Nothing leaves your device.
Notefall is made for children. It has no accounts, no ads, no analytics and no network access, and it collects no data.
Last updated September 28, 2026数据不会离开你的设备。
落音是为孩子设计的：没有账号，没有广告，没有统计分析，不联网，也不收集任何数据。
最后更新：2026 年 9 月 28 日The short version
The app listens through the microphone only to work out which piano key is being played. That sound is analysed in memory in real time and immediately discarded: it is never recorded, saved, or sent anywhere.
Microphone
Notefall asks for microphone access so it can hear your keyboard. Audio is processed on the device as it arrives to find the pitch of the note, then thrown away. No audio recording is ever stored or uploaded. You can switch the microphone off inside a song, or in iOS Settings, and still play with the on-screen keys.
What is stored on your device
- Progress and settings: your stars, chosen language, speed, and toggles, kept in the app's local storage.
- Practice logs: after a play-through the app may save a small text file listing which notes were expected, which notes were detected and when, and the score. It contains no audio and no personal information, stays in the app's own storage on your device, and is never uploaded. It is deleted when you delete the app.
What we do not do
- No accounts or sign-in.
- No third-party SDKs: no advertising, no analytics, no crash reporters.
- No tracking across apps or websites, and no selling or sharing of data. We collect none.
- The app does not connect to the internet, other than through Apple's App Store for purchases.
Purchases
The one-time Full Version is processed by Apple through the App Store. Notefall only learns whether the purchase is active; it never receives your payment details. Buying is behind a grown-up question so children cannot buy by accident.
Key stickers
The printable key stickers are created on the device. If you share or print them, that is done through the standard iOS share sheet, and only when you choose to.
Children
Notefall is designed for use by children with a parent nearby. Because it collects no personal information, there is nothing about a child to store, share, or delete on our side.
Changes to this policy
If these practices change, this page will be updated before the change takes effect, and the date above will be revised.
Questions
Email arthur.z.me@gmail.com.
简单来说
App 使用麦克风只是为了判断你按的是哪个琴键。声音在内存中实时分析，随即丢弃：不会被录制、保存，也不会发送到任何地方。
麦克风
落音请求麦克风权限，是为了听你的琴。音频在设备上边收边分析，得出音高后立刻丢弃，绝不会保存或上传任何录音。你可以在歌曲里关掉麦克风，或在 iOS 设置中关闭权限，仍然可以用屏幕上的琴键弹奏。
设备上保存的内容
- 进度和设置：星星、语言、速度和各个开关，保存在 App 的本地存储中。
- 练习记录：弹完一遍后，App 可能会保存一个很小的文本文件，记录应该弹的音、听到的音及时间、以及得分。里面没有音频，没有个人信息，只存在 App 自己的存储里，从不上传，删除 App 时一并删除。
我们不做的事
- 没有账号，不需要登录。
- 没有第三方 SDK：没有广告、统计分析和崩溃收集。
- 不跨 App 或网站追踪，不出售也不分享数据，因为我们不收集任何数据。
- 除通过 App Store 进行购买外，App 不连接互联网。
购买
一次性购买的完整版由 Apple 通过 App Store 处理。落音只会知道购买是否有效，收不到你的支付信息。购买前有一道家长验证题，防止孩子误买。
琴键贴纸
可打印的琴键贴纸在设备上生成。分享或打印时使用 iOS 标准的分享面板，并且只在你主动操作时才会发生。
儿童
落音面向有家长陪伴的孩子使用。由于不收集任何个人信息，我们这边没有关于孩子的任何数据可存储、分享或删除。
政策变更
如果上述做法有变化，本页面会在变更生效前更新，并修改上面的日期。
联系我们
请发邮件至 arthur.z.me@gmail.com。