一款开源的安卓应用，用于记录和跟踪月经生理期并计算可能的受孕日期，注重隐私且无需联网使用。
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Periodical 是一款专为安卓设备设计的开源应用，主要功能是帮助用户记录和跟踪月经生理周期，并计算可能的受孕日期。该应用特别注重用户隐私，所有数据都存储在本地，无需联网即可使用。需要注意的是，开发者不建议将此应用用作避孕工具。
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