Comparison

CableCalc BS7671 vs SAGE® by Armstrong

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

Head to head
About

CableCalc BS7671

This application performs comprehensive electrical cable calculations compliant with BS7671:2018(2024) standards. It checks for voltage drop, disconnection time, fault current, and overload data, generating detailed PDF reports. Supports single and three-phase calculations for various circuit types and includes extensive cable databases.

Highlights
  • BS7671:2018(2024) compliant calculations
  • Voltage drop, disconnection time, fault current checks
  • Single and three-phase calculations
  • Radial, ring, and sub main circuits
  • Detailed PDF report generation
  • Extensive cable and protective device database
  • Correction factor application
Read full description

CableCalc BS7671 is a cable evaluation program fully compliant with BS7671:2018(2024) Requirements for Electrical Installations IEE Wiring Regulations 18th Edition based on IEC/CENELEC Standards. Following the success of previous releases of CableCalc BS7671 over the past 20 years, CableCalc BS7671 has been re-designed for the iPad to provide a intuitive user interface with all the comprehensive features of the Windows software. CableCalc BS7671 will calculate and check for voltage drop, disconnection time, fault current, earth fault data, overload and short circuit data and will produce a detailed print-out for each calculation in PDF format which can be printed to an AirPort compatible printer or emailed. CableCalc BS7671 will perform both single and three-phase calculations for radial, ring and sub main circuits. CableCalc includes a full database of copper cables and generic protective devices and allows you to complete all information relevant to the calculation including any applicable correction factors for temperature, grouping etc. Energy let through values can be entered and calculations can be saved to load back in later. Cable types include: 70°C PVC Armoured & Non Armoured multicore & singles, Twin & earth, 6491x & 6181y Singles 90°C LSF Armoured singles & multicore, 6491b & 6181 Singles, Twin & earth, Flat 3 core & earth 90°C XLPE Armoured & Non Armoured singles & Multicore, 6491b & 6181xy singles FP100, FP200, FP200 Flex, FP400 and Fireforce PH30 Fire rated MICC PVC Sheath/Bare, Heavy & Light Duty CY, SY, YY 70°C PVC Flexible cable, 105°C Tri-Rated singles 60 & 90°C Rubber insulated flexible cable CableCalc is available in the english language only and all cable sizes are metric (mm). BS7671 is the standard for wiring regulations in the United Kingdom.

About

SAGE® by Armstrong

Manage steam traps and digital domestic hot water systems with this native Apple application. Perform surveys offline, connect directly to compatible devices via Bluetooth, and sync data to the cloud when a network is available.

Highlights
  • Steam trap surveys
  • Digital hot water system management
  • Offline data collection
  • Bluetooth (BLE) device communication
  • Real-time monitoring
  • Alarm configuration
Features
Read full description

Survey your steam traps and manage your digital domestic hot water system with efficiency and accuracy using the free, native Apple application included with SAGE®. SAGE® Mobile enables you to perform steam trap surveys with your iPhone, iPad or iTouch device—even when no Internet connection is available. It includes our Squares Condition Screen, and an intuitive user interface that provides the quickest way to manually update the condition of your traps. SAGE® Mobile saves you time and increases accuracy as it quickly gathers your data and stores it locally, automatically pushing it to SAGE® as soon as you have access to a network connection. SAGE® Mobile allows for direct Bluetooth (BLE) communication with The Brain® DRV25 with no programming or other equipment required, just your smartphone device. SAGE® Mobile also provides a direct connection to SAGE® if a paid subscriber. The SAGE® Mobile App allows users to BLE connect to the product to monitor real time temperatures, adjust setpoints, configure alarm settings and perform thermal disinfection. Users also get error message notification and history. SAGE® subscribers have all the direct BLE connectivity features plus the ability to remotely change settings via their secure SAGE® network connection.

Screenshots

SAGE® by Armstrong4 screens

Verdict

The call

The clearest difference is price: SAGE® by Armstrong at Free against CableCalc BS7671's $149.99. SAGE® by Armstrong also leads on update cadence (every 2 months vs every 23 months). CableCalc BS7671's advantage is iOS requirement (9.0 vs 16.6). 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

SAGE® by Armstrong is free to download; CableCalc BS7671 costs $149.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

CableCalc BS7671 ships an update every 23 months, SAGE® by Armstrong every 2 months. Both last shipped on November 6, 2026.

Scorecard4 real differences · 6 level
CableCalc BS7671 versus SAGE® by Armstrong: the parameters behind the verdict, then further details
ParameterCableCalc BS7671SAGE® by Armstrong
Price$149.99Free — better
Rating—4.4 (22 ratings) — better
Positive reviews50.0% of reviews—
Number of ratings—22 — better
Update frequencyEvery 23 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPadiPhone, iPad — better
Requires iOS9.0 — better16.6
Further details — not scored
Size2 MB55 MB
Age rating4+4+
DeveloperCastline SystemsArmstrong International, Inc.

Customer experience

CableCalc BS7671

Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

SAGE® by Armstrong

All ratings22 ratings
Positive81.8%
Neutral4.5%
Negative13.6%

In-app purchases

None

CableCalc BS7671

No in-app purchases

None

SAGE® by Armstrong

No in-app purchases

Questions

Is CableCalc BS7671 free?
CableCalc BS7671 costs $149.99, with no in-app purchases.
Is SAGE® by Armstrong free?
SAGE® by Armstrong is free to download, with no in-app purchases.
Do CableCalc BS7671 or SAGE® by Armstrong have ads?
Neither CableCalc BS7671 nor SAGE® by Armstrong shows ads.
Which is updated more often, CableCalc BS7671 or SAGE® by Armstrong?
CableCalc BS7671 ships an update every 23 months, and SAGE® by Armstrong every 2 months. Most recently, CableCalc BS7671 was updated on November 6, 2026 and SAGE® by Armstrong on November 6, 2026.

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