Spam calls have become a common problem for smartphone users. Fortunately, several caller ID and spam-blocking apps can automatically detect telemarketers, fraudsters, and scam callers before you answer. Here are the best spam caller blocker apps for Android and iPhone.
1. Truecaller
Truecaller is one of the most popular caller ID and spam blocking apps worldwide. It uses a massive community-powered database to identify unknown numbers and block spam calls automatically.
Features:
- Real-time caller ID
- Automatic spam call blocking
- SMS spam filtering
- Reverse phone number lookup
- Business caller identification
Best For: Users who receive frequent spam and telemarketing calls.
2. Hiya
Hiya offers advanced caller identification with AI-powered spam detection. It helps protect users from fraud, robocalls, and scam calls.
Features:
- Scam detection
- Spam call blocking
- Reverse phone lookup
- Fraud alerts
- No advertisements
Best For: Simple and reliable spam protection.
3. Call Control
Call Control automatically blocks robocalls and unwanted callers using a constantly updated spam database.
Features:
- Community spam list
- Automatic call blocking
- Personal block list
- SMS filtering
- Do Not Disturb mode
Best For: Blocking robocalls and telemarketers.
4. RoboKiller
RoboKiller uses artificial intelligence to block spam calls and even answers scammers with prerecorded bots to waste their time.
Features:
- AI spam detection
- Answer bots
- Spam SMS protection
- Call insights
- Scam prevention
Best For: Maximum scam protection.
5. Should I Answer?
This app uses user reviews and ratings to warn about suspicious phone numbers before you answer.
Features:
- Offline spam database
- Caller ratings
- Automatic blocking
- Community reports
- Lightweight design
Best For: Privacy-conscious users.
6. Mr. Number
Mr. Number helps identify unknown callers and block spam, fraud, and robocalls.
Features:
- Caller ID
- Spam blocking
- Number lookup
- Block by area code
- Personal blacklist
Best For: Easy spam management.
7. Calls Blacklist
A lightweight app designed to block unwanted calls and SMS messages.
Features:
- Call blocking
- SMS blocking
- Blacklist and whitelist
- Schedule blocking
- Low battery usage
Best For: Users looking for a simple blocker.
8. Google Phone
Many Android devices include Google’s Phone app, which has built-in caller ID and spam protection.
Features:
- Spam detection
- Caller ID
- Verified business calls
- Block unwanted numbers
- Visual voicemail (supported devices)
Best For: Android users who prefer a built-in solution.
9. Samsung Smart Call
Samsung Galaxy phones include Smart Call, which identifies and blocks spam callers without requiring a separate app.
Features:
- Built-in spam protection
- Caller identification
- Business information
- Easy blocking
Best For: Samsung smartphone users.
10. Whoscall
Whoscall provides caller identification and offline spam detection with a large global phone number database.
Features:
- Offline caller ID
- Spam blocking
- Number search
- SMS filtering
- Scam alerts
Best For: Travelers and users needing offline protection.
Comparison Table
| App | Caller ID | Spam Blocking | SMS Protection | Free Version |
|---|---|---|---|---|
| Truecaller | ✅ | ✅ | ✅ | ✅ |
| Hiya | ✅ | ✅ | Limited | ✅ |
| Call Control | ✅ | ✅ | ✅ | ✅ |
| RoboKiller | ✅ | ✅ | ✅ | Trial |
| Should I Answer? | ✅ | ✅ | ❌ | ✅ |
| Mr. Number | ✅ | ✅ | Limited | ✅ |
| Calls Blacklist | ❌ | ✅ | ✅ | ✅ |
| Google Phone | ✅ | ✅ | ❌ | ✅ |
| Samsung Smart Call | ✅ | ✅ | ❌ | Built-in |
| Whoscall | ✅ | ✅ | ✅ | ✅ |
Which App Should You Choose?
- Best Overall: Truecaller
- Best Free Option: Google Phone
- Best for Samsung Phones: Samsung Smart Call
- Best Privacy-Focused Choice: Should I Answer?
- Best Premium Protection: RoboKiller
- Best Lightweight App: Calls Blacklist
Final Thoughts
A good spam caller blocker app can save you from scam calls, robocalls, telemarketers, and phishing attempts. If you want the most complete experience with caller identification and spam filtering, Truecaller remains a top choice. If you prefer built-in protection, Google Phone (Android) and Samsung Smart Call (Samsung devices) are excellent alternatives without requiring an extra app.