心算日課
隱私權政策
最後更新：2026 年 11 月 7 日（招募網頁加入「用 Google 帳號帶入 Email」與官方 LINE）
「心算日課」（以下稱「本 App」）由紫芙數位（以下稱「我們」）提供。本政策說明我們收集哪些資料、怎麼使用，以及你有哪些選擇。
先說重點
- 不需要註冊或登入就能練習。沒登入時，練習紀錄只存在你的手機裡。
- 你選擇登入 Google 帳號時，練習紀錄會備份到雲端；購買高級會員、分享碼、排行榜與好友對戰也需要登入。
- 只有你主動送出「回報問題」或「許願」時，那一次的內容才會傳給我們。
- 免費版有獎勵式廣告，只有你自己按「看廣告」才會播放；高級會員沒有廣告。本 App 有匿名的使用數據與當機回報（預設開啟，可在「設定 → 關於」關閉）。
我們收集的資料
| 資料 | 何時收集 | 用途 |
|---|---|---|
| Google 帳號的 ID、電子郵件地址、顯示名稱 | 你在「設定 → 帳號與備份」選擇用 Google 登入時，由 Google Firebase 保存。登入畫面由 Google 提供，依 Google 隱私權政策處理 | 辨認是你的帳號，讓你在其他手機登入時取回紀錄、會員資格。不會用來寄信或行銷 |
| 練習紀錄 | 登入後，每次練習完自動同步：每天的題數、答對、作答時間、蓋章與補簽、各題型等級、錯題、九九乘法統計、技巧課與挑戰的成績、補簽券與碎片 | 備份與跨手機同步 |
| 購買紀錄 | 你在 App 內購買訂閱或終身會員時：Google Play 的購買憑證、方案、到期時間。付款由 Google Play 處理，我們拿不到你的付款資料 | 確認會員資格、讓同一個帳號在其他手機也能使用 |
| 分享碼與兌換紀錄 | 登入後自動產生你的分享碼；兌換代碼時記下哪個帳號兌換了哪組代碼、時間 | 發放會員天數、防止重複兌換 |
| 暱稱、排行榜成績、好友對戰 | 你在「排行榜與對戰」取暱稱、練完挑戰或每日一題、出題或交對戰成績時：暱稱、分數、出的題目、答對題數與時間 | 顯示排行榜與對戰成績。其他登入的使用者看得到你的暱稱與成績，看不到你的 Google 名字或信箱 |
| 心願 | 年訂閱與終身會員在「許願」送出的文字、App 版本 | 評估要不要做成新功能；在 App 裡回覆你 |
| 匿名帳號識別碼 | 你沒登入、第一次送出回報時，由 Google Firebase 自動建立。不含你的姓名或信箱 | 計算每天可回報的次數；讓你收到回報的處理進度 |
| 回報問題內容 | 你送出回報時：你寫的說明、當下的畫面截圖（送出前可預覽、重拍或移除）、App 版本、機型、Android 版本、所在畫面、語言、字體縮放、深色模式、各題型等級、今天的練習狀況、手機時間、帳號識別碼，以及用 Google 登入時的帳號電子郵件（讓我們知道是哪個帳號回報的；沒登入就不會附上） | 重現並修正問題；把處理進度送回你的 App |
| 匿名使用數據與當機回報 | 你使用本 App 或 App 當機時（預設開啟，可在「設定 → 關於」關閉） | 了解哪些練習被使用、找出並修正當機。只包含練習類型、答對題數與題數、裝置型號與系統版本、App 版本、匿名的安裝識別碼；不含你的帳號、題目內容或作答細節。由 Google Firebase（Analytics、Crashlytics）處理 |
| 廣告 ID 與裝置資訊 | 你按「看廣告」時，由 Google AdMob 處理（需要的地區會先請你同意） | 播放獎勵式廣告、防止詐欺；依 Google 隱私權政策處理。你可以隨時在手機系統設定重設或刪除廣告 ID |
我們不會收集你的位置、通訊錄、照片或麥克風。每日提醒、每週報告由手機本機產生，不會傳送任何資料；桌面小工具與聽算的語音也都在手機上產生。分享進度卡、分享碼、邀請朋友對戰時，文字與圖片是在手機上產生、交給你選的 App 分享，我們收不到。匯出的紀錄檔只存在你選的位置。
截圖要特別注意：截圖就是你當下手機上本 App 的畫面。送出前請先看過預覽，不想傳的可以移除截圖。
資料存放在哪裡
雲端資料存放在 Google Firebase（Authentication、Firestore、Cloud Functions），傳輸過程加密。雲端備份、會員與購買紀錄只有登入的本人讀得到；回報與心願只有你和開發者看得到；暱稱、排行榜與對戰成績登入的使用者都看得到。
保存多久
- 雲端備份、會員與購買紀錄、分享碼、暱稱：保存到你刪除帳號為止。
- 排行榜：每週（每日一題是每天）換新的榜；舊的榜保存到你刪除帳號為止。好友對戰的成績同樣。
- 回報：標記為已處理時，截圖會立即刪除；其餘內容在處理完成後定期清除，最長保存 60 天。
- 心願：保存到你刪除帳號為止。
- 以上只要你提出，都可以提前刪除。
我們不會做的事
- 不會出售你的資料。
- 不會把你的資料提供給第三方做廣告用途（獎勵式廣告由 Google AdMob 依它的政策處理）。
- 不會把你的資料用在與本 App 無關的用途。
刪除帳號與資料
- 刪除帳號：在 App 的「設定 → 帳號與備份 → 刪除帳號與雲端資料」，再選一次 Google 帳號確認身分，就會刪除帳號本身、雲端上的練習紀錄、會員與購買紀錄、分享碼、心願、暱稱、排行榜與對戰成績，以及這支手機上的練習紀錄（想留一份可以先在「設定 → 紀錄」匯出紀錄檔）。已付款的訂閱請另外到 Google Play 取消，刪除帳號不會自動退款或取消。
- 只清除紀錄：「設定 → 清除所有練習紀錄」。登入中會連雲端備份一起清除；沒登入只清這支手機。
- 不方便用 App 刪除，或要刪除送出過的回報：來信 zifubazaar@gmail.com，請附上登入用的 Google 信箱，或回報送出的大約時間與內容摘要，我們會據此找出並刪除。
- 移除本 App 會刪除手機上的所有練習紀錄；雲端資料不會因此刪除，需要刪除請依上述方式。
你的選擇
- 不想上傳任何資料：不要登入、不要使用「回報問題」，練習功能照常使用。
- 不想看廣告：廣告只有你自己按才會播放；不按就不會有。
- 不想出現在排行榜：不要取暱稱就不會上榜；已上榜的，刪除帳號會一併刪除。
- 不想收到通知：在 App 的設定關掉每日提醒、每週報告，或在手機系統設定關閉本 App 的通知。
封閉測試招募
我們在招募網頁（quickmath-drill.web.app/join）收集以下資料，與 App 內的帳號資料分開存放，存放在 Google Firebase（Firestore）：你填寫的 Email、你使用的手機系統（Android／iPhone）、是否同意連續測試 14 天的條件、之後願不願意測試新產品、想不想要 iOS 版，以及登記時間。
用途只有：安排 Google Play 封閉測試（僅限 Android 使用者）、測試完成後發放獎勵，以及依你的回答，日後通知你新產品測試或 iOS 版的消息。我們不會用這些資料發送廣告，也不會出售或提供給第三方；你的 Email 會提供給 Google Play 作為測試名單，依 Google 的隱私權政策處理。
招募網頁有一顆選用的「用 Google 帳號帶入 Email」按鈕：按下後會跳出 Google 帳號選單，我們只讀取你選的那個帳號的 Email 來填進欄位，讀完後會立即刪除這次按按鈕時剛建立的暫時登入紀錄（只用來讀取 Email，不會用在 App），不保存你的 Google 名稱、頭像或其他資料；如果你本來就有心算日課的帳號，這個動作不會刪除或更動它。不想用的話，也可以直接輸入 Email。
招募網頁另提供官方 LINE 連結，加入好友或用 LINE 傳送你的帳號給我們都是選擇性的；這些訊息由 LINE 依其隱私權政策處理，我們只用來確認你的登記與聯絡測試事項。
為了防止有人用程式大量登記假資料占用名額，你送出登記時，我們會暫存你的網路來源 IP 位址經單向雜湊後的值與送出時間（不保存原始 IP 位址），只用來限制同一個網路在短時間內的登記次數，隔天自動刪除。
登記之後，招募網頁上「加入測試群組」「成為測試人員」「前往 Play 商店下載」三個按鈕，你第一次按下每一個時，我們會在你的登記資料裡記下按的時間（不記錄你在 Google 群組或 Play 商店裡做了什麼），只用來統計多少人完成加入流程；為了做到這件事，你的 Email 會存在你自己的瀏覽器（localStorage）裡。這些時間和登記資料一起保存、一起刪除。
你可以隨時來信 zifubazaar@gmail.com 要求查詢或刪除你的登記。刪除招募登記只會刪除招募網頁上的資料，不會影響你的 App 帳號。
封閉測試期間的使用紀錄（2026 年 10 月 19 日起）：封閉測試期間，如果你在 App 內用 Google 登入，App 每天第一次打開時會告訴我們的伺服器「這個帳號今天打開過」。我們記下你的 Google 帳號 Email、名稱、帳號識別碼、App 版本，以及有打開的日期（台灣日期），用來確認誰參加了測試、測了幾天，好發放測試獎勵（高級會員）。不記錄你在 App 裡做了什麼；沒登入的不會記。在 App 內「我的 → 帳號與資料 → 刪除帳號與雲端資料」會一併刪除這份紀錄。
兒童
本 App 不是專為 13 歲以下兒童設計，我們不會刻意收集兒童的個人資料。
政策更新
我們可能會更新本政策，重大變更會在 App 內或上架頁面通知。
聯絡我們
紫芙數位 zifubazaar@gmail.com
QuickMath
Privacy Policy
Last updated: November 7, 2026 (sign-up page adds “Fill in my email with Google” and our official LINE)
QuickMath (“the App”) is provided by Zifu Digital (“we”). This policy explains what data we collect, how we use it, and the choices you have.
The short version
- You can practice without signing up or signing in. If you don’t sign in, your practice records stay on your phone only.
- If you choose to sign in with Google, your records are backed up to the cloud. Premium membership, share codes, leaderboards and friend battles also need sign-in.
- Data is sent to us only when you choose to send a bug report or a wish, and only that one submission.
- The free version has rewarded ads that play only when you tap “Watch an ad”; Premium members see no ads. The App has anonymous usage data and crash reports (on by default; you can turn them off in Settings → About).
Data we collect
| Data | When | Why |
|---|---|---|
| Your Google account ID, email address and display name | When you sign in with Google in Settings → Account & backup, stored by Google Firebase. The sign-in screen is provided by Google under the Google Privacy Policy | To recognize your account so you can restore your records and membership on another phone. Never used for email or marketing |
| Practice records | After you sign in, synced after each session: daily problem counts, correct answers, answer times, stamps and make-ups, level for each topic, missed problems, times-table stats, lesson and challenge results, make-up tickets and fragments | Backup and syncing across phones |
| Purchase records | When you buy a subscription or lifetime membership in the App: the Google Play purchase token, plan and expiry date. Payment is handled by Google Play; we never see your payment details | To confirm membership and let the same account use it on other phones |
| Share codes and redemptions | Your share code is created after you sign in; when you redeem a code we record which account redeemed which code, and when | To grant membership days and prevent double redemption |
| Nickname, leaderboard scores, friend battles | When you set a nickname in Leaderboard & battles, finish a challenge or the daily puzzle, or create or play a battle: your nickname, scores, the problems you set, correct answers and time | To show leaderboards and battle results. Other signed-in users can see your nickname and scores, but not your Google name or email |
| Wishes | Text that yearly and lifetime members send under “Feature wishes”, plus the App version | To consider new features and reply to you in the App |
| Anonymous account ID | Created automatically by Google Firebase the first time you send a bug report without signing in. It contains no name or email | To count daily report limits and send you progress updates on your report |
| Bug report contents | When you send a report: your description, a screenshot of the current screen (you can preview, retake or remove it before sending), App version, device model, Android version, current screen, language, font scale, dark mode, topic levels, today’s practice, phone time, account ID and, if you signed in with Google, your account email (so we know which account sent it; not attached if you are not signed in) | To reproduce and fix the problem, and send progress updates back to your App |
| Anonymous usage data and crash reports | While you use the App or when it crashes (on by default; you can turn it off in Settings → About) | To see which kinds of practice are used and to find and fix crashes. Only the practice type, number correct and total, device model and OS version, App version and an anonymous install ID — never your account, problem content or answer details. Processed by Google Firebase (Analytics, Crashlytics) |
| Advertising ID and device information | When you tap “Watch an ad”, processed by Google AdMob (in regions where it is required, you will be asked for consent first) | To show rewarded ads and prevent fraud, under the Google Privacy Policy. You can reset or delete your advertising ID in your phone’s settings at any time |
We do not collect your location, contacts, photos or microphone. Daily reminders and weekly reports are created on your phone and send no data; the home-screen widget and listening-practice voice are also produced on the phone. When you share a progress card, a share code or a battle invitation, the text and image are made on your phone and handed to the app you choose; we don’t receive them. Exported record files are saved only where you choose.
About screenshots: a screenshot shows exactly what the App displays on your phone at that moment. Please check the preview before sending, and remove the screenshot if you’d rather not send it.
Where data is stored
Cloud data is stored in Google Firebase (Authentication, Firestore, Cloud Functions) and encrypted in transit. Only you, while signed in, can read your cloud backup, membership and purchase records; only you and the developer can see your bug reports and wishes; nicknames, leaderboard and battle scores are visible to signed-in users.
How long we keep it
- Cloud backup, membership and purchase records, share code, nickname: until you delete your account.
- Leaderboards: a new board starts every week (every day for the daily puzzle); old boards are kept until you delete your account. The same applies to friend battle results.
- Bug reports: screenshots are deleted as soon as a report is marked handled; the rest is cleared regularly after it is resolved and kept for no more than 60 days.
- Wishes: until you delete your account.
- You can ask us to delete any of these sooner.
What we never do
- We never sell your data.
- We never give your data to third parties for advertising (rewarded ads are handled by Google AdMob under its own policies).
- We never use your data for purposes unrelated to the App.
Deleting your account and data
- Delete your account: in the App, go to Settings → Account & backup → Delete account and cloud data, then choose your Google account again to confirm. This deletes the account itself, your cloud practice records, membership and purchase records, share code, wishes, nickname, leaderboard and battle scores, and the practice records on this phone (to keep a copy, export a record file first in Settings → Records). Paid subscriptions must be cancelled separately in Google Play; deleting your account does not cancel or refund them.
- Clear records only: Settings → Clear all records. While signed in this also clears your cloud backup; otherwise it clears only this phone.
- If you can’t use the App, or want a sent bug report deleted: email zifubazaar@gmail.com with the Google email you signed in with, or the approximate time and a summary of the report, and we will find and delete it.
- Uninstalling the App deletes all practice records on your phone; cloud data is not deleted this way. To delete it, use the options above.
Your choices
- Don’t want to upload anything: don’t sign in and don’t send bug reports. Practice works as usual.
- Don’t want ads: ads play only when you tap the button; if you don’t, there are none.
- Don’t want to appear on leaderboards: don’t set a nickname. If you’re already on a board, deleting your account removes you.
- Don’t want notifications: turn off daily reminders and weekly reports in the App’s settings, or turn off the App’s notifications in your phone settings.
Closed-test sign-up
On the sign-up page (quickmath-drill.web.app/join) we collect the following, stored separately from in-app account data in Google Firebase (Firestore): the email you enter, your phone system (Android / iPhone), whether you agree to the 14-day continuous testing condition, whether you'd like to test future products, whether you want an iOS version, and the time you signed up.
We use it only to arrange the Google Play closed test (Android users only), give out rewards when the test is completed, and, depending on your answers, tell you about future new-product tests or an iOS version. We do not use this data for advertising and we never sell it or share it with third parties; your email is given to Google Play as part of the tester list and handled under Google's privacy policy.
The sign-up page has an optional “Fill in my email with Google” button. When you tap it, a Google account chooser appears and we read only the email of the account you pick, to fill in the field. Right after reading it, we delete the temporary sign-in record created by that tap (it is used only to read your email, never for the app), and we do not keep your Google name, profile picture or any other data. If you already have a QuickMath account, this never deletes or changes it. If you prefer, you can simply type your email instead.
The sign-up page also offers a link to our official LINE account. Adding us as a friend or sending us your account through LINE is entirely optional; those messages are handled by LINE under its own privacy policy, and we use them only to confirm your sign-up and to contact you about the test.
To stop automated fake sign-ups from using up the spots, when you submit we temporarily store a one-way hash of your network IP address and the time of submission (we never store the IP address itself). It is used only to limit how many sign-ups can come from the same network in a short time, and it is deleted automatically the next day.
After you register, the first time you tap each of the three buttons on the sign-up page (“Join the test group”, “Become a tester” and “Download on Google Play”), we record the time in your sign-up record (we do not record anything you do in Google Groups or on Google Play). It is used only to count how many people completed the joining steps; to do this, your email is kept in your own browser (localStorage). These times are kept and deleted together with your sign-up.
You can email zifubazaar@gmail.com at any time to see or delete your sign-up. Deleting your sign-up only removes the sign-up page data and does not affect your app account.
Usage record during the closed test (from October 19, 2026): during the closed test, if you are signed in with Google in the App, the first time you open the App each day it tells our server “this account opened the App today”. We record your Google account email, name, account ID, App version and the dates you opened the App (Taiwan time), only to confirm who took part in the test and for how many days so we can give out the test reward (premium membership). We do not record what you do in the App, and nothing is recorded if you are not signed in. Deleting your account and cloud data in the App (Me → Account & data) also deletes this record.
Children
The App is not designed for children under 13, and we do not knowingly collect personal data from children.
Changes to this policy
We may update this policy. Significant changes will be announced in the App or on the store listing.
Contact
Zifu Digital · zifubazaar@gmail.com