdMob)

The App shows banner, interstitial and rewarded ads via Google AdMob. AdMob and its partners may collect and use device identifiers including the advertising identifier (IDFA), device information, ad interaction data, coarse (country/region) location and diagnostics for ad delivery, measurement and fraud prevention. On iOS an App Tracking Transparency prompt is shown; the App works exactly the same whether or not you allow tracking (ads are still shown but are less personalised). You can change this at any time in Settings > Privacy & Security > Tracking. See How Google uses information and the Google Privacy Policy.

6. Children

The App does not ask for personal information and has no chat or messaging. Because names entered for ranked matches and online play are visible to other players, parents should make sure children do not enter real names or contact details.

7. Deleting your data

Uninstalling the App removes on-device data. You can delete your ranked name, rating, record, stamina (including purchased stamina), waiting-list entry and the ownership record of your in-app ID yourself at any time with "Delete ranked data" at the bottom of the Ranked match screen; you disappear from the World Ranking and your next match starts with a new in-app ID and profile. The name saved on your device is also cleared (your agreement to the rules and your block list remain). Any remaining purchased stamina is deleted with it and won't be restored in the app (refunds are handled under Apple's terms). Reports are kept as a record for handling abuse and are not deleted by this; for other requests, such as deleting reports, use More > Contact in the App or email rakko9924@gmail.com. Because other players' apps can read in-app IDs, we direct requests to delete ranked data to the in-app button, which only you can use.

8. Changes to this policy

We may revise this policy when laws or the App change. Important changes will be announced on this page.

9. Contact

Rakko Apps (developer: RAITO SASAGAWA) — rakko9924@gmail.com