# NumberBook: Who Is Calling? — Phone Book & Lookup

> Identify unknown callers, perform reverse lookups, and block spam numbers. (iPhone/iPad app by Numbo s.r.o..)

- Source: https://appshunter.io/ios/app/numberbook-who-is-calling/id1562671732 (this page in markdown: same URL + `.md`)
- Developer: [Numbo s.r.o.](https://appshunter.io/developer/1548761994)
- Category: Utilities
- Price: Free with in-app purchases
- Rating: 2.50/5 from 6 App Store ratings · 5 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.1 · 36 MB
- Languages: American English, Arabic, French (France)
- Released: 2021-08-03
- Data updated: 2026-08-12
- Monetization: subscription
- User reviews in markdown: https://appshunter.io/ios/app/numberbook-who-is-calling/id1562671732/reviews.md

## What is NumberBook?

Finding unknown numbers was never easier!

Identify up to 99% of unknown calls with NumberBook: Who Is Calling. Our global database of 52 million analyzed numbers and companies instantly protects you from known phone scams. Our phone book is here to help you understand who is on the other end of the line.

But wait - there is more! Who Is Calling isn't an ordinary number book. Through reverse phone lookup, you can see the number's identity, country, and even location. You can finally live spam-call-free and never miss a legitimate phone call again!

WHY TO USE NUMBER BOOK: WHO IS CALLING?
It's fast - type in an unknown number; the number book will identify it and give you context on who's calling.

It's easy - Number Book: Who Is Calling makes phone number lookup pleasant and straightforward.
It's secure - Number Book: Who Is Calling does not gather or monitor your personal data.

ALL NUMBER BOOK: WHO IS CALLING FEATURES
- Large phone numbers database (regularly updated)
- Reverse phone lookup
- Company & Business identification
- Caller ID
- Reporting numbers
- Blacklist

LARGE PHONE NUMBERS DATABASE
We have more than 52 000 000 phone numbers in our database. Our users are helping us by adding new phone numbers every day. We collaborate with companies to make your experience with couriers, companies, or services much smoother. 

REVERSE PHONE LOOKUP
You can search any phone number before you call back. After you type in a number, you will find supplemental information like category, country, location, and comments from other users. There are three categories of phone numbers: spam, suspicious and trustworthy. 

COMPANY & BUSINESS IDENTIFICATION
Number Book: Who is Calling isn't only about finding a number. An essential feature of our app is the identification of companies. You will see on your screen - service, company, and dining places. 

CALLER ID IDENTIFICATION
Number Book: Who is Calling identifies all incoming calls. You will immediately know from which category the unknown number belongs. In some cases, you will see the company's number - for example, Uber, Bolt, Deliveroo, etc.

REPORTING NUMBERS
All users can add new phone numbers to our database, write comments and choose a category for all numbers.

BLACKLIST
Add unwanted phone numbers to your personalized blacklist. You decide which phone numbers will be automatically blocked.

All mentioned features are part of premium subscription, which is mandatory for access to Who Is Calling. Auto-renewing subscription cost $1.99 monthly / $14.99 yearly - price varies by country.
__________________

Privacy Policy: https://www.numbo.com/privacy-policy/
Terms of Use: https://www.numbo.com/terms-of-service/

## Key features

- Unknown call identification
- Reverse phone lookup
- Spam and scam protection
- Company and business identification
- Customizable blacklist
- User-reported number categories

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Premium - one month | $3.99 | per month |
| Premium - one year | $14.99 | per year |


## Recent user reviews (5 of 5)

All indexed reviews: https://appshunter.io/ios/app/numberbook-who-is-calling/id1562671732/reviews.md

### 1/5 — Sophisticated development but no data

*2022-10-02, version 1.4.0*

I tried the app and it has zero data

### 1/5 — Very bad

*2022-07-26*

Very bad application

**Developer response:** Hello, we are very sorry for the low rating. Could you please let us know what you think? Please get in touch with us at support@whoiscalling.app. We will be pleased to help you solve your problem.
Kind Regards, Team WIC

### 1/5 — It is not working.

*2022-07-11*

It is all a lie. It never worked. And it says 3 days trial and when I canceled the subscription, it won’t cancel and did not refunded me the deducted fees for the yearly plan.

**Developer response:** Hello, we are very sorry that you give the application a low rating. Subscription must be canceled within three days, not after three days. We would appreciate it if you could write to us at support@whoiscalling.app. We will be pleased to help you solve your problem.
Best Regards, Team WIC

### 1/5 — من اول ماتفتح التطبيق يطلب منك الشراء وبسعر مرتفع

*2022-01-24, version 1.3.2*

من اول ماتفتح التطبيق يطلب منك الشراء وبسعر مرتفع المفروض يكون هناك فترة تجربه والسعر مبالغ فيه

### 5/5 — Great 💛💛💛💛💛💛💛💛💛💛💛💛💛💛💛💛💛💛💛💛

*2021-11-04*

Great

**Developer response:** Hello, thank you for your nice review. We appreciate it.
Kind Regards, Team WIC

## Frequently asked questions about NumberBook

### What is NumberBook: Who Is Calling?

NumberBook: Who Is Calling is a utility app designed to identify unknown phone numbers, protect users from scams, and provide reverse phone lookup services. It helps users understand who is calling before they answer.

### How large is the NumberBook database?

The app boasts a large phone number database with over 52 million analyzed numbers and companies. This database is regularly updated with contributions from users and collaborations with businesses.

### Does NumberBook: Who Is Calling collect personal data?

No, NumberBook: Who Is Calling is designed to be secure and does not gather or monitor your personal data. User privacy is a key aspect of its design.

### What are the subscription options for NumberBook: Who Is Calling?

The app offers a premium subscription for full access to its features. Options include a monthly subscription for $3.99 and a yearly subscription for $14.99, with a 3-day free trial for the yearly plan.

### How does the reverse phone lookup feature work?

With reverse phone lookup, you can search any phone number to find supplemental information. This includes the number's category (spam, suspicious, trustworthy), country, location, and comments from other users.

### Can I block unwanted numbers with NumberBook: Who Is Calling?

Yes, the app includes a personalized blacklist feature. You can add unwanted phone numbers to this list, and they will be automatically blocked from reaching you.

### What is the age rating for NumberBook: Who Is Calling?

NumberBook: Who Is Calling has an age rating of 4+. This indicates it is suitable for a wide range of users, including children, with minimal content restrictions.

### On which devices can I use NumberBook: Who Is Calling?

NumberBook: Who Is Calling is available for iPhone and iPod devices. It is designed to run on Apple's mobile operating systems.

## Version history (last 5 releases)

### 1.5.1 — 2025-07-28

Bug fixes and improvements in this release include fixes for stability and performance issues.

### 1.4.1 — 2023-10-04

Compatibility with iOS 17

### 1.4.0 — 2022-08-02

The latest version contains bug fixes and performance improvements.

### 1.3.3 — 2022-02-10

Recent updates:
- you can now use the application in French or Arabic
- bug fixes and performance improvements

### 1.3.2 — 2021-12-15

A new update is here!
- From now you can send us feedback even if an error occurred during the database update.
- Minor bug fixes and improvements.

## Apps similar to NumberBook

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Truecaller: Premium Caller ID](https://appshunter.io/ios/app/truecaller-premium-caller-id/id448142450) | 4.4 (251,567) | Free | Utilities |
| [Number Finder Caller ID :True](https://appshunter.io/ios/app/number-finder-caller-id-true/id1324048797) | 4.7 (69,748) | Free | Utilities |
| [Number Book: Al-Kashif](https://appshunter.io/ios/app/number-book-al-kashif/id1642012193) | 4.2 (360) | Free | Utilities |
| [Number Lookup: Who is calling?](https://appshunter.io/ios/app/number-lookup-who-is-calling/id1463138162) | 3.9 (474) | Free | Utilities |
| [Number Book : Phone Lookup](https://appshunter.io/ios/app/number-book-phone-lookup/id1626770418) | 4.2 (266) | Free | Utilities |
| [Reverse Phone Lookup](https://appshunter.io/ios/app/reverse-phone-lookup/id430478223) | 4.6 (11,269) | Free | Utilities |

## More apps by Numbo s.r.o.

- [Numbo: Scam Call ID & Lookup](https://appshunter.io/ios/app/numbo-scam-call-id-and-lookup/id1256912189)

All apps by Numbo s.r.o.: https://appshunter.io/developer/1548761994

## Related topics

[who is calling](https://appshunter.io/ios/topics/who-is-calling)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-12.*