PDF 閱讀器 隱私權政策
簡介
PDF 閱讀器不需要註冊帳號，也沒有自己的伺服器：你開啟的 PDF 只在你的手機上顯示，不會被上傳。唯一會把資料傳到裝置外的，是顯示廣告的 Google AdMob。
本政策適用於 karta 開發的 Android 應用程式「PDF 閱讀器」（英文名稱 PDF Reader，套件名稱 com.karta.tools.pdfreader，以下稱「本 App」），自 2026 年 10 月 27 日起生效。
本 App 使用的資料與權限
下列資料都在你的裝置上處理，我們不會收到，也不會上傳到任何伺服器。
| 資料或權限 | 用途 | 存放位置 |
|---|---|---|
| 你開啟的 PDF 檔 | 透過系統檔案選擇器，或由其他 App 以「開啟方式」交給本 App；本 App 只能讀取你選的那個檔案，並在手機上把頁面畫出來 | 不複製、不儲存檔案內容 |
| 最近開啟清單 | 記錄檔名、檔案位置與你上次看到的頁數，方便下次接著看 | 本 App 在裝置上的私有儲存空間 |
| 免廣告時間 | 看完獎勵影片後記錄免廣告的到期時間 | 本 App 在裝置上的私有儲存空間 |
本 App 不會要求相機、位置、聯絡人、麥克風或存取全部檔案等權限；連上網路只是為了載入廣告。
廣告（Google AdMob）
本 App 會顯示 Google AdMob 提供的橫幅廣告、原生廣告、插頁式廣告，以及你自願觀看的獎勵影片。為了放送與評估廣告，AdMob 可能會蒐集並傳送以下資料給 Google：
- 廣告 ID（Android 廣告識別碼）
- IP 位址，以及由此推估的大略位置
- 裝置與系統資訊，例如裝置型號、作業系統版本、語言
- 廣告互動資料，例如廣告是否顯示、是否被點擊
- 當機與效能等診斷資訊
Google 可能使用這些資料提供個人化廣告。你可以在 Android 的「設定 > Google > 廣告」（各廠牌位置略有不同）刪除或重設廣告 ID，或選擇不接收個人化廣告。Google 如何使用這些資料，請參閱Google 如何使用合作夥伴網站或應用程式中的資訊及 Google 隱私權政策。
你開啟的 PDF 內容、檔名和最近開啟清單都不會提供給 AdMob。
資料分享、保存與刪除
- 分享：我們不販售、不出租你的資料。除了上述 Google AdMob，本 App 不會把任何資料傳給他人。
- 保存：最近開啟清單會保留在裝置上，直到你清除。若你開啟了 Android 的系統備份，這份清單可能隨你的裝置備份存到你自己的 Google 帳戶。
- 刪除：在首頁「最近開啟」按「清除」即可刪除清單；解除安裝本 App 也會刪除所有資料。你的 PDF 檔案本身不受影響。
- 安全性：清單存放在 Android 給本 App 的私有儲存空間，其他 App 無法讀取。
- 兒童隱私：本 App 並非專為 13 歲以下兒童設計，我們也不會有意蒐集兒童的個人資料。
- 政策變更：本政策如有更新，會在此頁公布並更新生效日期。
- 聯絡我們：對本政策有任何問題，請寄信至 developerkarta@gmail.com。
PDF Reader Privacy Policy
PDF Reader needs no account and has no server of its own: the PDFs you open are displayed on your phone and never uploaded. The only data that leaves the device goes to Google AdMob, which shows ads.
This policy covers the Android app "PDF Reader" (package com.karta.tools.pdfreader) by karta, effective October 27, 2026.
Data and permissions the app uses
All of the following is processed on your device. We never receive it, and it is not uploaded to any server.
| Data or permission | Purpose | Where it is kept |
|---|---|---|
| PDF files you open | Picked in the system file picker, or handed to the app by another app through "Open with"; the app can read only that file and renders its pages on your phone | File contents are not copied or stored |
| Recent files list | File name, file location and the page you were on, so you can pick up where you left off | The app's private storage on your device |
| Ad-free time | When an ad-free period earned by watching a rewarded video ends | The app's private storage on your device |
The app does not ask for camera, location, contacts, microphone or all-files access. It uses the network only to load ads.
Advertising (Google AdMob)
The app shows Google AdMob banner, native and interstitial ads, and rewarded videos you choose to watch. To serve and measure ads, AdMob may collect and send to Google:
- Your advertising ID (Android Advertising ID)
- Your IP address and the approximate location derived from it
- Device and system information, such as device model, OS version and language
- Ad interactions, such as whether an ad was shown or tapped
- Diagnostics such as crashes and performance
Google may use this data to show personalized ads. You can delete or reset your advertising ID, or opt out of personalized ads, under Settings > Google > Ads on Android (the exact path varies by device). See How Google uses information from sites or apps that use its services and the Google Privacy Policy.
The contents and names of your PDFs and your recent files list are never shared with AdMob.
Sharing, retention and deletion
- Sharing: We do not sell or rent your data. Apart from Google AdMob, the app sends no data to anyone.
- Retention: The recent files list stays on your device until you clear it. If Android system backup is on, the list may be included in your device backup to your own Google account.
- Deletion: Tap Clear next to Recent on the home screen to delete the list; uninstalling the app deletes all of its data. Your PDF files themselves are not affected.
- Security: The list is kept in app-private storage that other apps cannot read.
- Children: The app is not directed at children under 13, and we do not knowingly collect children's personal information.
- Changes: Updates to this policy will be posted on this page with a new effective date.
- Contact: Questions about this policy? Email developerkarta@gmail.com.