Wattlab Privacy Policy
Effective date: October 20, 2026
Wattlab measures how fast your phone charges with the current charger and cable, explains slow charging, compares your charger and cable setups, and estimates battery health over time. This policy explains what data the app handles.
Data stored on your device
Wattlab stores app settings, battery readings recorded during charge sessions and speed tests, your saved charger and cable setups, per-device calibration, battery capacity estimates, Pro entitlement status, and the expiry time of any temporary rewarded Insight Pass locally on your device. This information is used to show live charging data, history, comparisons, health estimates, and alerts. We do not operate a server, and battery readings never leave your device through the app.
Android backup may include your app settings only. Recorded charging data and calibration are excluded from backup. You can delete all recorded data at any time in Settings, or by uninstalling the app.
If you export a CSV file or share a result card, the file is created only when you ask for it and goes only to the location or app you choose.
Advertising and consent
The free version of Wattlab uses Google AdMob to show banner ads and optional rewarded ads. You may choose to watch a rewarded ad to unlock Insight Pass features for 24 hours. Watching a rewarded ad does not create a Google Play purchase, activate Pro, or remove ads. Pro users do not receive ads; for them the app only asks Google User Messaging Platform whether analytics needs consent.
Google Mobile Ads and Google User Messaging Platform may collect or process device identifiers, ad interaction data, diagnostics, and consent choices according to Google's policies. Where required, Google User Messaging Platform presents a consent message before ads are requested, and you can change your choice later in Settings. For more information, see the Google Privacy Policy and Google AdMob policies.
App usage analytics
Wattlab uses Google Analytics for Firebase to understand how the app is used, for example how often it is opened, whether speed tests finish, and whether the Pro purchase screen or rewarded ads work as expected. This includes an app-instance identifier, app interaction events, in-app purchase events, device model and Android version, app version, and a coarse location derived from your IP address. Some events carry coarse categories, such as a charging power range (for example "10–18 W"), the plug type, the speed verdict, and which battery fields your phone reports. Wattlab does not send raw battery readings, charge history, or battery capacity values, does not collect the Advertising ID for analytics, and does not use this data for advertising. Where your consent is required (for example in the EEA or UK), analytics only starts after you allow storing and accessing information on your device in the consent message.
Purchases
Wattlab Pro is a one-time purchase sold through Google Play Billing. Google Play processes purchases and payments. The app stores only whether Pro is active so it can remove ads and unlock Pro features. The temporary Insight Pass is separate from Google Play Billing and does not change your purchase status.
Permissions
Notifications are used for the recording status notification and for charge alerts you turn on. Foreground service access is used to record charge sessions in the background while the phone is plugged in, with a visible notification. Start-at-boot access is used only to resume automatic recording and charge alerts after a restart, when you have turned them on. Internet access is used only by ads, consent, analytics, and Google Play Billing. Wattlab does not request location, contacts, storage, or accessibility permissions.
Children
Wattlab is not designed for children.
Changes
If this policy changes, the updated version will be posted on this page with a new effective date.
Contact
tamariskx@gmail.com
Wattlab 隐私政策
生效日期：2026 年 10 月 20 日
Wattlab 用于测量手机在当前充电器和数据线下的实际充电速度，解释充电慢的原因，比较你用过的充电器和数据线组合，并长期估算电池健康。本政策说明应用会处理哪些数据。
保存在设备上的数据
Wattlab 在你的设备本地保存：应用设置、充电记录和测速时记录的电池读数、你保存的充电器和数据线组合、本机校准数据、电池容量估算、Pro 权益状态，以及激励广告临时通行证的到期时间。这些数据用于显示实时充电数据、历史记录、组合对比、健康估算和提醒。我们不运营服务器，电池读数不会通过本应用离开你的设备。
Android 备份最多只包含应用设置，充电记录和校准数据不会被备份。你可以随时在设置中清除全部记录数据，或卸载应用。
导出 CSV 或分享结果卡片时，文件只在你主动操作时生成，并且只发送到你选择的位置或应用。
广告与同意
Wattlab 免费版使用 Google AdMob 展示横幅广告和可选的激励广告。你可以选择观看一次激励广告，在 24 小时内解锁通行证功能。观看激励广告不会产生 Google Play 购买，不会开通 Pro，也不会移除广告。Pro 用户不会看到广告；对 Pro 用户，应用只会向 Google 用户消息平台查询分析功能是否需要征得同意。
Google 移动广告和 Google 用户消息平台可能按照 Google 的政策收集或处理设备标识符、广告互动数据、诊断信息和同意选择。在法律要求的地区，Google 用户消息平台会在请求广告之前显示同意消息，你之后也可以在设置中更改选择。详情请参阅 Google 隐私权政策 和 Google AdMob 政策。
应用使用分析
Wattlab 使用 Google Analytics for Firebase 了解应用的使用情况，例如打开频率、测速是否完成、Pro 购买页和激励广告是否正常工作。收集内容包括应用实例标识符、应用内互动事件、应用内购买事件、设备型号和 Android 版本、应用版本，以及根据 IP 地址推断的大致位置。部分事件带有粗略分类，例如充电功率区间（如“10–18 W”）、充电方式、速度结论，以及手机提供了哪些电池字段。Wattlab 不发送原始电池读数、充电历史或电池容量数值，不为分析收集广告 ID，也不把这些数据用于广告。在需要征得同意的地区（例如欧洲经济区和英国），只有当你在同意消息中允许在设备上存储和访问信息后，分析才会开始。
购买
Wattlab Pro 是通过 Google Play 结算销售的一次性购买，由 Google Play 处理购买和付款。应用只保存 Pro 是否已开通，用于移除广告和解锁 Pro 功能。临时通行证与 Google Play 结算无关，不会改变你的购买状态。
权限
通知权限用于记录状态通知和你开启的充电提醒。前台服务用于在插电时于后台记录充电过程，并始终显示通知。开机启动仅用于在重启后恢复你已开启的自动记录或充电提醒。网络访问只用于广告、同意流程、分析和 Google Play 结算。Wattlab 不申请位置、通讯录、存储或无障碍权限。
儿童
Wattlab 并非为儿童设计。
政策变更
如本政策有变更，更新后的版本会发布在本页面，并注明新的生效日期。
联系方式
tamariskx@gmail.com