Call Defender

Get Call Defender now and be free of annoying spam calls!

Studio KUMA · com.studiokuma.callfilter

4.2 out of 5 (6 ratings) 1M+ downloads v7.8.0.3 21.8 MB Android 4.2+ PEGI 3 · Everyone

Download APK 21.8 MB All versions

Signature matches the Google Play version Details

At a glance

Latest version: v7.8.0.3 (78030000)
Updated: Jun 25, 2026 (3 months ago)
APK size: 21.8 MB
Requires: Android 4.2+ (API 17)
CPU support: x86 32-bit, x86 64-bit, ARM 32-bit, ARM 64-bit
Category: Communication (app)
Listed since: Mar 14, 2021 (at least)
Permissions: 29 (10 sensitive)
Developer contact: [email protected]
Privacy: Developer's privacy policy

About this APK

Call Defender is an app by Studio KUMA in the Communication category, listed since at least March 2021. 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 29 permissions, 10 of them sensitive, including read contacts, read call log and call phone. The app offers in-app purchases through Google Play.

Ratings

4.2out of 56 ratings

5 ★50%
4 ★17%
3 ★33%
2 ★0%
1 ★0%

Ratings from users of the source store — not collected or verified by AAPKs.

What's new in v7.8.0.3

Several improvements and bug fixes.

Description

From the listing uploaded by “appupdater”.

Notice: About Foreground Service Alert According to Google’s Android Oreo policy, we are obligated to show the service status in the notification channel when the service is running in the background. You can go to settings to hide the alert and keep the service working. If your device is Android 8.0/8.1 system, after you switch off the foreground service alert, you will still see Android system alert. If you are Android 7 or below users, this policy will not affect you. How do I turn this off? Please check here → https://hkjunkcall.com/Rb77 Call Defender ( aka Studio Kuma Call Filter ) is a FREE spam call blocking app that can protect you against annoying spam calls, helping millions of users. Just turn ON "Spam Number Block" when you need to avoid them and enjoy spam free life! Call Defender provides the simplest way to block unwanted calls and protect your privacy with ease. Call defender also lets you know Caller Identification using our comprehensive global database with over 600 million numbers. PLUS! With all new Point System, you use get Call Defender Pro for FREE. ► Block unwanted spam calls automatically ► Find out Caller ID from unknown phone numbers ► Use Pro version for FREE with Point System ► Advanced settings for advanced users ► Search spam number database ► Get Daily Call Report for any blocked / missed calls ► Do not be disturbed by any calls using Quiet Mode If you have any questions, please feel free to contact us via [Menu > About > Contact us] or mail ([email protected]). Note • To make sure Call Defender works properly, please load the app at least once after installation. • If you are using optimization software, make sure to put Call Defender as trusted app. • From Android OS 4.4 or above, SMS cannot be blocked due to system limitation. • Network connection is required for database download or caller ID feature • Devices using unofficial Android framewwork may have compatibility issues.

Security & authenticity

Security rating: Trusted

Signing certificate

Signature matches the Google Play version Checked by the source store on Jun 25, 2026.
Certificate issued to “Studio KUMA” This is the certificate of the Google Play version.

Store checks and file details

Developer signature verified Jun 25, 2026
Validated against Google Play Jun 25, 2026
Signed byCN=Stark Wong, O=Studio KUMA, ST=Kowloon, C=HK
Signing certificate (SHA-1)6E:FE:2F:DB:F5:31:C2:76:73:4D:AA:E1:A9:5A:60:A4:A4:DF:EB:4F
File MD56aafaee5bc6cf4996df55cabd55d0fdf
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. AAPKs doesn't scan files itself — compare the MD5 and signer after downloading.

Permissions (29)

Call Defender requests 29 permissions, 10 of them sensitive.

Answer phone calls Sensitive android.permission.ANSWER_PHONE_CALLS
Call phone Sensitive android.permission.CALL_PHONE
Display over other apps Sensitive android.permission.SYSTEM_ALERT_WINDOW
Find accounts on the device Sensitive android.permission.GET_ACCOUNTS
Modify shared storage Sensitive android.permission.WRITE_EXTERNAL_STORAGE
Process outgoing calls Sensitive android.permission.PROCESS_OUTGOING_CALLS
Read call log Sensitive android.permission.READ_CALL_LOG
Read contacts Sensitive android.permission.READ_CONTACTS
Read phone status and identity Sensitive android.permission.READ_PHONE_STATE
Write contacts Sensitive android.permission.WRITE_CONTACTS
Access notification policy android.permission.ACCESS_NOTIFICATION_POLICY
Access superuser android.permission.ACCESS_SUPERUSER
Control vibration android.permission.VIBRATE
Disable keyguard android.permission.DISABLE_KEYGUARD
Full network access android.permission.INTERNET
Get tasks android.permission.GET_TASKS
Google Play install referrer com.google.android.finsky.permission.BIND_GET_INSTALL_REFERRER_SERVICE
In-app purchases (Google Play Billing) com.android.vending.BILLING
Nfc android.permission.NFC
Prevent the device from sleeping android.permission.WAKE_LOCK
Push messaging (app-defined) com.studiokuma.callfilter.permission.C2D_MESSAGE
Read Google service settings com.google.android.providers.gsf.permission.READ_GSERVICES
Read logs android.permission.READ_LOGS
Receive push notifications com.google.android.c2dm.permission.RECEIVE
Request ignore battery optimizations android.permission.REQUEST_IGNORE_BATTERY_OPTIMIZATIONS
Run at startup android.permission.RECEIVE_BOOT_COMPLETED
Run foreground services android.permission.FOREGROUND_SERVICE
View Wi-Fi connections android.permission.ACCESS_WIFI_STATE
View network connections android.permission.ACCESS_NETWORK_STATE

Required hardware & features

Basic touch input android.hardware.faketouch
Portrait screen android.hardware.screen.portrait
Telephony (SIM) android.hardware.telephony
Wi-Fi android.hardware.wifi

Call Defender 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 Call Defender free?

The APK is free to download, but the app offers in-app purchases through Google Play.

Is the Call Defender 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. After downloading, check that the file's MD5 is 6aafaee5bc6cf4996df55cabd55d0fdf.