# ServiceCalc vs Black Widow Key Machine V2

The clearest difference is review sentiment: ServiceCalc at 91% against Black Widow Key Machine V2's 0%. ServiceCalc also leads on rating (4.0 vs 3.0). Black Widow Key Machine V2's advantage is price (Free vs $0.99). On ratings volume, update cadence, ads and in-app purchases there is nothing between them.

Black Widow Key Machine V2 is free to download; ServiceCalc costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ServiceCalc holds the better App Store score, 4.0 against 3.0. Both are backed by a comparable volume of ratings — 4 and 2 respectively. Written reviews point the same way: 91% of ServiceCalc's written reviews are positive against 0% of Black Widow Key Machine V2's.

ServiceCalc ships an update every 2 months, Black Widow Key Machine V2 monthly. The most recent releases landed on October 10, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | ServiceCalc | Black Widow Key Machine V2 |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[4.0 (4 ratings)](https://appshunter.io/ios/app/servicecalc/id583666473/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/black-widow-key-machine-v2/id1600176672/reviews) |
| Number of ratings | **4** | 2 |
| Positive reviews | **90.9% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Monthly** |
| Monetization | Paid | **Free** |
| Size | 1 MB | 317 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Farren Domenici](https://appshunter.io/developer/583666476) | [Lock Labs, Inc.](https://appshunter.io/developer/1521325322) |

## What reviewers say

### ServiceCalc

[App page](https://appshunter.io/ios/app/servicecalc/id583666473)

This tool automates invoice calculations for service technicians, reducing errors and time spent. It handles labor, parts, tax, and totals, with features like a built-in timer and flashlight.

**Highlights:** Automated labor calculation, Parts/materials totaling, Configurable tax rates, Built-in timer, Flashlight function, Customizable skins

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

**In-app purchases:** none


### Black Widow Key Machine V2

[App page](https://appshunter.io/ios/app/black-widow-key-machine-v2/id1600176672)

This utility app allows locksmiths to cut various types of keys, including high-security, edge-cut, dimple, tibbe, and tubular blanks. It connects via Bluetooth to a mobile device for cutting keys by code, duplication, and progression.

**Highlights:** Cut high-security keys, Cut edge-cut keys, Cut dimple keys, Cut tibbe keys, Cut tubular keys, Bluetooth mobile connectivity, Cut by code, duplicate, and progression

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ServiceCalc free?

ServiceCalc costs $0.99, with no in-app purchases.

### Is Black Widow Key Machine V2 free?

Black Widow Key Machine V2 is free to download, with no in-app purchases.

### Which has better reviews, ServiceCalc or Black Widow Key Machine V2?

ServiceCalc is rated higher. ServiceCalc averages 4.0 out of 5 from 4 ratings, while Black Widow Key Machine V2 averages 3.0 from 2 ratings.

### Do ServiceCalc or Black Widow Key Machine V2 have ads?

Neither ServiceCalc nor Black Widow Key Machine V2 shows ads.

### Which is updated more often, ServiceCalc or Black Widow Key Machine V2?

ServiceCalc ships an update every 2 months, and Black Widow Key Machine V2 monthly. Most recently, ServiceCalc was updated on October 10, 2026 and Black Widow Key Machine V2 on October 2, 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.*