8 Best Spam Call Blocker Apps to Stop Unwanted Calls in 2025

Part 1. What to Look for in Spam Call Blocker Apps

If you are unable to determine what the best spam call blocker must have, review the given considerations that you need to check in a foremost application:

1. Comprehensive Spam Database: The ideal spam call blocker app relies on a vast and regularly updated database, featuring a list of known spam numbers. Therefore, having an app with an extensive database makes it easier to stop robocalls, scammers, and telemarketers.
2. Real-Time Call Screening and Blocking: The best call blocking application doesn't wait for you to answer scam calls; instead, it blocks the call instantly after analyzing the database. Thus, look for an application that comes with features like caller ID, AI detection, and smart algorithms to screen calls instantly.
3. Ease of Use and Customization: These applications should be easy to use and allow you to create your own block list, filter calls by type, and set location-based filters. Having clear menus through these features makes it seamless to manage call blocking.
4. Spam Text Protection: Instead of calls, spam texts are a major hurdle too, which should be resolved with these applications rather than seeking another solution. Therefore, look for an application that filters the text messages to protect you from scams and phishing links.
5. Privacy and Security Features: The best spam call blocking application should not only block spam calls but also include features like fraud alerts, identity protection, and "do not disturb" modes. Besides, having some extra features like virtual phone numbers or voicemail management also gives you more control and secure personal details.

Pro Tip. How to Protect Your Secret Contacts from Others

Sometimes, you may want to keep certain contacts private or prevent them from being accessed accidentally. That's where MobileClean - Photo Cleaner app offers you the facility to protect contacts by setting up a passcode or face ID. Upon activating the Secret Contact feature, users can also import multiple contacts in batches to save the manual hassle.

You can choose to delete original contacts from phones for an added layer of privacy. Rather than hiding, the app allows you seamless management of hidden contacts that you can easily download to make them visible again. Alternatively, you can choose to eliminate them from the secret contacts list using the Remove option. While doing all this, the application ensures effortless contact management while maintaining security protocols for sensitive information.

Key Features

1. Private & On-Device Storage: To ensure user privacy and prevent data upload to the cloud, the app securely stores all secret contacts directly on the device.
2. Beginner-Friendly: With the ability to remove and add contacts, the application is easy to use and requires no technical knowledge, making it ideal for beginners.
3. Organized Secret Contacts: Unlike other applications that make data hiding cluttered, MobileClean - Photo Cleaner arranges contacts in alphabetical order to make navigation seamless when you need to remove or download contacts.

User Guide: How to Hide Sensitive Contacts from Others

When looking for a spam blocker for iPhone, learn how you can secure your essential contacts from getting blocked accidentally or just to hide them from others:

01of 03Activate the Secret Space Feature

Head to the "Secret Space" tab, select the "Set Password" option, enter your 4-digit PIN code, and then press the "OK" button.

02of 03Import Contacts to the Secret Contact

Now, choose the "+" icon in the Secret Contact feature and select the contacts from the list, after which you have to press the "Import" button.

03of 03Remove the Original Contacts from iPhone

Once the contacts are added, you can choose to remove them from the iPhone Contacts app by tapping the "Remove" button.

Part 2. Block Scammers Instantly: 8 Best Spam Call Blocker Apps 2025

Whether you are looking for the best spam blocker for Android or iPhone, review this section and locate the 8 foremost options of all:

1. Truecaller (Android | iPhone)

Being a renowned application, Truecaller has the ability to instantly identify unknown callers and flag suspicious numbers with an updated database. It can block robocalls, telemarketers, and other top spammers, or you can create a custom block list to manage call blocking. You can also use this app to stop spam calls by region or country code and stop hidden or private numbers with just a few taps.

Key Features

1. It warns you about suspicious messages, disables dangerous links, and blocks risky senders.
2. The app has an AI-powered assistant that uses speech-to-text and machine learning to screen calls.
3. Updates the spam list automatically for premium users, enabling free users to do so manually.

2. Hiya (Android | iPhone)

As the best iPhone spam call blocker, Hiya uses advanced AI features to make phone communication safer and more secure. Additionally, the app limits the hassle of manually blocking spam calls and automatically blocks robocalls, spam, and scam calls using a constantly updated global database and community reports. Plus, it sends real-time alerts when suspicious numbers try to call, and can detect when scammers use numbers similar to your own.

Key Features

1. Hiya identifies unknown callers and even shows context like names or reasons for calling.
2. The call screening feature filters calls before they connect to ensure only important ones get through.
3. Unlike other apps, it offers secure visual voicemail, with transcription in multiple languages.

3. Whoscall (Android | iPhone)

Among the best spam call blockers for iPhone and Android, it has a large global community database to identify unknown numbers and protect users from scams. Furthermore, it offers manual number lookup to check if a caller is linked to telemarketers or fraud. Unlike other applications, it can work offline with a stored database within supported regions to ensure a real-time and 24/7 call blocking facility.

Key Features

1. It also filters out spam or phishing SMS messages, flagging suspicious links.
2. Users can create their own blocklists for specific numbers, groups, or even hidden/private callers.
3. The app's AI scans numbers, links, and screenshots to warn users about suspicious or dangerous content.

4. Call Control (Android | iPhone)

If you are looking for the best spam blocker for iPhone, Call Control is a trusted spam call blocker that combines smart technology, crowdsourced data, and strict privacy standards. Moreover, the app's Community Controlled system relies on millions of user reports and government data to detect and block spam numbers. Its premium options include blocking by area code, number sequence, or enabling "Do Not Disturb" mode during certain times.

Key Features

1. A built-in reverse lookup feature also helps you research unknown numbers before picking up.
2. Spam calls are blocked quietly in the background, so users aren't bothered by constant interruptions.
3. Works on both iOS and Android devices, and the "Call Control Home" feature extends protection.

5. Mr.Number (Android | iPhone)

Known as the best free spam call blocker app for Android, it provides real-time alerts when suspicious calls come in. Although it gives you the ability to have complete control and customization, you can block by number, area code, or even by country. Calls from private or unknown numbers can be directly forwarded to voicemail, while calls from trusted numbers can be whitelisted to ensure they are always forwarded.

Key Features

1. The app identifies unknown callers in real time, showing names and details linked to the number.
2. Mr. Number integrates smoothly with Apple CallKit and Android phone logs for easier call management.
3. Beyond calls, Mr. Number blocks spam texts and phishing messages and can filter telemarketing messages.

6. KnownCalls (Android)

Within the list of the best apps to stop spam calls, KnownCalls provides strong protection against spammers and robocallers without needing internet access. Besides, to protect the privacy of the users, the app ensures that it does not gather or distribute the call logs. In addition, the app is free of advertisements, subscriptions, and hidden fees, so it is ideal when the user wants affordable solutions.

Key Features

1. Even if the scammers keep changing the numbers, all the unknown calls are rejected immediately.
2. Simple to use and runs smoothly on most Android devices, where regular updates fix issues.
3. It is ideal for anyone and ensures protection from unknown callers, without revealing personal data.

7. Nomorobo (Android | iPhone)

This app can block unknown callers with a database of more than 10 million suspicious numbers that are reported by users. Moreover, the application requests that unknown callers identify themselves, transcribe their answer, and allows users to choose whether to accept, reject, or forward them to voicemail. More than that, it also allows users to record and transcribe voicemails to enable safe reviewing and blocking calls without any hassle.

Key Features

1. It flags and blocks spam texts, phishing attempts, screens SMS messages, and suspicious links.
2. Good at blocking "neighbor spoofing," where scammers use numbers that look similar to your own.
3. Users can customize protection with whitelists for trusted numbers and blacklists for persistent spammers.

8. YouMail (Android | iPhone)

YouMail is the best app for blocking spam calls, as with this, premium users get "audio captcha" screening, where unknown callers must prove they're real people before getting through. Beyond using its extensive database, this application filters out spam messages and makes important ones easy to review. Plus, it lets users personalize voicemail greetings, either by recording their own or choosing from professional options.

Key Features

1. Identifies unknown callers instantly, showing names, locations, and even community feedback to help decide if a call is safe.
2. A privacy scan that checks if personal data is exposed online, with paid options to remove it from data brokers.
3. Premium users also get business tools like virtual numbers, auto-replies, and scheduling links.

Conclusion

Summing up, if you are looking for spam call blocker apps, this article has introduced you to the 8 best options with detailed features. Among these, review and pick the foremost one that meets your call blocking and budget needs. For situations where you need to hide the secret contacts from others, we recommend using MobileClean - Photo Cleaner app, where you can create a Secret Contact and hide multiple contacts simultaneously.