Bella Blooms
A cycle tracker for you, no one else.

Know where you are in your cycle.

Bella Blooms is for anyone who wants to understand their cycle without handing their data to a company. You log one temperature each morning. It shows your phase, confirms ovulation from your own temperature shift, and tells you what that means for today.

Buy Bella Blooms
One payment. No account. Nothing leaves your phone.
The Home screen: a phase-aware greeting, your cycle phase and days to the next period, then what to eat and how to train today.
Your day, by phase
A temperature chart across several cycles, shaded by phase, with the rise after each ovulation clearly visible.
Ovulation shows in your own curve
A month calendar with period days tinted and a dot on every day a temperature was logged.
A calendar you can correct

Temperature, not day-counting

Ovulation is confirmed by the rise in your morning temperature, so it still works when your cycle isn't regular.

Private by design

Your entries are stored on your phone and nowhere else. There is no account, no cloud copy and no advertising. See exactly what is stored.

Works offline, like an app

Add it to your home screen and it opens full screen and runs without a connection. Nothing to download from an app store.

You'll need a basal body thermometer
A regular thermometer isn't precise enough. Reading your cycle needs about 0.05°C / 0.1°F resolution to catch the shift that confirms ovulation. Any pharmacy, around $10. It's the only physical thing you need.
What it is not
Bella Blooms is not a medical device and not contraception. It won't replace your doctor, but it may make it easier to talk to one.
One payment

Buy it once, keep it.

€19

No subscription and no account. Checkout shows the exact total in your currency, including any tax. After you pay you get a key that unlocks Bella Blooms on your phone.

If it isn't for you, ask within 14 days and you get your money back, no questions. See the refund policy and the terms.

Payment is handled by Paddle, our payment provider. Your cycle data never goes near it.
Already bought it? Get your key again.

Get it onto your phone

Six steps, done once. Do them in this order.

1
Buy it
Press Buy Bella Blooms and pay in the window that opens. When it goes through you land on a page that shows your key.
2
Copy and save your key
Press Copy key, then paste it into your notes app or password manager. You can also download the key as a file or email it to yourself from the same page. You'll need it in step 4. If you lose it, the key recovery page gives it back with your email and invoice reference.
The page shown after payment: "Here is your key", the key itself, buttons to copy it, download it as a file or email it to yourself, and the invoice reference.
A sample key, so it won't unlock anything. Yours will be different.
3
Add Bella Blooms to your home screen
Open bellablooms.app/download in the browser named below, not inside another app, then:
iPhone

Safari

  1. Open the page in Safari.
  2. Tap the Share button (a square with an arrow pointing up).
  3. Scroll down if you need to and tap Add to Home Screen.
  4. If you see Open as Web App, leave it switched on. Then tap Add.
Safari's Share sheet on an iPhone: a row of apps at the top, then a list of actions with Add to Home Screen near the bottom of the first group.
The Share sheet. Add to Home Screen is in the list of actions.
The Add to Home Screen screen: the name Bella Blooms, the address, an Open as Web App switch turned on, and an Add button at the top right.
The Add screen. Leave Open as Web App on, then tap Add.

Firefox (iOS 16.4 or later)

  1. Open the page in Firefox.
  2. Tap the menu, then Share.
  3. Scroll down and tap Add to Home Screen, then Add.

On an iPhone the home-screen app keeps its own storage, separate from the browser you added it from. That's why you paste the key again in step 4.

Android

Chrome

  1. Open the page in Chrome.
  2. Tap Install app in the banner at the top of the page. If you don't see it, tap the menu (three dots), then Install app.
  3. Tap Install.
The Bella Blooms page in Chrome on Android, with an Install Bella Blooms banner and an Install app link at the top.
The banner at the top of the page. Tap Install app.
Chrome's Install app question, showing the Bella Blooms icon and name with Cancel and Install buttons.
Chrome asks once more. Tap Install.

Firefox

  1. Open the page in Firefox.
  2. Tap the menu (three dots).
  3. Tap Add app to Home screen, not Add to shortcuts. Then tap Add.
Firefox's menu on an Android phone, with Add app to Home screen near the bottom of the list, just below Add to shortcuts.
Firefox's menu. Choose Add app to Home screen.
The Add to Home screen question, showing the Bella Blooms icon with Cancel and Add buttons.
The Add screen. Tap Add.
4
Open it from the home screen and paste your key
Tap the Bella Blooms icon. Press Paste from clipboard (or paste the key into the box yourself) and press Unlock. You only do this once on each device.
The Bella Blooms lock screen, "Unlock Bella Blooms", with a Paste from clipboard button and a key pasted into the box above the Unlock button.
5
Answer the setup questions
A couple of minutes: your name, °C or °F, your usual cycle and period length, and when your last period started. Then an optional daily reminder that goes into your own calendar.
The first setup screen: your name, temperature unit, average cycle and period length, and when your last period started.
6
Take your first temperature tomorrow morning
Right when you wake, before sitting up, talking or checking your phone. The same time each day matters more than the exact time.
The morning screen: "Good morning", a large temperature reading with plus and minus buttons, and a "Log & see my day" button.

Stuck on any step? The help page covers the usual snags.

After that, it's one thing

·
Log your temperature, see your day
A phase-aware greeting, plus what to eat, how hard to train and what your body could use more of today.
·
Tap once when your period starts
That's the only other input. Your phase and predictions are worked out from there.
·
It sharpens over time
Your first cycle is mostly Bella Blooms learning your rhythm. By the second, it's confirming ovulation from your real temperature shift, not a guess.
Buy Bella Blooms
One payment. Yours to keep.
Made with care.
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