A3Calc vs Construction Calculator+
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
A3Calc
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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
Construction Calculator+
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Construction Calculator is your all-in-one solution for construction-related calculations and estimates. Key Features: • Area Calculations: Calculate square footage for floors, walls, and surfaces • Volume Measurements: Determine concrete, gravel, and other material volumes • Material Estimator: Calculate quantities for common building materials • Metric/Imperial Units: Easy conversion between measurement systems Perfect for: - Contractors - Architects - DIY Enthusiasts - Construction Managers - Home Renovators - Building Material Suppliers Simple, accurate, and user-friendly - your essential construction calculation companion.
Screenshots
Verdict
The clearest difference is ads: A3Calc at none against Construction Calculator+'s shown. On price, update cadence, 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
A3Calc costs $1.99 and Construction Calculator+ $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
A3Calc ships an update every 18 months, Construction Calculator+ every 10 months. The most recent releases landed on September 30, 2026 and September 29, 2026 respectively.
| Parameter | A3Calc | Construction Calculator+ |
|---|---|---|
| Price | $1.99 | $1.99 |
| Update frequency | Every 18 months | Every 10 months — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 12.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 2 MB | 22 MB |
| Age rating | 4+ | 4+ |
| Developer | Farren Domenici | JanoGroup LLC |
In-app purchases
A3Calc
No in-app purchases
Construction Calculator+
No in-app purchases
Questions
Is A3Calc free?
Is Construction Calculator+ free?
Do A3Calc or Construction Calculator+ have ads?
Which is updated more often, A3Calc or Construction Calculator+?
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