Blocks before it rings
Calls on your block list are rejected silently, even when the app is closed and offline.
Free Android call blocker
Stop spam, telemarketing and AI robocalls before they ring
CallGuard blocks unwanted calls on your Android phone, warns you about numbers others reported as AI or robocalls, and keeps working without internet.
0 adsFree, no in-app purchases
OfflineBlocking needs no internet
Before ringBlocked calls never ring
Your choiceAccount and backup optional
Features
Everything you need to take back your phone
Simple switches for the calls you never want, and full control when you need it.
Series and Quick block
Block whole series such as 140 telemarketing, hidden numbers, international calls or every unknown caller.
AI & robocall warnings
Numbers reported by other users are flagged while ringing. Warn, block or ignore: you decide.
One-tap block after a call
A notification after unknown calls lets you block the number with one tap, with Undo.
Caller cards
CallGuard users see your photo and name in a card on incoming calls, in the colour and style you pick.
Built-in phone app
Recent calls with blocked numbers in red and missed calls in yellow, contacts and a dialer.
Backup and restore
Optional account to back up your rules and restore them on a new phone.
Private by design
No ads, no data selling. Without an account, nothing leaves your phone.
How it works
Protected in three steps
1
Install and set up
Download CallGuard and allow it as your call screening app. Your normal phone app keeps working.
2
Choose what to block
Turn on Quick block for unknown, hidden, international or 140 telemarketing calls, or block single numbers and whole series.
3
Calls are screened
Blocked calls are rejected before they ring. Reported AI and robocall numbers get a warning, and one tap blocks them for good.
Privacy
Your calls stay on your phone
CallGuard decides about each call on the device. Nothing about your calls is uploaded unless you choose features that need it.
- Rules, call log and contacts never leave your phone without an account
- Account, backup and caller cards are optional
- No ads, no tracking, no data selling
- Delete your account and data any time, in the app or on this website
Works with no internet
Call blocking runs fully offline, even in flight mode with calls on, after a restart, or when the app is closed.
FAQ
Questions, answered
What is CallGuard?
CallGuard is a free Android app by Aarveta that blocks unwanted calls before your phone rings. You can block single numbers or whole number series, hidden and international callers, and see warnings for numbers that other users reported as AI voices or robocalls. It also includes a phone dialer with recent calls and contacts.
Is CallGuard free?
Yes. CallGuard is free to download and use, with no ads and no in-app purchases.
Does CallGuard work without internet?
Yes. Call blocking runs entirely on your phone and works offline. The internet is only used for the optional account, rule backup, caller cards and to refresh the list of reported AI and robocall numbers.
How does CallGuard detect AI calls and robocalls?
CallGuard recognises AI calls and robocalls by phone number, not by listening to calls. A number is added to the shared list once at least three different CallGuard users report it. By default the app warns you while the phone rings and you decide; you can switch to blocking these numbers automatically.
How do I block telemarketing calls from 140 numbers in India?
Open CallGuard, go to Home and turn on Telemarketing under Quick block. All numbers starting with +91 140 are then rejected before they ring. You can also block any other series, for example a country code.
Which phones does CallGuard support?
CallGuard works on Android 10 and newer. It is not available for iPhone.
Is it safe to install CallGuard from this website?
Yes. The app is signed by Aarveta, and the SHA-256 fingerprint of every version is shown on the download page. Updates are checked against that fingerprint before they are installed, and Android only accepts updates signed with the same key.
What data does CallGuard collect?
Without an account, nothing leaves your phone: your rules, call log and contacts stay on the device. With an optional account, CallGuard stores your email, the profile you choose to fill in, your rule backup and any numbers you report. Caller-card lookups are not stored. CallGuard does not sell data or show ads.
Will CallGuard block my saved contacts?
No, not unless you block that exact number yourself. Broad options such as unknown callers, series, international calls and the AI list never block saved contacts or numbers you marked as trusted.
How do I delete my CallGuard account?
In the app open Settings and tap Delete account, or use the delete account page on callguard.aarveta.com. Your account, profile, photo, backup and reports are deleted permanently.
Get CallGuard 1.0.0
Free for Android 10 and newer · 20.8 MB · Updates itself
SHA-256: edc68bfa83e831b9c5fb07d1c21bed4845fbc9379b53b2ce8fb922f3cf161efb
- Open this page on your Android phone and tap Download APK.
- Open the downloaded file. If asked, allow your browser to install unknown apps.
- Tap Install, open CallGuard and allow it to screen calls.
- If you see Restricted setting: Settings → Apps → CallGuard → ⋮ → Allow restricted settings.