Comparison

A3Calc vs CodeMaster4

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

A3Calc

Features
Read full description

A3 Small Format Interchangeable Core Calculator (sister app of A2Calc and A4Calc) ---Programmed by a Locksmith, for Locksmiths--- Automatically calculates the pinning chart for A3 SFIC. Built for 6 or 7 pin systems, however, less can be achieved by using a decimal to erase a chamber. Minimum of a control and master key are required to make a chart. Additional change key available for all devices; 2 change keys available for 16:9 screen devices. Randomize function will generate completely random charts each time it is triggered. "Lock/Unlock" toggle disables/enables all inputs and functions to prevent unwanted/lost changes. Control Finder is an added bonus by reverse engineering a core to determine the control key's bitting. This is perfect when needing to remove multiple cores in a building when the control key has been lost. There are two methods for achieving the control key: 1. using the master, control, and bottom pins, or 2. using only the top/driver pins. Up to 16 different projects can be saved at any one given time. All projects are encrypted and protected with a passcode when stored on your device. All projects can be exported via AirPrint and Email. Compatibility: iPhone / iPod touch on iOS 8.0 or later and iPad on iOS 12.0 or later. Found a bug? Something not working? Have a suggestion? Feel free to contact me via email: farren@phoxlocks.com

About

CodeMaster4

Features
Read full description

CodeMaster4™ is a professional app designed for operating the MIRACLE™ key machine, offering professional locksmiths a range of features for efficient and user-friendly key cutting. The app enables professional locksmiths to cut and duplicate keys using an extensive collection of car, house, and special keys, while providing convenience features for seamless machine operation. Key features include: - An extensive key database covering car, motorbike, residential, and various specialized keys. - Simple and fast key cutting and duplication. - Customizable key cutting options to meet specific needs. - Easy creation and management of personal key data. - Wear correction feature for older key cylinders. - Favorites and history management for quick access to frequently used key data. - Machine management tools, including calibration, to ensure optimal performance. - Key marking function for easy identification. - Additional features for seamless operation of the MIRACLE™ key machine. ■ Supported Devices - Tablet PCs, Smartphones ■ Communication - Bluetooth LE(Wireless) ■ Screen Orientation - Tablet: Fixed Landscape Mode - Smartphone: Fixed Portrait Mode ■ Supported Languages - English - Korean (한국어) - Japanese (日本語) - Spanish (Español) - Portuguese(Português) ■ Supported MIRACLE™ Products - MIRACLE™-A9 Nova ■ Contact Us Redt Inc. www.iredt.com ▶ Customer Support Email: tech-support@iredt.com

Screenshots

A3Calc4 screens
CodeMaster44 screens

Verdict

The call

The clearest difference is price: CodeMaster4 at Free against A3Calc's $1.99. CodeMaster4 also leads on update cadence (fortnightly vs every 18 months). A3Calc's advantage is iOS requirement (12.0 vs 15.0). 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

CostPrice · In-app purchases · Ads · Monetization

CodeMaster4 is free to download; A3Calc costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

A3Calc ships an update every 18 months, CodeMaster4 fortnightly. Both last shipped on November 8, 2026.

Scorecard3 real differences · 3 level
A3Calc versus CodeMaster4: the parameters behind the verdict, then further details
ParameterA3CalcCodeMaster4
Price$1.99Free — better
Update frequencyEvery 18 monthsFortnightly — better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS12.0 — better15.0
Further details — not scored
Size2 MB203 MB
Age rating4+4+
DeveloperFarren DomeniciRedt Inc.

In-app purchases

None

A3Calc

No in-app purchases

None

CodeMaster4

No in-app purchases

Questions

Is A3Calc free?
A3Calc costs $1.99, with no in-app purchases.
Is CodeMaster4 free?
CodeMaster4 is free to download, with no in-app purchases.
Do A3Calc or CodeMaster4 have ads?
Neither A3Calc nor CodeMaster4 shows ads.
Which is updated more often, A3Calc or CodeMaster4?
A3Calc ships an update every 18 months, and CodeMaster4 fortnightly. Most recently, A3Calc was updated on November 8, 2026 and CodeMaster4 on November 8, 2026.

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