ML revenue forecast.
Calibrated against 31551 apps in this category.
Confidence band
±15%
High — many comparable apps with verified data
At a glance
Earns 6.48× more than the category median (147/mo).
Ranks #1,412 of 31,551 in Health & Fitness (top 4.5% by revenue).
Launched Sep 16, 2015 · last updated Aug 04, 2025.
What the app looks like
Live screenshots from the Play Store, captured by our snapshot worker. Tap any image to enlarge.
Bella Period Calendar's revenue trajectory
Forecast revenue from snapshot history. Last 1 months.
Where Bella Period Calendar sits in Health & Fitness
Revenue distribution of 31551 comparable apps. Bella Period Calendar highlighted.
Bella Period Calendar vs comparable apps
Revenue trajectory side-by-side. Bold = Bella Period Calendar, ghosted = peers.
App spec
Version
Varies with device
Last update
Aug 04, 2025
Launched
Sep 16, 2015
Price
Free
Monetization
Free
What Bella Period Calendar actually does (from store listing)
BELLA menstrual calendar:
Do you want to know when your period starts? Or perhaps you need to know when your fertile days start in the coming month? Thanks to this free application you will be able to make a note of your cycle on your smartphone which you carry around with you almost all the time. Ovulation, infertile days or the menstruation itself will not surprise you anymore. The Bella menstrual calendar allows you to update the data, set reminders about, for example, taking the pill or d…
BELLA menstrual calendar:
Do you want to know when your period starts? Or perhaps you need to know when your fertile days start in the coming month? Thanks to this free application you will be able to make a note of your cycle on your smartphone which you carry around with you almost all the time. Ovulation, infertile days or the menstruation itself will not surprise you anymore. The Bella menstrual calendar allows you to update the data, set reminders about, for example, taking the pill or describe the symptoms of the last period. The safety, comfort and convenience of this tool mean that you will never forget about your important days again.
Explore the application’s options and functionalities.
Take control!
The application’s heart is its main screen. It shows you the current day of your menstrual cycle and informs you when your fertile days and period approach. Thanks to the information appearing on the main screen, you will take control and feel much safer.
Your cycle, our support:
The registration option presents a monthly prognosis of your cycle, prognosis for the subsequent months as well as the possibility of previewing the archived entries concerning the previous cycles.
Notes, symptoms and mood!
You will be able to describe every day of your cycle by using your own notes and registering symptoms (e.g. heavy bleeding, stomach pain, headache) and moods (e.g. happy, sad, and sleepy).
The register:
It is the place where all the data related with every cycle (past and forecast) is gathered. The data is divided into past, prognoses and statistics. The past option helps you to analyse how the length of your period has been changing over the last few months. The chronological prognoses indicate when the next period starts and help determining the start dates of your cycles for the next 6 months. The statistics option is a transparent presentation of the most important numbers related to your cycle, which shows you, amongst others, the number of occurring symptoms and moods accompanying your periods as well as the minimum, maximum and average duration of your cycle.
Period prognosis:
You can choose the way in which the application predicts your periods. You can choose between the two following options: the mean values registered during previous cycles calculated on the basis of archived data from the application or the constant values, in which the cycle’s and period’s duration are defined by yourself.
You will not miss an approaching period anymore.
This is thanks to the notification option which can be personalized and adjusted to your needs. Thanks to the notifications you will know when your fertile days, period or ovulation approach. You can also set a notification reminding you to take your pill.
Do you like feeling safe?
Your data likes it, too. That’s why you can save a copy of your data on a safe server. If you replace or lose your smartphone, you will be able to retrieve the up-to-date data regarding your cycle into the newly installed application in a fast and convenient manner.
Comparable Android apps
The five apps in Health & Fitness with the closest revenue to Bella Period Calendar. Click any to see its detail page.
Each forecast combines App Store rating, ratings count, monetisation model, pricing tier, IAP signals and ad-supported flag.
The base estimate is then multiplied by a per-category scaling factor learned from apps with founder-verified MRR.
Every number on this page comes from public APIs and bumetric's own snapshot history.
Full methodology covers input variables, accuracy bands per category and how we treat apps without comparable anchors.
See also the live data on Bella Period Calendar's tracker page for current rating, reviews and snapshot timeline.
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