# Drill Calc vs MTX Softphone

The clearest difference is price: MTX Softphone at Free against Drill Calc's $2.99. Drill Calc's advantage is device support (3 vs 1) and iOS requirement (12.0 vs 16.0). On update cadence, ads and in-app purchases there is nothing between them.

MTX Softphone 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, MTX Softphone every 12 months. The most recent releases landed on October 31, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Drill Calc | MTX Softphone |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[4.1 (19 ratings)](https://appshunter.io/ios/app/drill-calc/id304434324/reviews)** | — |
| Number of ratings | **19** | — |
| Positive reviews | 91.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 18 months | **Every 12 months** |
| Monetization | Paid | — |
| Size | 5 MB | 97 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Black Cat Systems](https://appshunter.io/developer/301047032) | [MTX CLOUD SERVICES LIMITED](https://appshunter.io/developer/1699370451) |

## 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


### MTX Softphone

[App page](https://appshunter.io/ios/app/mtx-softphone/id6453476528)

**In-app purchases:** none


## Frequently asked questions

### Is Drill Calc free?

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

### Is MTX Softphone free?

MTX Softphone is free to download, with no in-app purchases.

### Do Drill Calc or MTX Softphone have ads?

Neither Drill Calc nor MTX Softphone shows ads.

### Which is updated more often, Drill Calc or MTX Softphone?

Drill Calc ships an update every 18 months, and MTX Softphone every 12 months. Most recently, Drill Calc was updated on October 31, 2026 and MTX Softphone on November 3, 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.*