# Drill Calc vs BuildersCalcsRoof

The clearest difference is rating: Drill Calc at 4.1 against BuildersCalcsRoof's 2.4. Drill Calc also leads on review sentiment (92% vs 50%). BuildersCalcsRoof's advantage is update cadence (every 8 months vs every 18 months) and iOS requirement (10.0 vs 12.0). On price, ratings volume, ads and in-app purchases there is nothing between them.

Drill Calc costs $2.99 and BuildersCalcsRoof $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Drill Calc holds the better App Store score, 4.1 against 2.4. Both are backed by a comparable volume of ratings — 19 and 8 respectively. Written reviews point the same way: 92% of Drill Calc's written reviews are positive against 50% of BuildersCalcsRoof's.

Drill Calc ships an update every 18 months, BuildersCalcsRoof every 8 months. The most recent releases landed on October 31, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | Drill Calc | BuildersCalcsRoof |
| --- | --- | --- |
| Price | $2.99 | $2.99 |
| Rating | **[4.1 (19 ratings)](https://appshunter.io/ios/app/drill-calc/id304434324/reviews)** | [2.4 (8 ratings)](https://appshunter.io/ios/app/builderscalcsroof/id398471596/reviews) |
| Number of ratings | **19** | 8 |
| Positive reviews | **91.7% of reviews** | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 18 months | **Every 8 months** |
| Monetization | Paid | Paid |
| Size | 5 MB | 14 MB |
| Requires iOS | 12.0 | **10.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Black Cat Systems](https://appshunter.io/developer/301047032) | [Robert Thompson](https://appshunter.io/developer/364220435) |

## 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


### BuildersCalcsRoof

[App page](https://appshunter.io/ios/app/builderscalcsroof/id398471596)

This app eliminates guesswork for roof construction by providing precise measurements for rafters, angles, and birdsmouths. It accommodates any building size and offers both metric and imperial units, making complex roof cuts simple.

**Highlights:** Rafter, Hip, and Jack Rafter Lengths, Angle Cuts and Birdsmouth Dimensions, Metric and Imperial Unit Support, Adjustable Overhangs, Timber Size Checks (Eurocode 5), Stores Settings for Recall

**Features:** 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 BuildersCalcsRoof free?

BuildersCalcsRoof costs $2.99, with no in-app purchases.

### Which has better reviews, Drill Calc or BuildersCalcsRoof?

Drill Calc is rated higher. Drill Calc averages 4.1 out of 5 from 19 ratings, while BuildersCalcsRoof averages 2.4 from 8 ratings.

### Do Drill Calc or BuildersCalcsRoof have ads?

Neither Drill Calc nor BuildersCalcsRoof shows ads.

### Which is updated more often, Drill Calc or BuildersCalcsRoof?

Drill Calc ships an update every 18 months, and BuildersCalcsRoof every 8 months. Most recently, Drill Calc was updated on October 31, 2026 and BuildersCalcsRoof on November 6, 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.*