Pinpoint ovulation.
Protect your privacy.
When you're trying to conceive or avoiding pregnancy, precision is everything. Bloom combines intelligent algorithm predictions with absolute data sovereignty. Track your fertile window locally, so your journey stays yours alone.
Everything you need to map your fertility.
Log the symptoms that matter most to accurately identify your entire fertile window.
BBT Logging
Track your Basal Body Temperature daily to confirm exactly when ovulation has successfully occurred.
Cervical Mucus Tracking
Log daily changes to identify the beginning of your fertile window, long before temperature shifts.
Smart Predictions
Bloom's algorithm learns your unique cycle lengths to accurately forecast your next fertile window and period start.
Fertility tracking without the spying.
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Local-First Architecture
Your BBT, symptom logs, and intimate health data live on your physical smartphone, not on a central server.
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No Third-Party Ad Brokers
Many "free" fertility apps sell your TTC (Trying To Conceive) status to ad networks. Bloom's business model is completely ad-free.
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Instant Export & Deletion
You own your biological data. Export it for your doctor or wipe it completely with one tap—no questions asked.
Complete Sovereignty
We built Bloom because we believe your fertility journey is no one else's business.
"Bloom helped me pinpoint exactly when I was ovulating after struggling with irregular cycles for years. The Partner Sync feature was amazing—my husband knew exactly when we were in our fertile window without me having to say a word."
Fertility Tracking FAQ
How does Bloom predict ovulation?
Bloom uses a sophisticated algorithm that learns from the cycle data you log, including your period start and end dates, basal body temperature (BBT) shifts, and cervical mucus tracking, to accurately forecast your unique fertile window.
Is Bloom safe to use if I'm trying to avoid pregnancy?
While Bloom is an excellent tool for understanding your fertile window through the Fertility Awareness Method (FAM), it is an informational tool, not a medical device. It should never be used as a primary or sole form of birth control or contraception.
Can I share my fertility data with my partner?
Yes. If you opt-in to the Partner Sync feature, you can securely share your cycle phase, including your fertile window, directly with your partner's Bloom dashboard to help coordinate.
Understand your body's rhythm.
Download Bloom today and start accurately tracking your fertility with total privacy.
Download the Bloom App