Privacy Policy
Undersong · effective 31 August 2026
Undersong collects no data. None of it leaves your iPhone, because there is nowhere for it to go: the app contains no networking code at all.
Audio
The microphone is the app's entire function. Audio is analysed in memory, in real time, on your iPhone, using Apple's on-device Speech and Sound Analysis frameworks. It is never written to disk, never transmitted, and discarded as soon as it has been analysed. No recording of any kind is produced.
Transcripts
Finished conversations are saved only while Save transcripts is switched on, which you can turn off at any time. Saved transcripts live in the app's own storage on your iPhone, protected by the system's file encryption while the device is locked. They are never uploaded. Delete all transcripts removes them permanently.
What we do not do
- No account, no sign-in, no email address requested.
- No analytics, telemetry, crash reporting, or advertising, and no third-party SDK of any kind.
- No device identifiers read — no IDFA, no IDFV, nothing.
- No location access. The app is not linked against the location framework.
- Nothing is shared with anyone, because nothing is collected.
Diagnostic reports
The app can produce a diagnostic report, but only when you ask it to, and it is sent only where you choose to send it through the system share sheet. Reports contain build and device information, your settings, audio-pipeline counters and recent log lines. They contain no audio and no transcript text. Nothing is sent automatically.
Children
Undersong is suitable for all ages and collects no data from anyone, including children.
Changes
If this policy ever changes, the version in the App Store listing changes with it and this page is dated accordingly. A change that introduced any data collection would be stated at the top of this page, not buried in it.
Contact
隐私政策
Undersong · 2026 年 8 月 31 日生效
Undersong 不收集任何数据。任何内容都不会离开你的 iPhone，因为它无处可去： 这个应用完全不包含联网代码。
音频
麦克风就是这个应用的全部功能。音频在你的 iPhone 上、在内存中实时分析，使用 Apple 的设备端 语音与声音分析框架。它不会被写入磁盘，不会被传输，分析完成后立即丢弃。不会产生任何形式的 录音。
字幕记录
只有在「保存字幕记录」开启时，结束的对话才会被保存，你可以随时关闭它。保存的记录存放在这台 iPhone 上应用自己的存储空间中，设备锁定时受系统文件加密保护。它们绝不会被上传。 「删除全部记录」会永久移除它们。
我们不做的事
- 没有账号，无需登录，不索取电子邮件地址。
- 没有分析统计、遥测、崩溃上报或广告，也没有任何第三方 SDK。
- 不读取任何设备标识符。
- 不访问位置信息。应用没有链接位置框架。
- 不与任何人共享任何内容，因为什么都没有收集。
诊断报告
应用可以生成诊断报告，但只在你主动要求时，并且只发送到你通过系统共享菜单选择的地方。报告 包含版本与设备信息、你的设置、音频管线计数器和最近的日志，不包含音频，也不包含字幕 文字。不会有任何内容被自动发送。