A range, not a deadline
Period estimates appear as a most-likely range and a wider possible range. More variation widens the answer instead of hiding behind one confident date.
COMPARE · FROM APPLE’S OWN PRIVACY LABELS
Read the labelbefore you log a period.
Every App Store listing carries a privacy label that the developer fills in. We read the labels of 7 well-known cycle apps on 5 October 2026 and drew them side by side—one dot for each of Apple’s fourteen data categories. Mama Bloom’s row is the empty one.
- 6 of 7
- declare Health & Fitness data as linked to you
- 6 of 7
- declare some data as used to track you
- 0 of 14
- categories declared by Mama Bloom: Data Not Collected
THE LABELS, DRAWN
Fourteen categories. Eight apps.
Each dot is one category on the developer’s own label. A filled coral dot means the developer says that data may be used to track you across other companies’ apps and websites. Each app name opens its listing so you can check it yourself.
| App | Health & Fitness | Sensitive Info | Location | Contact Info | Contacts | Identifiers | Usage Data | Purchases | Financial Info | Search History | Browsing History | User Content | Diagnostics | Other Data | Declared |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mama BloomData Not Collected | Health & Fitness: Not declared | Sensitive Info: Not declared | Location: Not declared | Contact Info: Not declared | Contacts: Not declared | Identifiers: Not declared | Usage Data: Not declared | Purchases: Not declared | Financial Info: Not declared | Search History: Not declared | Browsing History: Not declared | User Content: Not declared | Diagnostics: Not declared | Other Data: Not declared | 0 |
| Flo | Health & Fitness: Linked to you | Sensitive Info: Linked to you | Location: Used to track you | Contact Info: Linked to you | Contacts: Not declared | Identifiers: Used to track you | Usage Data: Used to track you | Purchases: Used to track you | Financial Info: Not declared | Search History: Linked to you | Browsing History: Not declared | User Content: Linked to you | Diagnostics: Linked to you | Other Data: Not declared | 10 |
| Clue | Health & Fitness: Linked to you | Sensitive Info: Linked to you | Location: Linked to you | Contact Info: Linked to you | Contacts: Not declared | Identifiers: Used to track you | Usage Data: Linked to you | Purchases: Not declared | Financial Info: Not declared | Search History: Not declared | Browsing History: Not declared | User Content: Linked to you | Diagnostics: Not linked to you | Other Data: Not declared | 8 |
| Natural Cycles | Health & Fitness: Linked to you | Sensitive Info: Linked to you | Location: Not declared | Contact Info: Used to track you | Contacts: Not declared | Identifiers: Linked to you | Usage Data: Linked to you | Purchases: Linked to you | Financial Info: Not declared | Search History: Not declared | Browsing History: Not declared | User Content: Not declared | Diagnostics: Linked to you | Other Data: Not declared | 7 |
| Ovia | Health & Fitness: Linked to you | Sensitive Info: Linked to you | Location: Linked to you | Contact Info: Linked to you | Contacts: Not declared | Identifiers: Linked to you | Usage Data: Linked to you | Purchases: Not declared | Financial Info: Linked to you | Search History: Linked to you | Browsing History: Not declared | User Content: Linked to you | Diagnostics: Linked to you | Other Data: Not declared | 10 |
| Glow | Health & Fitness: Linked to you | Sensitive Info: Linked to you | Location: Used to track you | Contact Info: Used to track you | Contacts: Not declared | Identifiers: Used to track you | Usage Data: Used to track you | Purchases: Used to track you | Financial Info: Not declared | Search History: Linked to you | Browsing History: Not declared | User Content: Linked to you | Diagnostics: Linked to you | Other Data: Not declared | 10 |
| Period Calendar | Health & Fitness: Linked to you | Sensitive Info: Linked to you | Location: Not declared | Contact Info: Linked to you | Contacts: Not declared | Identifiers: Used to track you | Usage Data: Used to track you | Purchases: Not declared | Financial Info: Not declared | Search History: Not declared | Browsing History: Not declared | User Content: Not linked to you | Diagnostics: Not linked to you | Other Data: Not declared | 7 |
| Stardust | Health & Fitness: Not linked to you | Sensitive Info: Not declared | Location: Not declared | Contact Info: Not declared | Contacts: Not declared | Identifiers: Used to track you | Usage Data: Used to track you | Purchases: Used to track you | Financial Info: Not declared | Search History: Not declared | Browsing History: Not declared | User Content: Not declared | Diagnostics: Not declared | Other Data: Not declared | 4 |
- Used to track you
- Linked to you
- Not linked to you
- Not declared
As each developer declares it on its App Store listing · United States storefront · captured 5 October 2026. Labels are self-reported and can change.
READ THIS BEFORE THE DOTS
What a label can and cannot tell you.
It is the developer’s own declaration. Each listing says the information “has not been verified by Apple”—that is true of Mama Bloom’s label too. The labels here are quoted as published, not audited by Mama Bloom.
It lists what may be collected, and why. A category on a label does not mean data was sold, shared improperly or exposed. Purposes such as app functionality, analytics or advertising are listed on each listing.
It is a snapshot. These labels were read on the United States App Store on 5 October 2026, for the versions current that day. Developers can change them at any time; follow each app name to see today’s label.
It is not a ranking of quality or accuracy. Mama Bloom makes no claim to forecast more accurately than any other app. Its estimates can be wrong and are never 100% accurate.
BEYOND THE LABEL
What “Data Not Collected” looks like in daily use.
Every estimate has a receipt
Open the evidence receipt to see which recorded starts and intervals formed the range, what was excluded and which method version produced it.
No account to make
There is no Mama Bloom sign-up. The record lives in protected app storage on your iPhone, and the calculations run there too.
Bring your history with you
Move your record in from Apple Health or a CSV file you exported elsewhere. Mama Bloom shows what a file would add before anything is placed.
Leave whenever you like
Export your record or delete it in one deliberate step. Core logging, history, ranges, export and deletion never sit behind the subscription.
Discreet by default
App lock, an app-switcher shield, widgets that begin with only “Open Mama Bloom”, and reminders with discreet wording unless you choose otherwise.
AN HONEST COMPARISON HAS TWO SIDES
When another app may suit you better.
You want ovulation days, a fertile window or help planning conception.
Mama Bloom deliberately shows none of these. Look for an app designed and regulated for that purpose.
You need a method of contraception.
Mama Bloom is not a contraception method. Use one your clinician recommends, or a product cleared for that use.
You use Android, or want to log from a web browser.
Mama Bloom runs only on iPhone and Apple Watch.
You want a community, a partner view or cloud access from many devices.
Mama Bloom has no social features or shared account by design; its optional backup is your own encrypted iCloud copy.
SWITCHING IS ONE FILE
Keep your history.
Leave the label behind.
Export a CSV from the app you use today, or share your cycle history through Apple Health. Mama Bloom shows exactly what it would add before anything is placed—and importing the same file twice never doubles a day.
iPhone and Apple Watch · iOS 17+ · watchOS 10+ · free download, optional Private Edition