# Drill Calc vs Transition Layouts

The clearest difference is review sentiment: Drill Calc at 92% against Transition Layouts's 0%. Drill Calc also leads on update cadence (every 18 months vs every 56 months) and iOS requirement (12.0 vs 16.1). On price, ads, in-app purchases and monetization model there is nothing between them.

Drill Calc costs $2.99 and Transition Layouts $2.99 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 every 56 months. The most recent releases landed on August 12, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | Drill Calc | Transition Layouts |
| --- | --- | --- |
| Price | $2.99 | $2.99 |
| Rating | **[4.1 (19 ratings)](https://appshunter.io/ios/app/drill-calc/id304434324/reviews)** | — |
| Number of ratings | **19** | — |
| Positive reviews | **91.7% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 18 months** | Every 56 months |
| Monetization | Paid | Paid |
| Size | 5 MB | 1 MB |
| Requires iOS | **12.0** | 16.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Black Cat Systems](https://appshunter.io/developer/301047032) | [Imran Pinjara](https://appshunter.io/developer/1484488781) |

## What reviewers say

### Drill Calc

[App page](https://appshunter.io/ios/app/drill-calc/id304434324)

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.

**Highlights:** 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

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

**In-app purchases:** none


### Transition Layouts

[App page](https://appshunter.io/ios/app/transition-layouts/id1490428137)

This app assists in developing fabrication layouts for various shapes, including square-to-round, rectangular-to-round, pyramid, and truncated pyramid transitions. It offers options for different joint and line configurations to generate precise layout patterns.

**Highlights:** Square to Round layout development, Rectangular to Round layout development, Pyramid shape layout generation, Truncated Pyramid layout generation, Customizable joint and line options, Supports 1, 2, and 4 part layouts

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

**In-app purchases:** none


## Frequently asked questions

### Is Drill Calc free?

Drill Calc costs $2.99, with no in-app purchases.

### Is Transition Layouts free?

Transition Layouts costs $2.99, with no in-app purchases.

### Do Drill Calc or Transition Layouts have ads?

Neither Drill Calc nor Transition Layouts shows ads.

### Which is updated more often, Drill Calc or Transition Layouts?

Drill Calc ships an update every 18 months, and Transition Layouts every 56 months. Most recently, Drill Calc was updated on August 12, 2026 and Transition Layouts on September 15, 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.*