Independent automated assessment · 3 signal sources · 814 reviews scanned · analyzed 2026-10-05.
Period Calendar Period Tracker
Simple Design Ltd.Period Calendar is a period tracker and ovulation tracker in one — predict yo…
4.9 ★4,892,923 ratings
100M+Downloads
4+Age rating
—App size
Free · In-app purchasesIn-app purchases
About this app
Period Calendar is a period tracker and ovulation tracker in one — predict your period, ovulation and fertile window, and track your chance of getting pregnant.
★The rating 4.9★ Popular in 63 Countries. Trusted by 300 million Users.
Keep track of your menstrual cycles with Period Calendar. It tracks your periods, blood flow, cycles, ovulation and the chance of conception. Period tracker helps both women looking to conceive and those trying to birth control.
Period Tracker is useful, whether you have irregular periods or regular periods. It can track your chance of pregnancy every day. You can also record your menstrual flow, cervical mucus, BMI, sexual activity, weight, temperature, symptoms or moods. Think of it as your personal period diary.
⏰PILL REMINDER & PERIOD REMINDER: - Customize the notification text to make it discreet, to avoid never being embarrassed in public.…
Preview
Real screenshots from the store listing.
Independent evidence report
Evidence and review signals
This is where the page changes from an app-store listing into an evidence report: findings, important reviews, pricing and a dated history.
Which version this describes
When we ran this analysis, and what the store lists now.
We cannot tell which version of the app this analysis describes. It was run 2026-10-05 , and the app may have changed since.
The store currently lists version VARY, updated 2026-09-10.
What we measured
Each line is a measurement published as a measurement, never a verdict.
Each line is a measurement, published as a measurement. Where we have not looked, the line says so rather than reading as a zero.
Developer replies to reviews
Replies to at least 1 review in 20
Price in the store description
States no price and billing period
Cancelling, in the store description
Does not say how to cancel
Themes reported by reviewers
No theme reported
Counted from the reviews we have read for this app. "No theme reported" means no theme reached our reporting threshold — it is not a finding that nothing is wrong with this app, and we do not say it is.
Five-star share of ratings
90% or more five-star
Arithmetic on the stores' own published rating counts. It says nothing about why the ratings fall where they do.
In the package we scanned
No package has been scanned for this app, so nothing is published about what it ships. That is an absence of evidence about the app, not a finding about it.
Graded bands · predicate set 1.4 · how these are measured
What the analysis found
App-specific findings, grouped by what each one rests on. How they are graded lives on its own page.
Positive evidence 1
Things this app does right, published at the same strengths as the catch list.
Developer says data deletion can be requested
The developer's data-safety disclosure on the store states that users can request deletion of their data, or the app's own text offers a way to delete the account. This restates what the developer declares; it is not a test of whether deletion works. Apple publishes no equivalent disclosure, so on an Apple-only listing only the app's own text can support it.
What we saw: The developer's store data-safety disclosure states that data deletion can be requested; we have not seen a deletion control in the app's own text
Assessment & version history
App changes and Appworthy events in one timeline.
What this app sells
Useful store-disclosed pricing, kept below the app listing.
Items shown0
Lowest—
Highest—
Google Play does not publish per-purchase prices.