Drill Speed vs Corner Calculus
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Drill Speed
Easily calculate optimal drill speeds for various drill bits and materials with an intuitive icon-based interface. This app automatically adjusts options based on your selections and remembers your progress.
- Intuitive icon-based interface
- Wide selection of drill bits and materials
- Automatic option adjustment
- Detailed drill bit and material information
- Saves selection progress
- Apple Watch companion app
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Quickly and easily find optimal drill speeds for your drill bits and materials. Drill Speed has a simple icon based interface that allows you to rapidly find and select your drill bits and materials; no need to laboriously search through tables. Features - Fast and intuitive interface - Wide selection of drill bits and materials - Materials and size ranges automatically adjust to accompany the selected bit / material - Details about your drill bits and materials - Remembers your selection when you close the app, allowing you to pickup where you left off - Apple Watch companion app for quick and easy reference Get Drill Speed and put away your drill speed charts for good.
Corner Calculus
This professional tool simplifies the calculation of corner miter joints for woodworking projects. It accurately determines edge angles and dimensions for various joint configurations, including corner rounding with a specified radius.
- Miter joint calculation
- Edge angle and dimension calculation
- Corner rounding with radius
- Supports various joint configurations
- Professional woodworking tool
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Application for calculating corner miter joints (connection of parts with beveled butts). This professional tool is indispensable for joinery or carpentry work. The miter joint is extensively used in woodworking in making of boxes, doors, cabinets, etc. Calculating a butted joints is very complicated operation. But not for that application! Calculate exact edge angles and dimensions of parts for various joint configurations. You can set the angle between the sides, the slope of each side. In addition, obtain the dimensions of the intermediate segments for a perfect corner rounding, by specifying the rounding radius. Use this app to take your woodworking to the next level. Surprise yourself by creating complicated things with the amazing carpenter tool - Corner Calculus!
Screenshots
Verdict
The clearest difference is price: Drill Speed at Free against Corner Calculus's $1.99. Drill Speed also leads on rating (5.0 vs 4.3). Corner Calculus's advantage is update cadence (weekly vs every 6 months). On ratings volume, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Drill Speed is free to download; Corner Calculus costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Drill Speed holds the better App Store score, 5.0 against 4.3. Both are backed by a comparable volume of ratings — 2 and 3 respectively.
Drill Speed ships an update every 6 months, Corner Calculus weekly. The most recent releases landed on September 28, 2026 and October 10, 2026 respectively.
| Parameter | Drill Speed | Corner Calculus |
|---|---|---|
| Price | Free — better | $1.99 |
| Rating | 5.0 (2 ratings) — better | 4.3 (3 ratings) |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 2 | 3 — better |
| Update frequency | Every 6 months | Weekly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPod, Apple Watch | iPhone, iPad, iPod |
| Requires iOS | 13.2 | 12.0 — better |
| Further details — not scored | ||
| Size | 41 MB | 12 MB |
| Age rating | 4+ | 4+ |
| Developer | Michael Bykov | Sergey Kirichenko |
Customer experience
Drill Speed
Corner Calculus
In-app purchases
Drill Speed
No in-app purchases
Corner Calculus
No in-app purchases




