Phone

21 Days

Lifestyle • Kati & Lima • ⭐ 4.71 • 5,000,000+

21 days to introduce life changing habits in your life.

Version 6.16.1 38.9 MB

Screenshots

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Permissions Explained 25 permissions requested View details

This app requests 25 permissions. The table below explains what each permission may allow and what users should review before installing.

Status	Permission	What it means	Why it may be used	User safety note
ℹ️ Review	Vending Billing com.android.vending.BILLING	This is an Android permission or app-specific permission requested by the app.	The app may use this permission for features related to its category, device support, background behavior, storage, connectivity, or system integration.	Review this permission before installing, especially if it does not match the app’s expected purpose.
✅ Common	Internet access android.permission.INTERNET	Allows the app to open network connections and communicate with online services.	Commonly used for streaming, syncing, login, ads, analytics, downloads, cloud features, and app updates.	Common permission. Review the app’s behavior if it does not appear to need online access.
ℹ️ Review	Receive Boot Completed android.permission.RECEIVE_BOOT_COMPLETED	This is an Android permission or app-specific permission requested by the app.	The app may use this permission for features related to its category, device support, background behavior, storage, connectivity, or system integration.	Review this permission before installing, especially if it does not match the app’s expected purpose.
⚠️ Sensitive	Read external storage android.permission.READ_EXTERNAL_STORAGE	Allows the app to read files from shared device storage.	Used by media players, file managers, backup apps, editors, upload tools, and document apps.	Sensitive permission. Review carefully if the app does not need access to files or media.
⚠️ Sensitive	Modify external storage android.permission.WRITE_EXTERNAL_STORAGE	Allows the app to write or modify files in shared device storage.	Used for saving downloads, media files, exports, edited documents, backups, or cached content.	Sensitive permission. Make sure file access matches the app’s purpose.
ℹ️ Review	Read Media Images android.permission.READ_MEDIA_IMAGES	This is an Android permission or app-specific permission requested by the app.	The app may use this permission for features related to its category, device support, background behavior, storage, connectivity, or system integration.	Review this permission before installing, especially if it does not match the app’s expected purpose.
ℹ️ Review	Read Media Video android.permission.READ_MEDIA_VIDEO	This is an Android permission or app-specific permission requested by the app.	The app may use this permission for features related to its category, device support, background behavior, storage, connectivity, or system integration.	Review this permission before installing, especially if it does not match the app’s expected purpose.
ℹ️ Review	Read Media Audio android.permission.READ_MEDIA_AUDIO	This is an Android permission or app-specific permission requested by the app.	The app may use this permission for features related to its category, device support, background behavior, storage, connectivity, or system integration.	Review this permission before installing, especially if it does not match the app’s expected purpose.
ℹ️ Review	Send notifications android.permission.POST_NOTIFICATIONS	Allows the app to send notifications to the device.	Used for alerts, reminders, messages, account activity, updates, or media controls.	Review notification settings if the app sends too many alerts.
ℹ️ Review	Schedule Exact Alarm android.permission.SCHEDULE_EXACT_ALARM	This is an Android permission or app-specific permission requested by the app.	The app may use this permission for features related to its category, device support, background behavior, storage, connectivity, or system integration.	Review this permission before installing, especially if it does not match the app’s expected purpose.
ℹ️ Review	Use Exact Alarm android.permission.USE_EXACT_ALARM	This is an Android permission or app-specific permission requested by the app.	The app may use this permission for features related to its category, device support, background behavior, storage, connectivity, or system integration.	Review this permission before installing, especially if it does not match the app’s expected purpose.
ℹ️ Review	Keep device awake android.permission.WAKE_LOCK	Allows the app to prevent the device from sleeping while a task is running.	Used for media playback, downloads, navigation, alarms, calls, or long-running background tasks.	Review battery usage if the app keeps the device awake too often.
✅ Common	View network status android.permission.ACCESS_NETWORK_STATE	Allows the app to check whether the device is connected to Wi-Fi, mobile data, or another network.	Often used to avoid loading content when offline or to adjust loading based on connection quality.	Generally low risk by itself.
✅ Common	Vibration control android.permission.VIBRATE	Allows the app to control device vibration.	Used for notifications, alerts, haptic feedback, timers, alarms, or game feedback.	Generally low risk by itself.
ℹ️ Review	Use Full Screen Intent android.permission.USE_FULL_SCREEN_INTENT	This is an Android permission or app-specific permission requested by the app.	The app may use this permission for features related to its category, device support, background behavior, storage, connectivity, or system integration.	Review this permission before installing, especially if it does not match the app’s expected purpose.
ℹ️ Review	Gms Permission Ad Id com.google.android.gms.permission.AD_ID	This is an Android permission or app-specific permission requested by the app.	The app may use this permission for features related to its category, device support, background behavior, storage, connectivity, or system integration.	Review this permission before installing, especially if it does not match the app’s expected purpose.
ℹ️ Review	Access Adservices Ad Id android.permission.ACCESS_ADSERVICES_AD_ID	This is an Android permission or app-specific permission requested by the app.	The app may use this permission for features related to its category, device support, background behavior, storage, connectivity, or system integration.	Review this permission before installing, especially if it does not match the app’s expected purpose.
ℹ️ Review	Access Adservices Attribution android.permission.ACCESS_ADSERVICES_ATTRIBUTION	This is an Android permission or app-specific permission requested by the app.	The app may use this permission for features related to its category, device support, background behavior, storage, connectivity, or system integration.	Review this permission before installing, especially if it does not match the app’s expected purpose.
ℹ️ Review	Access Adservices Topics android.permission.ACCESS_ADSERVICES_TOPICS	This is an Android permission or app-specific permission requested by the app.	The app may use this permission for features related to its category, device support, background behavior, storage, connectivity, or system integration.	Review this permission before installing, especially if it does not match the app’s expected purpose.
ℹ️ Review	C2dm Permission Receive com.google.android.c2dm.permission.RECEIVE	This is an Android permission or app-specific permission requested by the app.	The app may use this permission for features related to its category, device support, background behavior, storage, connectivity, or system integration.	Review this permission before installing, especially if it does not match the app’s expected purpose.
ℹ️ Review	Com Applovin Array Apphub Permission Bind Apphub Service com.applovin.array.apphub.permission.BIND_APPHUB_SERVICE	This is an Android permission or app-specific permission requested by the app.	The app may use this permission for features related to its category, device support, background behavior, storage, connectivity, or system integration.	Review this permission before installing, especially if it does not match the app’s expected purpose.
ℹ️ Review	Access Wifi State android.permission.ACCESS_WIFI_STATE	This is an Android permission or app-specific permission requested by the app.	The app may use this permission for features related to its category, device support, background behavior, storage, connectivity, or system integration.	Review this permission before installing, especially if it does not match the app’s expected purpose.
ℹ️ Review	Finsky Permission Bind Get Install Referrer Service com.google.android.finsky.permission.BIND_GET_INSTALL_REFERRER_SERVICE	This is an Android permission or app-specific permission requested by the app.	The app may use this permission for features related to its category, device support, background behavior, storage, connectivity, or system integration.	Review this permission before installing, especially if it does not match the app’s expected purpose.
ℹ️ Review	Foreground Service android.permission.FOREGROUND_SERVICE	This is an Android permission or app-specific permission requested by the app.	The app may use this permission for features related to its category, device support, background behavior, storage, connectivity, or system integration.	Review this permission before installing, especially if it does not match the app’s expected purpose.
ℹ️ Review	Com Limatech Dayschallenge Dayschallenge Dynamic Receiver Not Exported Permission com.limatech.dayschallenge.dayschallenge.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION	This is an Android permission or app-specific permission requested by the app.	The app may use this permission for features related to its category, device support, background behavior, storage, connectivity, or system integration.	Review this permission before installing, especially if it does not match the app’s expected purpose.

About 21 Days

21 days to introduce life changing habits in your life.

What 21 Days Is Used For

21 Days appears to be a lifestyle app focused on building habits over a 21-day period. Based on the title and short description, it may be used as a guided challenge tool for people who want to establish routines, track daily progress, or stay consistent with a personal goal. It is a phone app, so it likely fits everyday use where a user checks in regularly and follows a simple habit plan on the device they carry most often.

The permissions suggest the app can use notifications, alarms, and boot-complete behavior, which may support reminders and scheduled check-ins for habit practice. Internet access and billing-related permissions indicate it may connect to online services and may include optional paid features, while storage and media permissions suggest it may allow saving or accessing user content tied to the app experience. Based on the metadata, it is most relevant for users looking for a structured, time-based self-improvement app rather than a general productivity tool.

Common uses

Track a 21-day habit challenge or routine
Set reminder-based check-ins and daily prompts
Follow a short-term self-improvement plan on a phone
Monitor progress across consecutive days
Use scheduled alerts to stay consistent with goals
Possibly save or access media related to app activities

Best for:

habit tracking daily routines self-improvement phone app goal setting

Related tags

App Details

Package:
com.limatech.dayschallenge.dayschallenge

Category:
Lifestyle

Developer:
Kati & Lima

Version:
6.16.1

Contains Ads:
No

In-App Purchases:
No

Official Listing

Package name: com.limatech.dayschallenge.dayschallenge

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How to Download 21 Days

If this app is not hosted directly on APKApps official link, then for the safest and most up-to-date version, install it from its official Google Play listing.