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  • Natus: Fertility Journal screenshot 1
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About Natus: Fertility Journal

Understanding your menstrual cycle starts with observation. Natus is a private natural fertility journal designed to make recording your cycle simpler, clearer and faithful to what you observe each day. No automatic predictions and no determination of fertile days or ovulation. Natus organizes the information you record so you can follow your history with clarity. With Natus, you can record: • sensations and appearance observed throughout the day • cervical mucus and bleeding • menstrual cycle information • chart symbols and markings • intercourse • symptoms and medications • basal body temperature • saliva crystallization • personal notes TRACK YOUR HISTORY View your records in clear charts, follow your observations throughout each cycle and keep your history in one place. TRACK TOGETHER If you choose, share your tracking with your husband. This allows both of you to take part in recording observations and follow the same journey with greater closeness and organization. TRACKING WITH AN INSTRUCTOR You can also invite an instructor to follow your records, making individual follow-up and guidance easier. REPORTS Generate clear reports of your observations to save, share or use during professional follow-up, including MOB-format report options. NATUS PREMIUM Essential recording features remain available for free. Natus Premium offers additional features, including tracking with your husband, tracking with an instructor, basal body temperature, saliva crystallization and advanced reports. PRIVACY AND CONTROL You remain in control of your records and decide when and with whom you want to share them. Natus was created for those who want to observe their cycle with attention, consistency and clarity. Your records tell a story. Natus helps you organize it. Natus is a personal recording and tracking tool. It does not provide diagnoses, determine fertile periods, prescribe treatments or replace medical advice or advice from other healthcare professionals. Privacy Policy: https://appnatus.luminadigital.app/privacy/ Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

What’s new

Version 2.1 · Updated September 17, 2026

We’ve improved the sign-up and invitation experience, refined the interface for different screen sizes, and fixed minor issues to make Natus more stable and easier to use.

App privacy

The developer, Guilherme Magalhaes da Silva, reported these privacy practices to Apple.

Data Linked to You

The following data, which may be collected and linked to your identity, may be used for the following purposes:

  • Health & Fitness: Health
  • Purchases: Purchase History
  • Contact Info: Email Address, Name
  • User Content: Other User Content
  • Identifiers: User ID
  • Usage Data: Product Interaction

Used for: App Functionality

Data Not Linked to You

The following data, which may be collected but is not linked to your identity, may be used for the following purposes:

  • Usage Data: Product Interaction

Used for: Developer’s Advertising or Marketing

Alternatives to Natus: Fertility Journal

Looking for apps like Natus: Fertility Journal? Here are 6 similar apps on the App Store. The highest rated is Meal2Motion: Burn Calories (5.0/5), and all 6 are free to download.

Natus: Fertility Journal vs. alternatives
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Natus: Fertility Journal – Free September 17, 2026
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Meal2Motion: Burn Calories 5.0 / 5 (1) Free Jan 26, 2026 Compare
Regl+ : Period & Cycle – Free Oct 19, 2026 Compare
Madre Fertility 5.0 / 5 (2) Free Sep 3, 2026 Compare

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