Ads in a period tracker matter less for what you see on screen than for what runs behind it. Showing ads usually means adding third-party advertising or analytics code to the app, and that code can receive device identifiers and usage events. An ad-free tracker with a "Data Not Collected" label on the App Store removes that layer entirely.
Why ads in a health app are different
Cycle data can reveal pregnancy attempts, sexual activity, health conditions and changes in your routine. Under the GDPR, health data is a special category that needs extra protection.
Ad-supported apps typically include software development kits (SDKs) from ad networks or analytics companies. Even if those SDKs never see a period date, they can learn that you use a period app, when you open it and which screens you visit.
How the business model shapes privacy
An app has to be paid for somehow. The usual options are:
| Model | Who pays | What it can mean for your data |
|---|---|---|
| Ads | Advertisers | Third-party code, identifiers and usage events shared |
| Data partnerships | Partners | Data, sometimes aggregated, shared or sold |
| Subscription or one-off price | You | No need to monetise your data |
A free tier with an optional paid upgrade can work without ads, as long as the paid part covers the costs.
How to check any tracker in five minutes
- Open the app's App Store page and scroll to App Privacy.
- Look for "Data Used to Track You": in a period app, this should be empty.
- Check "Data Linked to You" for health, contact info or identifiers.
- Notice whether the app asks permission to track you across other apps when you open it.
- Search the privacy policy for words such as advertising partners, analytics or third parties.
Reading the App Store privacy label
- Data Used to Track You: linked with data from other companies for ads or shared with data brokers.
- Data Linked to You: collected and tied to your identity, for example through an account.
- Data Not Linked to You: collected, but not tied to your identity.
- Data Not Collected: the developer does not collect any data from the app.
The label is provided by the developer. It is a good first filter, and the privacy policy gives you the detail.
Bloom Private: no ads, no account
Bloom Private shows no ads and includes no third-party analytics. Its App Store label is "Data Not Collected". There is no account and there are no servers: your records stay on your iPhone, protected by iOS encryption, unless you choose to export them or turn on Apple Health.
The free version includes period and cycle tracking, more than 60 symptoms, fertility signs, perimenopause mode, the pill blister, Face ID or Touch ID lock, a basic PDF report, CSV export and an encrypted backup.
Premium adds TTC mode and the full PDF report, with a 7-day free trial on the yearly plan. You can also try our Try our free period calculator without installing anything, or read how Bloom Private handles your data.
Frequently Asked Questions
Ads usually come with third-party code that can receive device identifiers and usage events. In a health app, even knowing that you use it can be sensitive.
Check the App Privacy section on its App Store page. "Data Used to Track You" should be empty, and "Data Not Collected" is the strongest label.
No. Bloom Private has no ads and no third-party analytics, and its App Store label is "Data Not Collected".