Protect Your Phone from Unwanted Calls and Messages

Your phone should connect you with people you trust, not stress you with robocalls and scam texts.

A good Spam Blocker App stops most junk before it reaches you.

In this guide, you will discover the 5 best apps, how to set them up in minutes, and smart tips to stay protected every day.

This article is independent and has no affiliation, sponsorship, or control by the brands and platforms mentioned.

We only share accurate, verified, and practical information for you to use with confidence.

What is a Spam Blocker App?

A Spam Blocker App identifies and blocks unwanted calls and messages from telemarketers, scammers, and robocall systems.

It uses large databases, caller ID, machine learning, and community reports to decide what should ring and what should be silenced.

Many apps also filter suspicious SMS links and flag risky numbers before you pick up.

You stay in control, and real contacts still get through.

How does a Spam Blocker App work?

When a call comes in, the app checks the number against known spam lists and patterns.

If it matches, the app blocks or silences the call so your phone does not ring.

If the number is unknown but looks suspicious, the app warns you and shows a “spam likely” label so you can decide.

For texts, the app analyzes links and keywords and moves bad messages to a spam folder.

This process runs in the background and requires the proper permissions during setup.

The result is fewer interruptions and more peace of mind.

The 5 Best Spam Blocker App options in 2025

Below are five reliable apps that block calls and texts and are easy to set up.

Each one includes quick steps and direct download hyperlinks for iOS and Android inside the app section.

1) Truecaller

Truecaller is one of the most popular call-identification apps worldwide, powered by a massive community of reports and daily updates.

It identifies callers in real time and blocks spam calls and SMS automatically.

The app highlights unknown numbers with labels and shows trusted names when available.

You can search numbers, report new spam, and keep an allowlist for important contacts.

It is simple to install and quick to tune for your comfort level.

Standout features

• Powerful caller ID and automatic spam blocking.
• Community-driven database with worldwide coverage.
• Reverse number lookup and SMS spam filtering.
• Clean interface with easy block and allow controls.

How to set up (iPhone)

1. Install the app and open it.
2. Go to Settings → Phone → Call Blocking & Identification.
3. Enable Truecaller for Caller ID and blocking.
4. Back in the app, choose your block level and notifications.
5. Add key contacts to the allowlist so they always ring.

How to set up (Android)

1. Install and open the app.
2. Set Truecaller as your default Caller ID & spam app if prompted.
3. Turn on spam protection and choose whether to block or only warn.
4. Enable SMS filtering if you want junk texts moved automatically.
5. Review the first few days of logs and adjust rules as you like.

Who it’s best for

People who want strong call identification plus automatic blocking with a huge community behind it.

Pricing note

Free to start, with optional premium features.

Download

Download on iOS: Truecaller – App Store

Download on Android: Truecaller – Google Play

2) Hiya

Hiya focuses on clean design, accurate caller ID, and easy blocking.

It can show a reason for calling when available and includes useful call screening on supported phones.

The app brings a friendly interface that is simple enough for first-time users.

You can allow contacts by default, silence unknown callers, or block specific categories of spam.

Standout features

• Advanced caller ID with spam and fraud blocking.
• Optional call screening to ask unknown callers to identify themselves.
• Reverse number lookup and SMS protection on supported devices.
• Lightweight app with clear alerts and warnings.

How to set up (iPhone)

1. Install and open Hiya.
2. Go to Settings → Phone → Call Blocking & Identification.
3. Enable Hiya for caller ID and blocking.
4. In Hiya, turn on spam protection and adjust the block level.
5. Choose whether to silence unknown callers or only label them.

How to set up (Android)

1. Install and open Hiya.
2. In system settings, enable caller ID and spam protection when prompted.
3. Allow required permissions for contacts and calls.
4. In the app, choose whether to block, silence, or warn about suspected spam calls.
5. Explore the screen-call option if your device supports it.

Who it’s best for

Users who want a simple, polished experience with strong caller ID and screening.

Pricing note

Free basic features with optional premium.

Download

Download on iOS: Hiya – App Store

Download on Android: Hiya – Google Play

3) RoboKiller

RoboKiller is known for aggressive spam blocking and its playful “answer bots” that waste spammers’ time.

It filters spam texts, labels risky calls, and keeps an easy-to-read log of actions.

If you enjoy fighting back, the optional bots add some fun while keeping scammers occupied.

If you just want silence, you can disable bots and use standard auto-blocking instead.

Standout features

• Large, constantly updated spam database.
• Optional Answer Bots to engage robocallers so you do not have to.
• Clear call logs, categories, and custom rules.
• SMS filtering and link-safety alerts on supported devices.

How to set up (iPhone)

1. Install and open RoboKiller.
2. Go to Settings → Phone → Call Blocking & Identification.
3. Enable RoboKiller.
4. Open the app to choose default block actions and bot behavior.
5. Mark any mistakenly blocked numbers as allowed.

How to set up (Android)

1. Install and open RoboKiller.
2. Grant call, contacts, and overlay permissions when asked.
3. Turn on spam protection and choose the block rules you prefer.
4. Enable or disable Answer Bots based on your style.
5. Review early notifications to fine-tune sensitivity.

Who it’s best for

People who want very strong blocking and do not mind using Answer Bots to fight back.

Pricing note

Free trial with subscription options.

Download

Download on iOS: RoboKiller – App Store

Download on Android: RoboKiller – Google Play

4) Call Control

Call Control combines automatic blocking with deep manual controls.

You can customize rules, maintain allowlists, block specific area codes, and even schedule quiet hours.

Its community blacklist helps block known bad actors, while your personal rules tailor protection to your life.

If you still have a landline, the brand also offers hardware to extend protection at home.

Standout features

• Community-powered blacklist and smart blocking.
• Personal allowlist and blocklist with flexible rules.
• Scheduled Do Not Disturb windows and quiet hours.
• Optional landline protection via Call Control Home hardware.

How to set up (iPhone)

1. Install and open Call Control.
2. Go to Settings → Phone → Call Blocking & Identification.
3. Enable Call Control.
4. Pick between warning and auto-block modes in the app.
5. Add VIP contacts to your allowlist so they always ring.

How to set up (Android)

1. Install and open Call Control.
2. Allow permissions when prompted.
3. Turn on the community database and select your block level.
4. Create your own custom rules for repeated offenders.
5. Enable SMS filtering if available on your device.

Who it’s best for

Users who want strong community blocking plus granular control and optional landline coverage.

Pricing note

Free to download with optional premium.

Download

Download on iOS: Call Control – App Store

Download on Android: Call Control – Google Play

5) Should I Answer?

“Should I Answer?” is a privacy-friendly blocker with a community database and a straightforward interface.

You can see crowd ratings for numbers, block by category, and keep things simple with clear toggles.

Many users pick it for a no-nonsense experience that still filters most junk.

It is a great fit if you prefer lightweight apps and transparent privacy signals.

Standout features

• Community ratings help you decide whether to block or allow.
• Strong focus on privacy and clear, minimal controls.
• Free core features with simple setup.
• Works well on older devices and entry-level phones.

How to set up (iPhone)

1. Install and open the app.
2. Go to Settings → Phone → Call Blocking & Identification.
3. Enable “Should I Answer?” for caller ID and blocking.
4. Adjust your block level inside the app.
5. Check the log weekly and fine-tune if needed.

How to set up (Android)

1. Install and open the app.
2. Grant call permissions and enable the blocker.
3. Choose whether to auto-block, warn, or allow unknown calls.
4. Turn on SMS filtering if your phone supports it.
5. Add essential contacts to your allowlist.

Who it’s best for

Anyone who values privacy and wants a simple, no-frills spam blocker.

Pricing note

Free core use, with optional extras depending on platform.

Download

Download on iOS: Should I Answer? – App Store

Download on Android: Should I Answer? – Google Play

Built-in protections you should turn on (free and fast)

Even with a powerful Spam Blocker App, use your phone’s built-in tools for extra safety.

These features work system-wide and take minutes to enable.

On iPhone

• Silence unknown callers if spam is overwhelming.
• Filter unknown senders in Messages and review the Junk or Spam folder.
• Keep “Share Name and Photo” limited to contacts to reduce random iMessage pings.
• Update iOS regularly so the latest protections are active.

On Android

• Turn on Caller ID and Spam Protection in your default Phone app.
• If your device supports Call Screen or Smart Call, enable it to auto-screen robocalls.
• Use Messages’ spam protection to move suspicious texts to a separate folder.
• Keep Google Play Protect on and your system updated for ongoing safety fixes.

How to choose the best Spam Blocker App for your needs

Pick an app that matches how you use your phone and what you value most.

Start free, try it for a week, and upgrade only if needed.

• Identification accuracy.
  If you need to know exactly who is calling, choose an app with strong caller ID and large databases.
• Blocking strength.
  If interruptions are the main issue, favor apps that auto-block most spam by default and let you silence unknown callers.
• Privacy controls.
  Check the app’s data collection notes and permissions, and prefer apps that clearly explain what is collected and why.
• SMS filtering.
  If spam texts are common, pick an app that filters SMS and detects dangerous links.
• Ease of use.
  If you want a “set and forget” tool, select an app with simple setup and clear labels.
• Cost vs. value.
  Start with free features, then consider premium if you need extras like advanced screening, more detailed caller info, or ad-free use.
• Support and updates.
  Apps that update frequently adapt faster to new scam tactics.

Step-by-step setup checklist (works for any app)

1. Install your chosen app from the App Store or Google Play.
2. Open the app and allow required permissions so it can detect calls and texts.
3. On iPhone, go to Settings → Phone → Call Blocking & Identification and enable the app.
4. On Android, set the app as your Caller ID & spam app if asked.
5. Turn on auto-block for known spam, and choose whether to silence or warn on suspicious callers.
6. Add important numbers to your allowlist so they always ring.
7. Review the block log weekly, and adjust your rules if a good call was blocked.
8. Turn on SMS filtering if you receive many scam texts.
9. Keep the app updated for the newest spam patterns.
10. Report new spam numbers inside the app to help the community.

Pro tips to get more protection

1. Keep your app updated so it recognizes the newest scam patterns.
2. Enable both the app’s protection and your phone’s built-in spam controls.
3. Report new spam numbers inside the app to help the community database grow.
4. Avoid tapping links in unknown texts, even if they look urgent or mention deliveries, bank issues, or prizes.
5. Never share passwords, verification codes, or banking details over the phone or SMS.
6. If a call feels suspicious, hang up and contact the company using an official number from their website.
7. Use voicemail wisely and let unknown numbers go to voicemail when you are unsure.
8. Consider a simple rule: if someone is pressuring you to act fast, it is probably a scam.
9. Share these habits with family members who are less tech-savvy so they stay safe too.

Frequently asked questions

Do these apps block 100% of spam?

No tool catches everything, but the top apps block the vast majority of junk calls and texts.

Combining an app with your phone’s built-in settings gets the best results.

Will real calls be blocked by mistake?

False positives are rare when you enable allowlists and keep default settings.

Always check the block log and mark good numbers as allowed.

Do I need to pay?

All five apps offer free versions or trials, and most users start there.

Consider premium only if the paid features solve a real problem for you.

Is my data safe?

Check the store listing and privacy policy for each app.

Look for clear data-collection notes and permissions before you install.

Can I use more than one app?

On iPhone, you can enable multiple call-identification extensions, but using one main blocker is simpler.

On Android, only one app can be the active default “Caller ID & spam” app at a time, so pick your favorite.

Do these apps work when I travel?

Many do, but accuracy depends on local databases.

If you travel often, pick an app with broad international coverage or switch to a local favorite during trips.

What about WhatsApp and other messengers?

These apps focus on carrier calls and SMS.

Use each messenger’s built-in report and block tools for spam within those platforms.

Can I block by area code or country?

Some apps include advanced rules for regions.

Use them carefully to avoid blocking legitimate calls from those areas.

Final checklist to stay spam-free

1. Choose one Spam Blocker App from the list and install it today.
2. Enable call identification and spam blocking in your phone settings.
3. Turn on SMS filtering and check the spam folder weekly.
4. Add your important contacts to your allowlist.
5. Keep everything updated and report new spam numbers.
6. Combine smart tools with smart habits, and your phone becomes peaceful again.

Important disclosure

This content is independent and not affiliated with, sponsored by, or controlled by any third parties cited here.

All brand names, logos, and trademarks are the property of their respective owners.

We share this information for educational purposes only and do not guarantee outcomes, performance, or third-party policies.