# Vibra Calc vs WS Drill Bits

The clearest difference is rating: WS Drill Bits at 5.0 against Vibra Calc's 4.0. WS Drill Bits also leads on update cadence (every 16 months vs every 39 months). 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 — 2 and 2 respectively.

Vibra Calc ships an update every 39 months, WS Drill Bits every 16 months. The most recent releases landed on September 22, 2026 and June 10, 2026 respectively.

## The numbers

| Metric | Vibra Calc | WS Drill Bits |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (2 ratings)](https://appshunter.io/ios/app/vibra-calc/id458723288/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/ws-drill-bits/id1453137463/reviews)** |
| Number of ratings | 2 | 2 |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 39 months | **Every 16 months** |
| Monetization | Free | Free |
| Size | 22 MB | 57 MB |
| Requires iOS | **8.0** | 9.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Motionics LLC](https://appshunter.io/developer/424498959) | [Rein Rapp](https://appshunter.io/developer/1031133571) |

## What reviewers say

### Vibra Calc

[App page](https://appshunter.io/ios/app/vibra-calc/id458723288)

This app calculates vibration frequencies for various rotating machinery components and includes an interactive vibration severity test tool. It also offers a calculator for converting vibration units and a glossary of terms.

**Highlights:** Induction motor frequency calculation, Detailed gear frequencies, Rolling element bearing frequencies, Pump and fan vane pass frequencies, Journal bearing frequencies, Interactive vibration severity test, Vibration unit conversion

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

**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 Vibra Calc free?

Vibra Calc 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, Vibra Calc or WS Drill Bits?

WS Drill Bits is rated higher. Vibra Calc averages 4.0 out of 5 from 2 ratings, while WS Drill Bits averages 5.0 from 2 ratings.

### Do Vibra Calc or WS Drill Bits have ads?

Neither Vibra Calc nor WS Drill Bits shows ads.

### Which is updated more often, Vibra Calc or WS Drill Bits?

Vibra Calc ships an update every 39 months, and WS Drill Bits every 16 months. Most recently, Vibra Calc was updated on September 22, 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.*