Privacy Policy

Solitaire Rails · Last updated: July 21, 2026

Solitaire Rails ("the game", "we", "us") is a single-player solitaire card game with a cozy railway-and-homestead theme. We collect as little data as possible — just enough to run the online Happiness leaderboard, let players visit one another's homesteads, and, when we advertise the game, measure which campaign led to your install. This page explains what we collect and why.

Information we collect

• Nickname — a name you choose (up to 24 characters). It is shown publicly on the leaderboard and when other players visit your homestead. English text only.
• Happiness score & collection — your homestead Happiness (a number derived from the animals you have collected) is submitted to the global leaderboard, along with the set of animals in your homestead so that other players can view it. This is gameplay data, not personal data.
• Visit count — a running total of how many times your homestead has been visited by other players.
• Anonymous account ID — a random identifier created by Firebase Anonymous Authentication so the game can save your leaderboard entry. It is not linked to your real name, email, phone number, or any other real-world identity.
• Analytics (Firebase / Google Analytics) — we use Firebase Analytics to understand how the game is played in aggregate (for example, levels started and completed, boosters used, and retention milestones). This may include a mobile advertising identifier and basic device and event information, used for aggregate product analytics only.
• Advertising identifier & attribution data (Adjust) — we use Adjust, a mobile measurement provider, to measure installs, sessions, and a few gameplay milestones, and — when we promote the game through advertising — to understand which campaign led to your install. This may include your device's advertising identifier (GAID on Android, IDFA on iOS), a truncated IP address, and basic device and install/event information. It is used for attribution and aggregate measurement only, not to identify you personally, and the game itself shows no ads.

Information we do NOT collect

• No real name, email address, phone number, or postal address.
• No precise or coarse location.
• No contacts, photos, files, microphone, or camera access.
• No in-app advertising — the game shows no ads. (We do read your device's advertising ID for install attribution and aggregate analytics only — see above.)
• No profile-based ad targeting inside the game, and no selling of your data.

How we use your information

• To display the Happiness leaderboard (your nickname and Happiness score).
• To let other players visit your homestead (your nickname, the animals you have collected, and your visit count) and to let you visit theirs.
• To understand, in aggregate, how the game is used so we can improve it.
• To measure installs/sessions/milestones and, when advertising, attribute installs to campaigns (aggregate measurement only).

Where your data is stored and who can access it

Leaderboard and homestead data is stored and processed using Google Firebase (Firebase Authentication, Cloud Firestore, and Firebase Analytics), which acts as our data processor. Google's handling of this data is governed by the Firebase Privacy and Security terms and the Google Privacy Policy.

Attribution and measurement data is processed by Adjust acting as our service provider, under Adjust's Privacy Policy. When you install the game after interacting with one of our advertisements, Adjust shares limited attribution information — such as which advertising campaign led to the install — with the advertising network that served the ad, so the campaign's performance can be measured. We do not sell your data, and apart from this attribution measurement we do not share it with advertisers or other third parties.

Network access

The app uses the internet only to sync leaderboard and homestead data with Firebase and to send analytics and attribution measurements to Firebase and Adjust. The rest of the game works offline.

Data retention and deletion

Your leaderboard and homestead entry is tied to your anonymous account so it can persist. To have your nickname and leaderboard/homestead entry deleted, email us at the address below and we will remove them.

Your choices

You can reset your device's advertising identifier or opt out of ad personalization at any time in your device settings (Android: Settings → Privacy → Ads; iOS: Settings → Privacy & Security → Tracking). Doing so limits analytics and attribution measurement; it does not affect the leaderboard.

Children's privacy

The game is not directed at children under 13, and we do not knowingly collect personal information from children. The only personal data the game stores is a nickname you choose. If you believe a child has provided data, contact us and we will delete it.

Contact

Questions or data-deletion requests: dev@nextad.ai

Solitaire Rails · ai.nextad.solitairerails