What it does

Natural Cycles is a digital health app that functions as an FDA-cleared, non-hormonal birth control method. It uses an algorithm to analyze a user's basal body temperature and other cycle data to identify their daily fertility status. The app helps users prevent pregnancy naturally or plan a pregnancy by pinpointing ovulation.

Where it shines

The app's greatest strength is its ability to build trust for a sensitive medical product through its user experience. The onboarding is a long, meticulous quiz (00:07-01:24) that makes the process feel medically rigorous. Instead of a generic loading icon, it features a multi-stage "plan builder" (01:25) that showcases impressive social proof, like its 4.8-star rating and global user base. This transforms wait time into a powerful credibility-building moment.

UX highlights

• Contextual Social Proof: Testimonials are not dumped on one screen. Instead, they appear at relevant moments, like a quote from "Jess" about regular cycles appearing right after the user confirms their own cycle is regular (00:56).
• Educational Framing: Early in the flow, the app presents a clear chart comparing its effectiveness to other birth control methods (00:43). This educates the user and establishes the app's credibility as a serious medical tool.
• Smart Funneling: The app asks about ownership of devices like an Apple Watch or Oura Ring (01:14). This cleverly segments users, leading to a recommendation for the app's own thermometer if no compatible device is owned, integrating a hardware sale into the flow.
• Data Privacy Forefront: A dedicated screen about data control appears very early in the onboarding (00:04), addressing potential user concerns upfront before asking for sensitive information.
• Personalized Reinforcement: Simple screens like "Nice to meet you, Julia!" (00:27) break up the long quiz and add a human, personalized touch to the interaction.

Monetization & growth

The app uses a hard paywall with a free trial offer, which is presented after the user has completed the lengthy onboarding quiz and created an account. By the time the user sees the pricing (02:25), they have invested significant time and provided sensitive data, increasing their likelihood to convert. The paywall offers three options: Annual, Monthly, and a 4-week Trial. The trial is cleverly positioned to lead into a paid plan, and it also requires the purchase of their thermometer for $14.50, ensuring a minimum financial commitment.

Who it’s for

Natural Cycles is primarily for women seeking a non-hormonal, data-driven method of birth control or fertility planning. The app's emphasis on scientific backing and FDA clearance suggests it targets users who are diligent, value accuracy, and are comfortable with daily tracking routines. The hardware integration also appeals to the tech-savvy health consumer who may already use other wearables.

Notes & opportunities

The onboarding flow is exceptionally long. While this builds investment, it could also be a point of significant drop-off for users with lower initial intent. The app could potentially test offering a glimpse of the main interface or a core feature earlier to demonstrate value sooner. Additionally, while the shipping address form (02:38) is clean, it could benefit from auto-filling address details based on ZIP code to reduce friction in the final checkout step.