# A2Calc vs Black Widow Key Machine V2

The clearest difference is review sentiment: A2Calc at 93% against Black Widow Key Machine V2's 0%. A2Calc also leads on rating (4.8 vs 3.0) and ratings volume (9 vs 2). Black Widow Key Machine V2's advantage is price (Free vs $6.99) and update cadence (monthly vs every 3 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Black Widow Key Machine V2 is free to download; A2Calc costs $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.

A2Calc holds the better App Store score, 4.8 against 3.0. Both are backed by a comparable volume of ratings — 9 and 2 respectively. Written reviews point the same way: 93% of A2Calc's written reviews are positive against 0% of Black Widow Key Machine V2's.

A2Calc ships an update every 3 months, Black Widow Key Machine V2 monthly. The most recent releases landed on September 8, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | A2Calc | Black Widow Key Machine V2 |
| --- | --- | --- |
| Price | $6.99 | **Free** |
| Rating | **[4.8 (9 ratings)](https://appshunter.io/ios/app/a2calc/id589583757/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/black-widow-key-machine-v2/id1600176672/reviews) |
| Number of ratings | **9** | 2 |
| Positive reviews | **93.3% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Monthly** |
| Monetization | Paid | **Free** |
| Size | 2 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

### A2Calc

[App page](https://appshunter.io/ios/app/a2calc/id589583757)

This app assists locksmiths by automatically calculating pinning charts for A2 SFIC systems. It supports 6 or 7 pin systems and includes features like a randomize function, control finder, and project saving. Projects are encrypted and can be shared via AirPrint or email.

**Highlights:** Automatic pinning chart calculation, Supports 6 or 7 pin systems, Randomize chart generation, Control Finder for lost control keys, Save up to 16 projects, Encrypted and passcode-protected projects, Share projects via AirPrint or email

**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 A2Calc free?

A2Calc costs $6.99, 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, A2Calc or Black Widow Key Machine V2?

A2Calc is rated higher. A2Calc averages 4.8 out of 5 from 9 ratings, while Black Widow Key Machine V2 averages 3.0 from 2 ratings.

### Do A2Calc or Black Widow Key Machine V2 have ads?

Neither A2Calc nor Black Widow Key Machine V2 shows ads.

### Which is updated more often, A2Calc or Black Widow Key Machine V2?

A2Calc ships an update every 3 months, and Black Widow Key Machine V2 monthly. Most recently, A2Calc was updated on September 8, 2026 and Black Widow Key Machine V2 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.*