# CallGenius vs Number Book

The clearest difference is update cadence: CallGenius at monthly against Number Book's every 5 months. CallGenius also leads on rating (4.7 vs 4.5) and iOS requirement (12.0 vs 15.0). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. CallGenius sells 2 in-app purchases, starting at $8.99 per 7 days and Number Book sells 5 in-app purchases, starting at $8.99 per 7 days. Whichever you choose, the download price is not the number that matters.

CallGenius holds the better App Store score, 4.7 against 4.5. Both are backed by a comparable volume of ratings — 27 and 44 respectively.

CallGenius ships an update monthly, Number Book every 5 months. The most recent releases landed on September 5, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | CallGenius | Number Book |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (27 ratings)](https://appshunter.io/ios/app/callgenius/id6450162268/reviews)** | [4.5 (44 ratings)](https://appshunter.io/ios/app/number-book/id6475397443/reviews) |
| Number of ratings | 27 | **44** |
| Positive reviews | — | 40.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Monthly** | Every 5 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 74 MB | 46 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 17+ |
| Developer | [InnoCore Limited](https://appshunter.io/developer/1684184883) | [ByteSpeed](https://appshunter.io/developer/1724157365) |

## What reviewers say

### CallGenius

[App page](https://appshunter.io/ios/app/callgenius/id6450162268)

Instantly identify unknown callers and retrieve contact details by entering any phone number. Access a global database and utilize an AI assistant for further information. Manage your subscription easily through account settings.

**Highlights:** Reverse phone lookup, Identify caller names, Retrieve contact details, Global number database, AI assistant for info, Subscription management

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CallGenius PRO | $8.99 | per 7 days |
| CallGenius PRO | $38.99 | per year |


### 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 |


## Frequently asked questions

### Is CallGenius free?

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

### Is Number Book free?

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

### Which has better reviews, CallGenius or Number Book?

CallGenius is rated higher. CallGenius averages 4.7 out of 5 from 27 ratings, while Number Book averages 4.5 from 44 ratings.

### Do CallGenius or Number Book have ads?

Neither CallGenius nor Number Book shows ads.

### Which is updated more often, CallGenius or Number Book?

CallGenius ships an update monthly, and Number Book every 5 months. Most recently, CallGenius was updated on September 5, 2026 and Number Book on September 13, 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.*