Comparison

SCR MAXFLO™ vs Voltage Drop Calculator.

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

Head to head
About

SCR MAXFLO™

This app calculates pressure drop, fluid velocity, Reynold's number, and friction factor for liquids and gases. It allows users to create custom projects, manage pipes, fluids, and fittings, and supports both metric and imperial units for efficient on-site work.

Highlights
  • Pressure drop calculation
  • Fluid velocity calculation
  • Reynold's number calculation
  • Friction factor calculation
  • Custom project creation
  • Pipe, fluid, and fitting management
  • Metric and imperial unit support
Features
Read full description

The SCR MAXFLO™ App calculates pressure drop, fluid velocity, Reynold’s number, and friction factor for both liquid and gas. Other features include the ability to create custom projects as well as the ability to add and edit pipes, fluids, and fittings. Need to work in metric and imperial units? The SCR MAXFLO™ App has you covered. From changing pipe size on the fly to sharing your calculations with other users, the SCR MAXFLO™ App can help you work quickly and efficiently on any job site.

About

Voltage Drop Calculator.

Calculate voltage drop and wire size using both NEC and IEC standards. Supports various load types, conductor materials, and system configurations. Generates detailed reports for electricians, engineers, and contractors.

Highlights
  • NEC and IEC dual standards
  • Voltage drop and wire sizing calculations
  • Support for continuous load and corrections
  • Copper or Aluminum conductor options
  • Single-phase and three-phase systems
  • Automatic compliance checks
  • PDF report generation
Features
Read full description

Perform accurate Voltage Drop and Wire Sizing calculations for both NEC® (National Electrical Code) and IEC standards. Built for electricians, engineers, and contractors who need reliable results on the go. Voltage Drop Calculator • Dual standards: Switch between NEC (AWG/Imperial) and IEC (mm²/Metric) • Enter voltage, current, run length, and power factor • Supports continuous load (125%), grouping, and ambient temperature corrections • Copper or Aluminum conductors for single-phase and three-phase systems • Detailed results including ampacity, derating, voltage drop, and load voltage • Automatic compliance checks (e.g., ≤ 3% for branch circuits) Wire Size Calculator (Reverse) • Calculates required wire size for a target voltage drop % • Suggests optimal AWG, kcmil, or mm² • Uses NEC Chapter 9, Table 9 (AC impedance) with DC fallback Professional Tools • Wire converter (AWG/kcmil ↔ mm²) • Generate and share PDF reports • Handy electrical formula cards • Localized in English, Spanish, French, German, Italian, Dutch, Portuguese, and Chinese

Screenshots

SCR MAXFLO™4 screens
Voltage Drop Calculator.4 screens

Verdict

The call

The clearest difference is in-app purchases: SCR MAXFLO™ at none against Voltage Drop Calculator.'s 1. SCR MAXFLO™ also leads on ads (none vs shown). Voltage Drop Calculator.'s advantage is ratings volume (413 vs 5) and update cadence (every 3 months vs every 11 months). On price, rating, device support and iOS requirement 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

Both are free to download. Voltage Drop Calculator. sells 1 one-off in-app purchase. SCR MAXFLO™ asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.6 for SCR MAXFLO™ against 4.6 for Voltage Drop Calculator.. That said, the two scores are not equally well evidenced: Voltage Drop Calculator. has 413 ratings behind it against 5, so its average is the more settled of the two.

UpkeepUpdate frequency

SCR MAXFLO™ ships an update every 11 months, Voltage Drop Calculator. every 3 months. The most recent releases landed on November 6, 2026 and November 2, 2026 respectively.

Scorecard5 real differences · 5 level
SCR MAXFLO™ versus Voltage Drop Calculator.: the parameters behind the verdict, then further details
ParameterSCR MAXFLO™Voltage Drop Calculator.
PriceFreeFree
Rating4.6 (5 ratings)4.6 (413 ratings) — better
Positive reviews—33.3% of reviews
Number of ratings5413 — better
Update frequencyEvery 11 monthsEvery 3 months — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhoneiPhone, iPad — better
Requires iOS16.6 — better17.6
Further details — not scored
Size7 MB51 MB
Age rating4+4+
DeveloperSouthwire CompanyV PUGAZHENTHI

Customer experience

SCR MAXFLO™

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Voltage Drop Calculator.

All ratings414 ratings
Positive89.9%
Neutral4.1%
Negative6.0%
Written reviews12 reviews
Positive33.3%
Neutral8.3%
Negative58.3%

In-app purchases

None

SCR MAXFLO™

No in-app purchases

1 purchases

Voltage Drop Calculator.

One-time1
  • Go Pro$4.99

Questions

Is SCR MAXFLO™ free?
SCR MAXFLO™ is free to download, with no in-app purchases.
Is Voltage Drop Calculator. free?
Voltage Drop Calculator. is free to download, with in-app purchases available.
Which has better reviews, SCR MAXFLO™ or Voltage Drop Calculator.?
Voltage Drop Calculator. is rated higher. SCR MAXFLO™ averages 4.6 out of 5 from 5 ratings, while Voltage Drop Calculator. averages 4.6 from 413 ratings.
Do SCR MAXFLO™ or Voltage Drop Calculator. have ads?
Voltage Drop Calculator. shows ads; SCR MAXFLO™ does not.
Which is updated more often, SCR MAXFLO™ or Voltage Drop Calculator.?
SCR MAXFLO™ ships an update every 11 months, and Voltage Drop Calculator. every 3 months. Most recently, SCR MAXFLO™ was updated on November 6, 2026 and Voltage Drop Calculator. on November 2, 2026.

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