Drill Calc vs Drive Diagnostics
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.
Drive Diagnostics
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If you require assistance for the diagnostics of your Bonfiglioli frequency inverter. Check this app! You can easily look for fault codes of supported Bonfiglioli frequency inverters series: * ACT - ACTIVE * ACU - ACTIVE CUBE * ANG - ACTIVE NEXT GENERATION * AGL - AGILE How to use: Just enter the Fault Code and the device displays immediately the cause and useful remedy information. For more complex cases you can also find the contact information of Bonfiglioli support team in the dedicated section. Moreover, inside the app you can find our most frequently asked questions that can help you in your daily usage of Bonfiglioli inverters. Support: For mobile app support, please send an email to: support.mechatronics@bonfiglioli.com Our Vision: We attract, develop and retain valuable people to make a difference. We empower them to build an effective organization to fulfill their potential. We focus on high performance and business excellence. We engineer dreams! This App is completely free of charge.
Screenshots
Verdict
The clearest difference is price: Drive Diagnostics at Free against Drill Calc's $2.99. Drive Diagnostics also leads on update cadence (every 6 months vs every 18 months). Drill Calc's advantage is iOS requirement (12.0 vs 14.0). 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
Drive Diagnostics is free to download; Drill Calc costs $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, Drive Diagnostics every 6 months. The most recent releases landed on October 31, 2026 and November 7, 2026 respectively.
| Parameter | Drill Calc | Drive Diagnostics |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 4.1 (19 ratings) — better | — |
| Positive reviews | 91.7% of reviews | — |
| Number of ratings | 19 — better | — |
| Update frequency | Every 18 months | Every 6 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 14.0 |
| Further details — not scored | ||
| Size | 5 MB | 9 MB |
| Age rating | 4+ | 4+ |
| Developer | Black Cat Systems | Bonfiglioli SPA |
In-app purchases
Drill Calc
No in-app purchases
Drive Diagnostics
No in-app purchases
Questions
Is Drill Calc free?
Is Drive Diagnostics free?
Do Drill Calc or Drive Diagnostics have ads?
Which is updated more often, Drill Calc or Drive Diagnostics?
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