Drill Calc vs Transition Layouts Pro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Drill Calc
This utility app helps you determine the correct drill bit size for threaded holes. It supports both inch and metric threads, calculates close and tight fit hole sizes, and provides tables for standard drill bit sizes and pipe information.
- Calculates drill bit size for threaded holes
- Supports inch and metric threads
- Displays close and tight fit hole sizes
- Includes standard inch fractional and numeric drill bit tables
- Provides pipe size information
- Offers data on common wood screw sizes
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Need to find the right drill bit size for a hole? Drill Calc calculates the correct drill bit size to use for threaded holes, based on the bolt (tap) diameter and thread pitch and percentage, for both inch and metric threads. Close and tight fit hole sizes for many popular drill sizes are also displayed. It also has tables of standard inch fractional and numeric drill bit sizes, as well as complete information for various pipe sizes. There is also detailed information about the commonly used sizes of wood screws. Buy your copy of Drill Calc today, and put away your drill chart.
Transition Layouts Pro
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This app is design to Square to Round or Rectangular to Round shape, Round to Square or Round to Rectangular Shape, Pyramid Shape, Truncated Pyramid Shape layouts Development for fabrication purpose This app has various options for Square to Round development or Rectangular to Round and Round to Square development or Round Rectangular Development. This is also called Transition Piece development. In This App Following Layout Development Feature is available : 1. Square to Round Layout or Rectangular to Round Layout 2. Round to Square Layout or Round to rectangular Layout 3. Pyramid layout 4. Truncated Pyramid Layouts. This app has three options for development: 1 Part or 1, Joint layout. 2 Part or 2 Joint layouts. 4 Part or 4 Joints Layouts. This app has 12 lines, 24 lines, 36 lines options for layout development. 1. Square to Round Layout or Rectangular to Round Layout : In this option you can layout your shape by selecting no of joint and no of lines for development you want can be selected and input required for generating layout is length and width for base rectangle or square and Round Diameter of top circular shape. Result is generated according to your joint and lines selections. 2. Round to Square Layout or Round to Rectangular Layout : In this option you can layout your shape by selecting no of joint and no of lines for development you want can be selected and input required for generating layout is length and width for base rectangle or square and Round Diameter of top circular shape. Result is generated according to your joint and lines selections. 3. Pyramid Layout : In this option you can layout for pyramid shape by input value of base length , width and Height of Pyramid this tool generate layout of two plates by using this dimension you can easily layout for Pyramid Shape. 4. Truncated Pyramid : In this option you can layout for Truncated pyramid shape by input value of base length , width, Top length and width and Height of Pyramid this tool generate layout of two plates by using this dimension you can easily layout for Truncated Pyramid Shape. This app is useful in fabrication and HVAC applications.
Screenshots
Verdict
The clearest difference is update cadence: Drill Calc at every 18 months against Transition Layouts Pro's every 43 months. Drill Calc also leads on price ($2.99 vs $3.99) and iOS requirement (12.0 vs 16.1). On 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 Calc costs $2.99 and Transition Layouts Pro $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Drill Calc ships an update every 18 months, Transition Layouts Pro every 43 months. The most recent releases landed on August 12, 2026 and September 15, 2026 respectively.
| Parameter | Drill Calc | Transition Layouts Pro |
|---|---|---|
| Price | $2.99 — better | $3.99 |
| Rating | 4.1 (19 ratings) — better | — |
| Positive reviews | 91.7% of reviews | — |
| Number of ratings | 19 — better | — |
| Update frequency | Every 18 months — better | Every 43 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 12.0 — better | 16.1 |
| Further details — not scored | ||
| Size | 5 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Black Cat Systems | Imran Pinjara |
In-app purchases
Drill Calc
No in-app purchases
Transition Layouts Pro
No in-app purchases
Questions
Is Drill Calc free?
Is Transition Layouts Pro free?
Do Drill Calc or Transition Layouts Pro have ads?
Which is updated more often, Drill Calc or Transition Layouts Pro?
Other comparisons
