NaturalBloom

PRIVATE BY DESIGN

Your cycle data never leaves your phone. NaturalBloom is local-only — no account, no cloud sync of your readings, no servers that hold your data, no advertising SDKs, no third-party analytics. Everything you log lives in your phone's secure local storage and stays there. You can export it whenever you want. You can wipe it whenever you want. We never see it. That's not a privacy policy promise — it's an architecture choice.

ONE PURCHASE. NO SUBSCRIPTION.

$19.99, one time, yours forever. No subscription. No ads. No upsells. Every future update to the iPhone app is included. Family Sharing is enabled, so your partner gets it too. If it isn't right for you, our 60-day satisfaction promise routes through hello@naturalbloom.app — we'll endorse your refund request with Apple.

BUILT ON SENSIPLAN

NaturalBloom uses the Sensiplan sympto-thermal protocol — a German-developed natural family planning method validated in multiple peer-reviewed prospective studies. The same three-over-six temperature confirmation rule and peak-mucus cross-check a certified instructor would teach you. Every fertile-window prediction is interrogable — tap "Why this window?" to see exactly which rule fired and on which days.

WHAT YOU CAN TRACK

• Basal body temperature — manual entry, Bluetooth thermometers (Easy@Home, Premom Smart Basal, Femometer Vinca II Pro, A&D UT-201BLE Plus), or wearable temperatures from Apple Watch (Series 8+/Ultra), Tempdrop, Oura Ring, Whoop, Garmin, Fitbit, and Ultrahuman via Apple Health
• Cervical mucus observations (Sensiplan categories)
• Period flow and intermenstrual spotting
• LH (ovulation) test results
• Intimacy
• Free-text notes for symptoms and life events

CALM, CLEAR, NEVER ALARMING

No red dots. No "you're fertile!" push notifications. No fear-based nudges. NaturalBloom explains what your body is doing in plain language — "You ovulated 9 days ago. Your luteal phase typically runs 14 days, so your period is expected May 1." — and lets you read it on your own terms.

WEARABLE-AWARE

If you wear an Apple Watch (Series 8+ or Ultra), Tempdrop, Oura, Whoop, Garmin, Fitbit, or Ultrahuman, NaturalBloom understands the quirks. Wrist temperature is calibrated to your oral baseline before being used as your BBT. Short-sleep nights are flagged as less reliable. A phase-aware explainer reminds you that the luteal-phase HRV dip and resting heart-rate climb are progesterone, not poor recovery.

PERSONALISED, NOT GENERIC

Every cycle, NaturalBloom learns your patterns: average length, ovulation day, luteal phase length, shortest and longest cycles. Daily insights reference your real numbers, not a horoscope. Cross-cycle pattern callouts surface things like consistently faint temperature shifts — descriptive observations worth bringing up with a clinician, never diagnoses.

FOR EVERY GOAL

• Avoiding pregnancy: conservative fertile-window framing, double-confirmation rules, structured "looks unusual?" reasons that set noisy readings aside without losing the audit trail
• Conceiving: peak-fertility highlighting, ovulation confirmation in plain English, triphasic-shift heads-up during the implantation window
• Understanding your body: a Learn tab that compares Sympto-Thermal to Billings, Creighton, Marquette, Standard Days, and LAM — so you can see why we picked Sensiplan and decide whether it fits your method

IMPORTANT

NaturalBloom is an educational tool. It is not a contraceptive, not a medical device, and does not provide medical advice. If you're using fertility awareness to avoid or achieve pregnancy, please learn the method thoroughly — ideally with a certified Sensiplan or sympto-thermal instructor — and talk to a clinician about decisions that affect your health.