# Engineering HandBook vs WS Drill Bits

The clearest difference is rating: WS Drill Bits at 5.0 against Engineering HandBook's 4.0. Engineering HandBook's advantage is update cadence (every 2 weeks vs every 16 months) and iOS requirement (6.0 vs 9.0). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

WS Drill Bits holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 4 and 2 respectively.

Engineering HandBook ships an update every 2 weeks, WS Drill Bits every 16 months. The most recent releases landed on June 8, 2026 and June 10, 2026 respectively.

## The numbers

| Metric | Engineering HandBook | WS Drill Bits |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (4 ratings)](https://appshunter.io/ios/app/engineering-handbook/id843746804/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/ws-drill-bits/id1453137463/reviews)** |
| Number of ratings | **4** | 2 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 16 months |
| Monetization | Free | Free |
| Size | 12 MB | 57 MB |
| Requires iOS | **6.0** | 9.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Raghu Srinivas](https://appshunter.io/developer/843746807) | [Rein Rapp](https://appshunter.io/developer/1031133571) |

## What reviewers say

### Engineering HandBook

[App page](https://appshunter.io/ios/app/engineering-handbook/id843746804)

Access essential engineering formulas and concepts on the go. This app covers materials, numbers, mechanics, components, and metal cutting operations, providing accurate calculations for various engineering tasks.

**Highlights:** Engineering formulas and calculations, Materials classification and properties, Basic and trigonometric calculations, Unit conversions, Gear drive formulas, Metal cutting operation calculations

**Features:** macOS Compatibility

**In-app purchases:** none


### WS Drill Bits

[App page](https://appshunter.io/ios/app/ws-drill-bits/id1453137463)

This application serves machinists, designers, and manufacturing personnel with essential drill bit calculations. It features a comprehensive drill size chart with decimal equivalents, a calculator for optimal speeds and feeds across various materials, and a tool for determining drill point depth based on angle.

**Highlights:** Drill size and decimal equivalent chart, Fast vertical scrolling with color-coded values, Sliding scale for quick list navigation, Speeds and feeds calculator for various materials, Drill point depth calculator, Supports metric and inch measurements

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Engineering HandBook free?

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

### Is WS Drill Bits free?

WS Drill Bits is free to download, with no in-app purchases.

### Which has better reviews, Engineering HandBook or WS Drill Bits?

WS Drill Bits is rated higher. Engineering HandBook averages 4.0 out of 5 from 4 ratings, while WS Drill Bits averages 5.0 from 2 ratings.

### Do Engineering HandBook or WS Drill Bits have ads?

Neither Engineering HandBook nor WS Drill Bits shows ads.

### Which is updated more often, Engineering HandBook or WS Drill Bits?

Engineering HandBook ships an update every 2 weeks, and WS Drill Bits every 16 months. Most recently, Engineering HandBook was updated on June 8, 2026 and WS Drill Bits on June 10, 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.*