NaturalBloom turns the signs your body already gives you into a clear, trustworthy fertile window — using the same evidence-based method clinicians teach, right on your phone.
No calendar guessing, no algorithm you can't see into. Just the sympto-thermal method, applied carefully.
Temperature and cervical mucus take seconds — or let a thermometer, Apple Watch, or ring record the temperature for you while you sleep.
NaturalBloom applies the sympto-thermal rules per Sensiplan — two independent signals that cross-check each other, not a single guess.
See your fertile window with a confidence score and the reasoning behind every call. Nothing is hidden, and nothing is left to a black box.
Fertility data is among the most sensitive there is. NaturalBloom is built so that it simply never leaves your device — not as a setting you toggle, but as the architecture.
There's no account to create and nothing to log into.
Powerful where it counts, calm everywhere else.
The 3-over-6 thermal shift, peak-mucus day, and a conservative cross-check that keeps your fertile window open until both signs agree.
Tap any day to read the reasoning in plain language. Disagree with the engine from a position of knowledge, not blind trust.
Type it in, or sync from a Bluetooth thermometer, Tempdrop, Apple Watch wrist temp, or an Oura / Whoop ring. Hand-typed values are always protected.
On iPhone: two-way Apple Health sync, a home-screen widget, and an Apple Watch complication that show your status at a glance — discreetly, if you prefer.
Switching trackers? Import from Natural Cycles, Kindara, Fertility Friend, Oura, and Apple Health — auto-detected, with fill-blanks or overwrite modes.
Cycle-over-cycle patterns and gentle observations — surfaced only when there's something real to say. No nagging, no streaks, no dark patterns.
Share a live, read-only dashboard with your partner through your own iCloud — they see today's status and what's coming, never your raw logs.
Turn any date range into a clean PDF report — with an at-a-glance summary of your temperatures and signs — built on your device and shared by email or print.
Browse any past cycle's temperature chart and every day you logged. Your history stays yours to revisit, export as CSV, or back up as a portable file.
Use every feature free for 14 days. Keep it forever with a single $19.99 purchase — no subscription, and the trial never auto-charges you.
Billed by Apple or Google. Refunds are reviewed by the store you bought from.
No. NaturalBloom is an educational charting tool that records and interprets the fertility signs your body already produces. It is not a contraceptive or a medical device, and it doesn't provide medical advice. If you're using fertility awareness to avoid or achieve pregnancy, learn the method thoroughly — ideally with a certified instructor.
No. A basic basal body thermometer and a couple of minutes each morning are enough. If you'd like, you can also connect a Bluetooth thermometer, Tempdrop, an Apple Watch, or an Oura / Whoop / Garmin / Fitbit ring for hands-off temperature readings.
Entirely on your phone. There's no account and no server holding your cycle data. NaturalBloom doesn't ship advertising or analytics SDKs — its App Store privacy label is “Data Not Collected.” You can export or delete everything at any time.
Yes. NaturalBloom is free to use for 14 days — the complete app, no card required. After the trial, a one-time $19.99 purchase unlocks it permanently. There's no subscription, and the trial never auto-charges you.
Yes — after your 14-day free trial, it's $19.99 once. No subscription, no upsells, no in-app tiers. On iPhone, Family Sharing is on, so a partner gets the app at no extra cost — and every future update is included.
Yes — NaturalBloom is on Google Play. The Android app has the same Sensiplan engine, manual and Bluetooth-thermometer temperature logging, and the same one-time purchase. Apple Health, Apple Watch, and widget integrations remain iPhone features. There's no web version — your data stays on your phone.
Learn what your body is telling you — and finally have an app that explains itself. Now on iPhone and Android.