Comparison

Phase Calc vs NMPP Operations

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

Head to head
About

Phase Calc

This advanced engineering app performs complex electrical calculations for three-phase power systems. It offers tools for students, technicians, and engineers to analyze unbalanced systems, perform sequence transformations, and access reference libraries. Results can be easily exported for documentation and sharing.

Highlights
  • Symmetrical component analysis
  • Three-phase power system calculations
  • Phase-to-sequence and sequence-to-phase transformations
  • Polar and rectangular input support
  • Specialized calculators and reference libraries
  • Exportable results for documentation
Features
Read full description

Phase Calc for iOS is an advanced engineering app for most electrical designs, expecially symmetrical component analysis and three-phase power system calculations. Built for students, teachers, technicians, and engineers, it combines a polished mobile experience with a powerful technical workflow for fast, accurate analysis of unbalanced three-phase systems in the field, lab, or classroom. The app performs both phase-to-sequence and sequence-to-phase transformations, with support for inputs in polar and rectangular form. It quickly resolves three unbalanced phase quantities into their positive-, negative-, and zero-sequence components, making it a practical tool for protection studies, fault analysis, system modeling, relay validation, and coursework. More than a single-purpose calculator, Phase Calc is packed with specialized calculators, technical reference libraries, and built-in formulas to support everyday power systems work. Whether you are checking values, reviewing theory, or working through engineering problems more efficiently, the app puts essential tools in one place. Results can be exported instantly, including vector data for plotting and graphical analysis, as well as technical report exports for documentation, review, and sharing. With powerful capabilities in a streamlined interface, Phase Calc delivers a complete mobile toolkit for three-phase analysis on iPhone and iPad.

About

NMPP Operations

This app facilitates mutual aid requests by connecting users with a coordinator for equipment and personnel needs. It also allows for quick reporting of system outages and notification of municipal generation operations to stakeholders.

Highlights
  • Mutual aid request submission
  • Direct contact with coordinator
  • System outage reporting
  • Generation notification
  • Resource tracking
Features
Read full description

For mutual aid requests this will allow the user to contact the NMPP Mutual Aid Coordinator either via a phone call or by submitting a request. In a circumstance where the user does not have time to specify what equipment and personnel they specifically need, they can explain it to the coordinator. When they do use the submittal request, the coordinator will know what resources to locate prior to reaching back out to the community in need. For those who experience a system outage in their community, they will be able to quickly report this with one touch of a button and the application will pass along the location of the outage to the necessary individuals. This will allow NMPP personnel to track these events and complete the necessary follow up steps. The Generation Notification selection allows the user to notify NMPP and TEA that they are operating their municipal generation and why they are doing so. This communication provides the necessary notice so stakeholders can make adjustments to day ahead and real time operations and so steps can be taken to ensure environmental tracking and financial settlements are performed.

Screenshots

Phase Calc4 screens
NMPP Operations4 screens

Verdict

The call

The clearest difference is price: NMPP Operations at Free against Phase Calc's $1.99. NMPP Operations also leads on iOS requirement (14.1 vs 17.0). Phase Calc's advantage is update cadence (every 6 weeks vs every 10 months) and ratings volume (4 vs 1). On rating, 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

NMPP Operations is free to download; Phase Calc costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Phase Calc against 5.0 for NMPP Operations. Both are backed by a comparable volume of ratings — 4 and 1 respectively.

UpkeepUpdate frequency

Phase Calc ships an update every 6 weeks, NMPP Operations every 10 months. The most recent releases landed on October 15, 2026 and October 2, 2026 respectively.

Scorecard5 real differences · 5 level
Phase Calc versus NMPP Operations: the parameters behind the verdict, then further details
ParameterPhase CalcNMPP Operations
Price$1.99Free — better
Rating5.0 (4 ratings)5.0 (1 ratings)
Positive reviews100.0% of reviews—
Number of ratings4 — better1
Update frequencyEvery 6 weeks — betterEvery 10 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.014.1 — better
Further details — not scored
Size13 MB110 MB
Age rating4+4+
DeveloperDonnie HermanNebraska Municipal Power Pool

Customer experience

Phase Calc

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews5 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

NMPP Operations

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Phase Calc

No in-app purchases

None

NMPP Operations

No in-app purchases

Questions

Is Phase Calc free?
Phase Calc costs $1.99, with no in-app purchases.
Is NMPP Operations free?
NMPP Operations is free to download, with no in-app purchases.
Which has better reviews, Phase Calc or NMPP Operations?
Phase Calc and NMPP Operations are both rated 5.0 out of 5 on the App Store, from 4 and 1 ratings respectively.
Do Phase Calc or NMPP Operations have ads?
Neither Phase Calc nor NMPP Operations shows ads.
Which is updated more often, Phase Calc or NMPP Operations?
Phase Calc ships an update every 6 weeks, and NMPP Operations every 10 months. Most recently, Phase Calc was updated on October 15, 2026 and NMPP Operations on October 2, 2026.

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