# Numberbook True Caller vs Dzzz

The clearest difference is in-app purchases: Dzzz at none against Numberbook True Caller's 1. Dzzz also leads on ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Numberbook True Caller sells 1 one-off in-app purchase. Dzzz asks for nothing beyond the download.

## The numbers

| Metric | Numberbook True Caller | Dzzz |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (4 ratings)](https://appshunter.io/ios/app/numberbook-true-caller/id6444601287/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Monthly | — |
| Monetization | Free with in-app purchases | — |
| Size | 42 MB | 99 MB |
| Requires iOS | **15.1** | 16.4 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [SILVERSKY TECHNOLOGY](https://appshunter.io/developer/1567194760) | [MuBoori](https://appshunter.io/developer/509884383) |

## What reviewers say

### Numberbook True Caller

[App page](https://appshunter.io/ios/app/numberbook-true-caller/id6444601287)

Instantly identify unknown callers and search for contact information using a vast database. Find names from numbers or numbers from names, and save important contacts with a single click. Supports worldwide searches and country-specific filtering.

**Highlights:** Identify unknown callers, Search by name or number, Find phone numbers from names, Find names from phone numbers, Save contacts easily, Bookmark search results, Worldwide number search

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Caller ID Lookup | $2.99 | one-time |


### Dzzz

[App page](https://appshunter.io/ios/app/dzzz-offline-tools/id6796945310)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Numberbook True Caller free?

Numberbook True Caller is free to download, with in-app purchases available.

### Is Dzzz free?

Dzzz is free to download, with no in-app purchases.

### Do Numberbook True Caller or Dzzz have ads?

Numberbook True Caller shows ads; Dzzz does not.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*