# WS Drill Bits vs Circle & Sphere

The clearest difference is rating: WS Drill Bits at 5.0 against Circle & Sphere's 4.0. WS Drill Bits also leads on in-app purchases (none vs 8) and iOS requirement (9.0 vs 15.0). Circle & Sphere's advantage is update cadence (every 3 weeks vs every 16 months). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. Circle & Sphere sells 8 one-off in-app purchases. WS Drill Bits asks for nothing beyond the download.

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 4 respectively.

WS Drill Bits ships an update every 16 months, Circle & Sphere every 3 weeks. The most recent releases landed on June 10, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | WS Drill Bits | Circle & Sphere |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/ws-drill-bits/id1453137463/reviews)** | [4.0 (4 ratings)](https://appshunter.io/ios/app/circle-and-sphere/id1564077078/reviews) |
| Number of ratings | 2 | **4** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 16 months | **Every 3 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 57 MB | 180 MB |
| Requires iOS | **9.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Rein Rapp](https://appshunter.io/developer/1031133571) | [Glindemann, Sennoun, Langer GbR](https://appshunter.io/developer/1024972809) |

## What reviewers say

### 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


### Circle & Sphere

[App page](https://appshunter.io/ios/app/circle-and-sphere/id1564077078)

Instantly solve geometry problems for homework and exams. Calculate circle and sphere properties with step-by-step solutions. Access learning videos and manage your calculations.

**Highlights:** Circle calculations (radius, diameter, circumference, area), Sphere calculations (surface area, volume), Circular sector calculations, Step-by-step solutions, Learning videos, Solution management

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| +30 User Tokens | $0.29 | one-time |
| +1 Convenience Token / 6h, max. +2 | $0.59 | one-time |
| +2 Convenience Tokens / 6h, max. +4 | $0.99 | one-time |
| +150 User Tokens | $0.99 | one-time |
| +300 User Tokens | $1.49 | one-time |
| +4 Convenience Tokens / 6h, max. +8 | $1.59 | one-time |
| Remove Ads | $2.99 | one-time |
| Lifetime Access | $2.99 | one-time |


## Frequently asked questions

### Is WS Drill Bits free?

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

### Is Circle & Sphere free?

Circle & Sphere is free to download, with in-app purchases available.

### Which has better reviews, WS Drill Bits or Circle & Sphere?

WS Drill Bits is rated higher. WS Drill Bits averages 5.0 out of 5 from 2 ratings, while Circle & Sphere averages 4.0 from 4 ratings.

### Do WS Drill Bits or Circle & Sphere have ads?

Neither WS Drill Bits nor Circle & Sphere shows ads.

### Which is updated more often, WS Drill Bits or Circle & Sphere?

WS Drill Bits ships an update every 16 months, and Circle & Sphere every 3 weeks. Most recently, WS Drill Bits was updated on June 10, 2026 and Circle & Sphere on September 19, 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.*