Comparison

Phase Calc vs Vector Calculator Plus

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

Vector Calculator Plus

This app simplifies vector addition for students and educators. It allows for quick calculations of multiple vectors, visualizing the results with generated graphs. Users can customize graph elements and save images for later use.

Highlights
  • Instant vector calculation
  • Add multiple vectors by x, y, magnitude, or angle
  • Generate vector images
  • Save vector images to camera roll
  • Customize graph display options
  • Set background color for graphs
Features
Read full description

Vector Calculator is math calculator to find vector addition fast and easy. Vector Calculator give operation of adding two or more vectors together into a vector sum. The parallelogram law gives the rule for vector addition of two or more vectors. Features: • Instant vector calculation. • Add multiple vector by x, y, magnitude or angle. • Vector Image is generated upon calculation. • Save Vector Image into camera roll. • Option to show/hide Grid, Indicator, Label, Vector Label or Magnitude Label for Vector Graph. • Option to enable/disable Background for Vector Graph. • Option to set Background Colour for Vector Graph. A Vector has magnitude [size] and direction. No matter which order you add them, you will get the same result. Magnitude of a Vector: The magnitude of a vector is shown by two vertical bars on either side of the vector |a| Adding Vectors: Vectors can add by adding the x parts and adding the y parts: Example: add the vectors a = (2,3) and b = (4,5) |a+b| = |a| + |b| |a+b| = (2,3) + (4,5) = (2+4,3+5) = (6,8) Common examples of vectors are force and velocity. Both force and velocity are in a particular direction. The magnitude of the vector would indicate the strength of the force or the speed associated with the velocity. Vector Calculator is useful for math teachers, educator, or anyone who want to prepare vector math material for teaching. Also for students who need to learn more detail or understanding of math vector addition operation. Thanks for your support and do visit nitrio.com for more apps for your iOS devices.

Screenshots

Phase Calc4 screens
Vector Calculator Plus4 screens

Verdict

The call

The clearest difference is review sentiment: Phase Calc at 100% against Vector Calculator Plus's 0%. Phase Calc also leads on rating (5.0 vs 2.5) and update cadence (every 6 weeks vs every 43 months). Vector Calculator Plus's advantage is iOS requirement (13 vs 17.0). On ratings volume, ads, in-app purchases and monetization model 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

Phase Calc costs $1.99 and Vector Calculator Plus $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Phase Calc holds the better App Store score, 5.0 against 2.5. Both are backed by a comparable volume of ratings — 4 and 2 respectively. Written reviews point the same way: 100% of Phase Calc's written reviews are positive against 0% of Vector Calculator Plus's.

UpkeepUpdate frequency

Phase Calc ships an update every 6 weeks, Vector Calculator Plus every 43 months. The most recent releases landed on August 1, 2026 and September 25, 2026 respectively.

Scorecard5 real differences · 5 level
Phase Calc versus Vector Calculator Plus: the parameters behind the verdict, then further details
ParameterPhase CalcVector Calculator Plus
Price$1.99 — better$2.99
Rating5.0 (4 ratings) — better2.5 (2 ratings)
Positive reviews100.0% of reviews — better0.0% of reviews
Number of ratings4 — better2
Update frequencyEvery 6 weeks — betterEvery 43 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.013 — better
Further details — not scored
Size13 MB1 MB
Age rating4+4+
DeveloperDonnie HermanHeng Jia Liang

Customer experience

Phase Calc

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

Vector Calculator Plus

All ratings2 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

Phase Calc

No in-app purchases

None

Vector Calculator Plus

No in-app purchases

Questions

Is Phase Calc free?
Phase Calc costs $1.99, with no in-app purchases.
Is Vector Calculator Plus free?
Vector Calculator Plus costs $2.99, with no in-app purchases.
Which has better reviews, Phase Calc or Vector Calculator Plus?
Phase Calc is rated higher. Phase Calc averages 5.0 out of 5 from 4 ratings, while Vector Calculator Plus averages 2.5 from 2 ratings.
Do Phase Calc or Vector Calculator Plus have ads?
Neither Phase Calc nor Vector Calculator Plus shows ads.
Which is updated more often, Phase Calc or Vector Calculator Plus?
Phase Calc ships an update every 6 weeks, and Vector Calculator Plus every 43 months. Most recently, Phase Calc was updated on August 1, 2026 and Vector Calculator Plus on September 25, 2026.

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