# Number Book vs Darbi Captain

The clearest difference is in-app purchases: Darbi Captain at none against Number Book's 5. Darbi Captain also leads on update cadence (every 3 days vs every 5 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Number Book sells 5 in-app purchases, starting at $8.99 per 7 days. Darbi Captain asks for nothing beyond the download.

Number Book ships an update every 5 months, Darbi Captain every 3 days. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Number Book | Darbi Captain |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (48 ratings)](https://appshunter.io/ios/app/number-book/id6475397443/reviews)** | — |
| Number of ratings | **48** | — |
| Positive reviews | 40.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 3 days** |
| Monetization | Free with in-app purchases | — |
| Size | 46 MB | 107 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 17+ |
| Developer | [ByteSpeed](https://appshunter.io/developer/1724157365) | [IT PLUS](https://appshunter.io/developer/1024515554) |

## What reviewers say

### Number Book

[App page](https://appshunter.io/ios/app/number-book/id6475397443)

Identify unknown callers, block spam, and manage your contacts with a privacy-focused address book. Access a vast database for reverse phone lookups and public record information to enhance communication security.

**Highlights:** Privacy contact management, Reverse phone number lookup, Identify spam and scam calls, Large phone number database, Caller information retrieval

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly VIP User | $8.99 | per 7 days |
| Monthly VIP User | $19.99 | per month |
| Yearly VIP User | $39.99 | per year |
| Yearly 3DaysTrail VIP User | $39.99 | per year |
| Lifetime VIP User | $45.99 | one-time |


### Darbi Captain

[App page](https://appshunter.io/ios/app/darbi-captain/id6749872965)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Number Book free?

Number Book is free to download, with in-app purchases available.

### Is Darbi Captain free?

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

### Do Number Book or Darbi Captain have ads?

Neither Number Book nor Darbi Captain shows ads.

### Which is updated more often, Number Book or Darbi Captain?

Number Book ships an update every 5 months, and Darbi Captain every 3 days. Most recently, Number Book was updated on October 24, 2026 and Darbi Captain on October 25, 2026.

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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.*