# TechTools App vs NumberBook

The clearest difference is review sentiment: TechTools App at 100% against NumberBook's 20%. TechTools App also leads on in-app purchases (none vs 2). NumberBook's advantage is price (Free vs $4.00) and update cadence (every 2 months vs every 25 months). On ads and device support there is nothing between them.

NumberBook is free to download; TechTools App costs $4.00 up front. NumberBook sells 2 in-app purchases, starting at $3.99 per month. TechTools App asks for nothing beyond the download.

TechTools App ships an update every 25 months, NumberBook every 2 months. Both last shipped on November 3, 2026.

## The numbers

| Metric | TechTools App | NumberBook |
| --- | --- | --- |
| Price | $4.00 | **Free** |
| Rating | — | **[2.5 (6 ratings)](https://appshunter.io/ios/app/numberbook-who-is-calling/id1562671732/reviews)** |
| Number of ratings | — | **6** |
| Positive reviews | **100.0% of reviews** | 20.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 25 months | **Every 2 months** |
| Monetization | **Paid** | Subscription |
| Size | 16 MB | 36 MB |
| Requires iOS | 14.1 | **12.1** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Noe Loridan](https://appshunter.io/developer/1515594299) | [Numbo s.r.o.](https://appshunter.io/developer/1548761994) |

## What reviewers say

### TechTools App

[App page](https://appshunter.io/ios/app/techtools-app/id1515594300)

This app provides essential tools for lighting technicians, desk operators, and network administrators. It includes calculators for DMX addressing, IP addresses, and beam calculations, along with various useful converters for technical data.

**Highlights:** DMX addressing wizard, IP address and class calculator, Color code reference, Beam calculator, Electrical cable color codes, Ingress Protection Code guide, Technical data converters

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

**In-app purchases:** none


### NumberBook

[App page](https://appshunter.io/ios/app/numberbook-who-is-calling/id1562671732)

Instantly identify unknown callers and protect yourself from scams with a vast global database. Perform reverse phone lookups to discover caller identity, location, and user-reported categories like spam or trustworthy. Block unwanted numbers with a personalized blacklist.

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

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium - one month | $3.99 | per month |
| Premium - one year | $14.99 | per year |


## Frequently asked questions

### Is TechTools App free?

TechTools App costs $4.00, with no in-app purchases.

### Is NumberBook free?

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

### Do TechTools App or NumberBook have ads?

Neither TechTools App nor NumberBook shows ads.

### Which is updated more often, TechTools App or NumberBook?

TechTools App ships an update every 25 months, and NumberBook every 2 months. Most recently, TechTools App was updated on November 3, 2026 and NumberBook on November 3, 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.*