10 Best Call Blocker Apps for Android in 2026

We compared free and freemium Android call blockers by privacy, blocking method, cost, setup, and who each option serves best. Our top pick is Block Unknown Callers for people who want private, on-device blocking without contacts permission.

Editorial disclosure: Life Software Lab develops Block Unknown Callers, the app ranked first in this guide. We publish our scoring priorities below, link to first-party sources, and explain where competing apps are a better choice. This is a research-based editorial comparison, not a claim that one app is best for every user.

Call blockers solve different problems. Some identify unknown callers with a cloud database. Some apply local rules such as blocking private numbers or every number outside your contacts. Others add carrier-level filtering, voicemail, SMS tools, or Pixel-only screening. A fair ranking has to make those trade-offs visible.

How we ranked the apps

Our ranking prioritizes a quiet phone with minimal data exposure. We weighted the categories as follows: privacy and permissions 30%, blocking fit and control 25%, useful free access 15%, setup and reliability 10%, feature clarity 10%, and device or regional availability 10%. Features, prices, and availability can change, so confirm the current Google Play listing before installing.

Because privacy receives the largest weight, a simple on-device blocker can rank above a more feature-rich caller ID service. If identifying names is your priority, use the “best for” column rather than treating the order as universal.

Top 10 at a glance

Rank and app	Best for	Free access	Main trade-off
1. Block Unknown Callers	Private non-contact blocking	Free, ad-supported	No caller-name database
2. Phone by Google	Built-in spam protection	Free	Features vary by device and country
3. Truecaller	Caller names and reputation	Free tier	Account-based cloud service
4. Hiya	Spam and fraud warnings	Free tier	Cloud-powered identification
5. Should I Answer?	Community ratings with offline data	Free features	Database updates and extras may be paid
6. Whoscall	Calls, messages, and scam checks	Free tier	Broader data-powered feature set
7. Calls Blacklist	Prefix rules and schedules	Free, with paid extras	Manual rules need maintenance
8. CallApp	All-in-one caller and messaging tools	Free tier	More permissions and complexity
9. YouMail	Spam blocking plus visual voicemail	Free tier in supported markets	Carrier and regional dependence
10. Carrier spam apps	Network-level filtering	Varies by carrier	Country, carrier, and plan limits

1. Block Unknown Callers — best for privacy

Block Unknown Callers is our top pick for a focused reason: it blocks or silences numbers not saved in your contacts without requesting contacts permission. Android performs the contact match inside the operating system, while blocking decisions and settings stay on the device. There is no account or cloud caller database.

It also offers an allow list, repeat-call bypass, block or silence modes, statistics, and a pause switch for times when you expect a delivery, clinic, or job call. It is free and ad-supported. The limitation is deliberate: it does not identify an unknown caller's name. Choose it when privacy and fewer interruptions matter more than caller ID.

2. Phone by Google — best built-in option

Phone by Google provides caller ID, spam warnings, blocking, and on supported Pixel phones, Call Screen. Google says numbers outside your contacts may be sent to Google to identify a business or determine spam, while numbers from your contact list are not sent for that feature. Pixel Call Screen can ask a caller why they are calling and keep transcripts on the device.

It ranks highly because it may already be installed and is easy to enable. Its strongest screening features vary by device, language, and country, and spam filtering is not the same as automatically blocking every non-contact.

3. Truecaller — best for caller identification

Truecaller's main advantage is its large caller ID and community spam database. It can show names, business labels, and spam reputation before you answer, with additional communication features in the app. That makes it a better choice than our top pick when identifying unknown callers is essential.

The trade-off is an account-based, cloud-backed model with a broader feature and permission footprint. Review its current Play data-safety and permission details for your region. For a narrower comparison, see our private Truecaller alternative guide.

4. Hiya — best for fraud-focused warnings

Hiya combines caller ID, spam blocking, reverse lookup, and fraud warnings. It is a practical middle ground for users who want caller intelligence without choosing the largest all-in-one communication app. Some capabilities are premium, and identification depends on a cloud service, so check current regional pricing and data practices.

5. Should I Answer? — best community-powered offline database

Should I Answer? uses community ratings to warn about or block nuisance numbers. Its Play listing says the database can work offline after it is downloaded, and users can configure hidden, foreign, premium-rate, block, and allow rules. This is useful when you want reputation data with some offline capability. Database automation and other extras may depend on paid features, so check the current offer.

6. Whoscall — best broad scam-checking toolkit

Whoscall identifies and blocks suspicious calls and also includes message, URL, number, and screenshot checks. Its broad safety toolkit and strong presence in parts of Asia can make it attractive for users facing scams across several channels. That breadth also means it is less minimal than a call-only blocker; review the Play data-safety section and available features in your market.

7. Calls Blacklist — best for custom rules and schedules

Calls Blacklist focuses on hands-on control: exact numbers, prefixes, contains-pattern rules, private or unknown calls, allow lists, and time-based schedules. It requires no account according to its Play listing. It is a good choice when you know the patterns you want to block, though manual lists and rules need more maintenance than a reputation database.

8. CallApp — best all-in-one feature set

CallApp combines caller ID, spam blocking, reverse lookup, messaging, and call recording on supported devices. It suits users who want one feature-rich phone utility rather than a single-purpose blocker. The cost of that breadth is a more complex experience and a wider permission surface, particularly when optional SMS or recording features are enabled.

9. YouMail — best for spam blocking with visual voicemail

YouMail combines robocall blocking with visual voicemail and voicemail handling. It can be especially useful for people who want blocked callers handled at the voicemail layer rather than only rejected on the device. Carrier compatibility, free-tier limits, and availability vary, so confirm that your carrier and country are supported.

10. Carrier spam apps — best extra network layer

Mobile providers may offer their own spam-labeling or blocking apps. Because the carrier sees calls before Android receives them, these tools can add a useful network layer. Their features and prices vary by carrier, plan, and country, and they rarely guarantee that every spoofed or first-time scam number will be stopped. They work best alongside a device-level blocker.

How to choose

Want every non-contact silenced privately? Start with Block Unknown Callers.
Need names for unknown callers? Consider Truecaller, Hiya, Whoscall, or CallApp.
Want built-in protection? Enable Phone by Google and Pixel Call Screen where available.
Prefer custom prefixes and schedules? Try Calls Blacklist.
Need voicemail handling? Check YouMail compatibility.
For layered protection, keep your carrier tool enabled alongside the device-level option you choose.

Try the privacy-first blocker
Free - No sign-up - No contacts access

Get it on Google Play

Sources

App features and business models change. These first-party listings and help pages were checked on July 11, 2026.

Frequently asked questions

What is the best free call blocker app for Android?

We rank Block Unknown Callers first for privacy-focused users because it blocks or silences non-contacts without sign-up or contacts permission. If caller names matter more, Truecaller or another caller ID database may fit better.

Can I block spam calls without sharing my contacts?

Yes. A rule-based Android call-screening app can block numbers not in your contacts without reading your contact list, because Android performs the contact match internally.

Is Phone by Google enough to stop spam calls?

It helps, especially on supported Pixel devices, but spam labels and Call Screen are not the same as blocking every non-contact. Many people use both built-in protection and a dedicated blocker.

Do free call blockers work offline?

Rule-based blockers can work offline because they do not need a caller ID lookup. Apps that identify names or spam reputation generally need a network connection for the latest database results.

Why is Block Unknown Callers ranked first on its developer's website?

Life Software Lab publishes this guide and develops the app. The ranking therefore discloses that relationship and uses published criteria that give privacy and permissions the largest weight. The guide also names competitors as better choices for caller identification, voicemail, and other needs.