Hourflip (hflip.si, "we") is a web mini game run by an independent developer. This policy explains what data we collect, how we use it, and how you can ask us to delete it.
What we collect
You can play without signing up. We never ask for your name, email address, or phone number. We only collect what the game needs:
Data
Details
Player ID
An anonymous random ID created by our server the first time you play
Device code
A random code created by your browser, used to detect multiple accounts on one device
Language and nickname
Your interface language; nicknames are generated from preset words and cannot be typed freely
Invitation
Which invite code you joined with and who invited you
Game records
Scores, move logs, and start/finish times of each round
Feedback
The kind, ratings, and short comment you choose to send; we automatically attach which screen you were on, screen size, browser, and app version to help us find problems
Lab
Your progress in Lab games (how often you played, how far you got) and your one-tap ratings (fun or not, easy to understand or not)
Game suggestions
The game name, what you like about it, a short comment, and a link you choose to send; never shown publicly, used only to come up with new games
Transfer codes
One-time codes used when moving to a new phone or the Home Screen
Where you came from
On your first visit, the approximate country or region Cloudflare infers from your connection (we store only the country code, never your IP address); if you arrived through a link we posted on social media, which platform it was (for example, Instagram)
Your browser keeps your login token, language, and personal bests in localStorage so you can pick up where you left off. We do not set cookies ourselves; for advertising cookies, see "Advertising" below.
How we use it
To run the game, keep your records, and calculate rankings.
To verify scores by replaying move logs, and to detect cheating and abuse.
To understand overall play patterns and improve the game and how ads are placed.
What is shown publicly
Leaderboards show your nickname, score, and rank. After each daily reset, replays of the previous day's ranked rounds become visible to other players.
Services that handle data
Cloudflare: hosting and database. Cloudflare processes connection information such as your IP address to deliver the site and protect it from attacks. We also use Cloudflare Web Analytics to see overall traffic (no cookies, no individual tracking).
Google: advertising. See "Advertising" below.
Anthropic: we use an AI service (Claude) to sort and summarize player feedback, analyze suggested games, and come up with new games; we then decide what to change. Only feedback, ratings, and suggestions are sent, with nothing that identifies you. Please do not include personal information in feedback or suggestions.
We do not sell your data.
Advertising
Hourflip uses Google's advertising services. Ads never affect scores or rankings.
Third-party vendors, including Google, use cookies to serve ads based on your prior visits to this website or other websites.
Google's use of advertising cookies enables it and its partners to serve ads based on your visits to this site and/or other sites on the internet.
You may opt out of personalized advertising in Google Ads Settings, or opt out of other vendors' personalized advertising at aboutads.info.
Players in the European Economic Area, the UK, and Switzerland are asked for consent before personalized ads are used.
Retention and deletion
Game records are kept until you ask us to delete them or we shut down the service.
You can delete your data in the game under "Me → Settings → Delete my data". You can cancel within 7 days of the request. After 7 days we delete your nickname, game records, level progress, feedback, suggestions and daily reminder, and remove your scores from the leaderboards. Games flagged for review are kept without your nickname for up to 90 days, then deleted. Automatic database backups expire within 7 days. If you no longer have your device, email hello@hflip.si with your nickname and roughly when you last played (see Delete my data).
Rounds flagged for possible cheating keep their move logs for manual review.
Our internal weekly reports quote feedback comments; the original text is kept in those reports for 90 days, after which only the totals remain.
Clearing your browser data removes your login token; without a transfer code you cannot sign back in as the same player.
Children
Hourflip is not directed at children under 13, and we do not knowingly collect their data.
Changes
When this policy changes, we update the date at the top. Significant changes are announced in the game.
Cloudflare：サーバーとデータベース。サイトの配信と攻撃対策のため、IPアドレスなどの接続情報を処理します。全体のアクセス状況の把握に Cloudflare Web Analytics を使います（Cookie を使わず、個人を追跡しません）。
Google：広告。下の「広告」をご覧ください。
Anthropic：プレイヤーのフィードバックの整理・分類、推薦されたゲームの分析、新しいゲームの考案に AI サービス（Claude）を使い、改善内容は私たちが決めます。送るのはフィードバック・評価・推薦の内容だけで、個人を特定できる情報は含みません。フィードバックや推薦に個人情報を書かないでください。
データを販売することはありません。
広告
すなかえしは Google の広告サービスを利用しています。広告がスコアや順位に影響することはありません。
Google などの第三者配信事業者は Cookie を使用して、本サイトやほかのサイトへの過去のアクセス情報に基づいて広告を配信します。
Google が広告 Cookie を使用することにより、Google とそのパートナーは本サイトやインターネット上のほかのサイトへのアクセス情報に基づいて広告を配信できます。