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Report updated Apr 27, 2026

Overview · Full Intel report in progress

cycle.log is an established medical app that is completely free. With a 4.5/5 rating from 24 reviews, it shows polarized user reception.

What is cycle.log?

cycle.log is a menstrual cycle tracking application developed by 433 Labs that focuses on simplicity and predictive analytics. The app claims to improve its accuracy over time by calculating average cycle lengths and standard deviations to estimate future period start dates.

Current Momentum

v1.4 · 46mo ago

Zombie

Last updated 1399d ago. 5 versions tracked.

Competition

Rivals identification in progress

7-Day Rank Pulse 🇺🇸

Medical

No ranking data

Rating Pulse 🇺🇸

What makes this app unique?

What Does It Look Like?

What Are The Key Features?

Cycle LoggingStandard

Provides a simplified interface for users to record their menstrual cycle data.

Predictive RemindersStandard

Sends automated notifications to users before their next period is expected to begin.

Adaptive AnalyticsStandard

Automatically adjusts cycle length estimates based on historical user data.

Cycle Variability TrackingStandard

Calculates the standard deviation of cycle lengths to provide insight into cycle consistency.

How much does it cost?

Free

Who Built It?

433 Labs app icon

433 Labs

(14)

Developing specialized iOS utilities for personal health tracking and niche social community engagement.

Portfolio

2

Apps

Paid 1
Social Networking100%

Explore the full 433 Labs report

Portfolio breakdown, audience, momentum, and every app published by 433 Labs.

Go deeper

Analysis in progress, available soon

What do users think recently?

Analysis in progress, available soon

View the full user-sentiment analysis

Mood gauge, ratings & review-volume history, every praise / complaint / request, and sentiment over time.

Go deeper

Analysis in progress, available soon

What is the competitive landscape for cycle.log?

How's The Medical Market?

Market outlook for this category

Available very soon

Strategic analysis coming soon

SWOT, key takeaways & outlook

The outtake for cycle.log

Key Takeaways

cycle.log positions itself as a minimalist, data-driven tracker that uses historical input to refine its period prediction capabilities.

Where Is It Heading?

Trend analysis

Available very soon

Disclosure: Independent intel to help mobile builders succeed.

AI-powered analysis with editorial review, built from publicly available sources. Marlvel.ai is not affiliated with, endorsed by, or sponsored by cycle.log, its developer, the app publisher, Apple, or Google Play. All trademarks, logos, and screenshots referenced remain the property of their respective owners.

Cite this report

Marlvel.ai. “cycle.log Intelligence Report.” Updated Apr 27, 2026. https://marlvel.ai/apps/cycle-log

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