v1.0
Foundational Ovulation Calculator
Introduced last-period-date input, 28-day cycle defaults, ovulation estimation, basic fertile window dates, and a clear educational disclaimer.
Project Background
Built for private preconception planning, not data extraction.
ConceiveApp Pro was built by reproductive health researchers and software engineers to provide couples and individuals with a private, paywall-free fertility tracking studio following public ACOG-aligned preconception protocols. The project translates cycle physiology into clear ovulation, fertile window, implantation, and due date estimates without forcing accounts or monetizing sensitive reproductive patterns.
Core Principles
100% client-side calculation
Cycle dates are processed by JavaScript inside the browser.
Zero reproductive data tracking
No mandatory accounts, cycle-cloud sync, or reproductive data monetization.
Physiological accuracy
Models account for luteal phase length, sperm survival, oocyte viability, and implantation timing.
ConceiveApp Pro vs Commercial Fertility Apps
| Privacy and access feature | ConceiveApp Pro | Many commercial fertility apps |
|---|---|---|
| Mandatory account | No mandatory account | Often required for full use |
| Sensitive cycle data sharing | No selling sensitive cycle data to third parties | Business models may involve analytics or advertising partners |
| Luteal phase modeling | Customizable luteal phase | Often simplified or locked to defaults |
| Subscription walls | Zero subscription paywalls | Advanced tools may require paid plans |
Version History and Changelog
v1.5
Preconception Timeline Expansion
Added implantation timing, hCG testing windows, and improved explanations for luteal phase variability and cycle irregularity.
v1.8
Privacy and Export Layer
Added local-only settings, downloadable summaries, and a stronger reproductive health privacy architecture.
v2.0 PRO
Clinical Fertility Studio
Launched the 5-in-1 workspace with the 6-month heatmap, luteal phase controls, BBT guide, due date milestones, and browser-only export and copy tools.