At a glance
- Latest version
- v2.0.3 (2000017)
- Updated
- Jun 7, 2026 (4 months ago)
- APK size
- 30.4 MB
- Requires
- Android 5.0+ (API 21)
- CPU support
- x86 32-bit, x86 64-bit, ARM 32-bit, ARM 64-bit
- Category
- Health & Fitness (app)
- Listed since
- Oct 26, 2022 (at least)
- Permissions
- 33
- Website
- a100.com.pl
- Developer contact
- [email protected]
- Privacy
- Developer's privacy policy
About this APK
Bella Period Calendar is an app by 3xW in the Health & Fitness category, listed since at least October 2022. It includes native code for x86 32-bit, x86 64-bit, ARM 32-bit and ARM 64-bit, so it runs on practically every phone.
It asks for 33 permissions, none of them sensitive. Compared with version 1.9.0, it adds 10 new permissions (“Access adservices ad id”, “Access adservices attribution”, “Advertising ID” and 7 more) and drops 4 (“Read shared storage”, “Read phone status and identity”, “Run at startup” and “Modify shared storage”). The app can read the advertising ID that ad and analytics services use.
What's new in v2.0.3
data storage fix
Description
From the listing uploaded by “appupdater”.
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.
Version history
2 versions are listed, going back to v1.9.0.
Security & authenticity
Security rating: Trusted
Signing certificate
- Signature matches the Google Play version Checked by the source store on Jun 7, 2026.
- Certificate issued to “Agencja Interaktywna 3xW” This is the certificate of the Google Play version.
- Same certificate as the other version checked
Store checks and file details
- Developer signature verified Jun 7, 2026
- Validated against Google Play Jun 7, 2026
- Signed byCN=Dorota Uniewska, OU=Agencja Interaktywna 3xW, O=Agencja Interaktywna 3xW, L=Torun, ST=kujawsko-pomorskie, C=PL
- Signing certificate (SHA-1)2E:89:8C:45:DE:7D:1C:C0:8B:BB:CA:FD:B9:C5:6F:E0:15:1B:A6:1B
- File MD5149c0ba32bdea6b8d164e5313ce7f41e
- Uploaded by “appupdater” Gold tier · 117,810 followers · uploading since 2020
Scans and ratings come from the source store; the certificate comparisons are AAPKs's own, made from the files' published signatures (1 other version compared). AAPKs doesn't scan files itself — compare the MD5 and signer after downloading.
Permissions (33)
Bella Period Calendar requests 33 permissions, none of them sensitive.
- Access adservices ad id android.permission.ACCESS_ADSERVICES_AD_ID
- Access adservices attribution android.permission.ACCESS_ADSERVICES_ATTRIBUTION
- Access fingerprint manager (custom) com.fingerprints.service.ACCESS_FINGERPRINT_MANAGER
- Advertising ID com.google.android.gms.permission.AD_ID
- Badge read (custom) com.sec.android.provider.badge.permission.READ
- Badge write (custom) com.sec.android.provider.badge.permission.WRITE
- Badger badge count read (custom) me.everything.badger.permission.BADGE_COUNT_READ
- Badger badge count write (custom) me.everything.badger.permission.BADGE_COUNT_WRITE
- Context write use app feature survey (custom) com.samsung.android.providers.context.permission.WRITE_USE_APP_FEATURE_SURVEY
- Full network access android.permission.INTERNET
- Google Play install referrer com.google.android.finsky.permission.BIND_GET_INSTALL_REFERRER_SERVICE
- Home broadcast badge (custom) com.sonyericsson.home.permission.BROADCAST_BADGE
- Home provider insert badge (custom) com.sonymobile.home.permission.PROVIDER_INSERT_BADGE
- Internal broadcast protection (app-defined) pl.bella.kalendarzyk.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
- Launcher change badge (custom) com.huawei.android.launcher.permission.CHANGE_BADGE
- Launcher read settings (custom) com.htc.launcher.permission.READ_SETTINGS
- Launcher read settings (custom) com.huawei.android.launcher.permission.READ_SETTINGS
- Launcher read settings (custom) com.oppo.launcher.permission.READ_SETTINGS
- Launcher update badge (custom) com.majeur.launcher.permission.UPDATE_BADGE
- Launcher update count (custom) com.anddoes.launcher.permission.UPDATE_COUNT
- Launcher update shortcut (custom) com.htc.launcher.permission.UPDATE_SHORTCUT
- Launcher write settings (custom) com.huawei.android.launcher.permission.WRITE_SETTINGS
- Launcher write settings (custom) com.oppo.launcher.permission.WRITE_SETTINGS
- Prevent the device from sleeping android.permission.WAKE_LOCK
- Read Google service settings com.google.android.providers.gsf.permission.READ_GSERVICES
- Read app badge android.permission.READ_APP_BADGE
- Receive push notifications com.google.android.c2dm.permission.RECEIVE
- Schedule exact alarms android.permission.SCHEDULE_EXACT_ALARM
- Show notifications android.permission.POST_NOTIFICATIONS
- Use biometric hardware android.permission.USE_BIOMETRIC
- Use exact alarm android.permission.USE_EXACT_ALARM
- Use fingerprint hardware android.permission.USE_FINGERPRINT
- View network connections android.permission.ACCESS_NETWORK_STATE
Required hardware & features
- Basic touch input android.hardware.faketouch
Bella Period Calendar APK: questions and answers
Can I install this APK over the version I already have?
Yes, if your installed copy is older. It is signed like the Google Play version, so Android installs it as an update and keeps your data.
Is the Bella Period Calendar APK safe?
No one can promise that a file is safe, but some things can be checked. The source store rates this file Trusted. Its signature matches the Google Play version. It is signed with the same certificate as the other version checked. After downloading, check that the file's MD5 is 149c0ba32bdea6b8d164e5313ce7f41e.
