Ebb
• Backups include them, in a new backup format version. Update Ebb on other phones before restoring a new backup there.
Your data stays on your phone
• No account, no server, no sync. Everything you log is kept in a database on your device.
• No internet permission. Android itself stops Ebb from sending anything anywhere, and you can check that in the app's permission list.
• No analytics, advertising or tracking, and excluded from Android's cloud backup.
• Delete everything in Settings whenever you like.
An estimate that's honest about what it knows
Ebb learns your rhythm from your own recent cycles and shows the next period as a range, with how sure it is. With little history it leans on a typical 28-day cycle and says so. Irregular cycles get a wider window, not false confidence. The method is plain arithmetic, explained in the app.
Forgiving when life happens
• Forgot to log? Add a period on an earlier day, or fill in past ones.
• A cycle thrown off by illness or a medication change can be left out of the estimate, with a note to remember why.
• If periods go unlogged for a while, the estimate carries on, says so, and History points out the gaps.
Reminders without the cloud
A heads-up before your period is expected, scheduled on the phone itself, so it arrives with no signal and in airplane mode.
Backups and new phones
Save your history to a plain, documented file wherever you choose, or move it to another phone by scanning a few QR codes: one phone shows, the other looks. Nothing goes over a network.
More than one person
Helping a child who's just starting? Track them too, switch with a tap, and hand their history over to their own phone when the time comes.
There's no cloud copy of your history, so a lost phone means lost history unless you've saved a backup file.
Ebb is free, open source under the MIT licence, and has no ads or premium tier.
捐赠
版本
尽管下面提供了 APK 安装包的下载选项，但你应该注意，以这种方式安装将不会收到更新通知，这是一种不太安全的下载方式。 我们建议你安装使用 F-Droid 客户端。
下载 F-Droid-
x86_64该版本需要 Android 7.0 及以上版本。
此包由原始开发者构建并签名，并保证对应于此源代码 tarball。
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arm64-v8a该版本需要 Android 7.0 及以上版本。
此包由原始开发者构建并签名，并保证对应于此源代码 tarball。
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armeabi-v7a该版本需要 Android 7.0 及以上版本。
此包由原始开发者构建并签名，并保证对应于此源代码 tarball。
-
x86_64该版本需要 Android 7.0 及以上版本。
此包由原始开发者构建并签名，并保证对应于此源代码 tarball。
-
arm64-v8a该版本需要 Android 7.0 及以上版本。
此包由原始开发者构建并签名，并保证对应于此源代码 tarball。
-
armeabi-v7a该版本需要 Android 7.0 及以上版本。
此包由原始开发者构建并签名，并保证对应于此源代码 tarball。
-
x86_64该版本需要 Android 7.0 及以上版本。
此包由原始开发者构建并签名，并保证对应于此源代码 tarball。
-
arm64-v8a该版本需要 Android 7.0 及以上版本。
此包由原始开发者构建并签名，并保证对应于此源代码 tarball。
-
armeabi-v7a该版本需要 Android 7.0 及以上版本。
此包由原始开发者构建并签名，并保证对应于此源代码 tarball。
• On a calendar day, swipe or use the arrows to move to the day before or after.
• More faces no longer cuts faces off on phones with a larger display size.
• Charts: day ratings over any dates, and which feelings came around your periods.
• Moon phases on the calendar and charts, if you want them.
• Groups, for circles that track together: see everyone side by side with the moon. Off unless you turn it on in Settings → Advanced.
• Send just part of your history to another phone.
• Backups use a newer format: update Ebb on both phones before moving between them