Comparison

PP+ Force Vector Addition vs Physical Constants

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

Head to head
About

PP+ Force Vector Addition

This educational app simulates a force table experiment for investigating vector addition of forces. It provides realistic data with errors, analysis tools, and supporting materials for students to conduct virtual physics labs.

Highlights
  • 3D force table simulation
  • Realistic experimental data with errors
  • Introductory videos and background theory
  • Analysis and reporting tools
  • Pre-lab quiz and post-lab questions
  • Teacher support materials
Features
Read full description

The Addition of Force Vectors lab uses a force table to investigate the vector addition of forces. It is part of Polyhedron Physics Plus, a set of 24 iPad apps for use in the classroom. To see how they work, try the FREE PP+ Newton’s 2nd Law lab. For those who’d prefer to develop their own experiments, the PP Force Table app features a similar apparatus without lab procedures and other supporting materials. In addition to a 3D simulation that produces realistic data, each lab includes introductory videos, background theory, experimental procedure, analysis and reporting tools, pre-lab quiz, post-lab questions, and teacher support materials. The experimental data produced by the simulations are realistic, including random and systematic errors. These features allow students to use standard data analysis and error analysis techniques to report on their own unique data, just as if the experiment had been performed using hands-on equipment. These labs can serve as replacements for hands-on labs, especially when equipment is not available, or as supplements to hands-on labs. They are also a suitable option for students in distance learning and home school situations. Formative and summative evaluations showed no significant difference in learning between students using the virtual labs and those using hands-on labs. Preliminary results suggest increased learning by students using the virtual labs as supplements to hands-on. Polyhedron Physics was developed by Polyhedron Learning Media, Inc. with partial funding provided under contract numbers ED-07-CO-0040 and ED-IES-11-C-0029 from the Institute of Education Sciences in the U.S. Department of Education through the Small Business Innovation Research (SBIR) program.

About

Physical Constants

Access a comprehensive list of physical constants, organized by category for easy searching. This app supports all AppStore languages and allows users to report corrections via email.

Highlights
  • Physical constants database
  • Categorized by topic
  • Search functionality
  • Multi-language support
  • User feedback for corrections
Features
Read full description

Application that displays the physical constants. Classified by category, easy to search. Supports all languages ​​in the AppStore. If you find something to be corrected, please send an E-mail (English or Japanese).

Screenshots

Physical Constants2 screens

Verdict

The call

The clearest difference is price: Physical Constants at Free against PP+ Force Vector Addition's $1.99. Physical Constants also leads on device support (3 vs 1) and iOS requirement (12.0 vs 18.0). PP+ Force Vector Addition's advantage is ads (none vs shown) and review sentiment (50% vs 33%). On rating, ratings volume, update cadence and in-app purchases 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

Physical Constants is free to download; PP+ Force Vector Addition 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 — 3.3 for PP+ Force Vector Addition against 3.3 for Physical Constants. Both are backed by a comparable volume of ratings — 3 and 3 respectively. Written reviews are what separate them: 50% of PP+ Force Vector Addition's written reviews are positive against 33% of Physical Constants's.

UpkeepUpdate frequency

PP+ Force Vector Addition ships an update every 16 months, Physical Constants every 9 months. The most recent releases landed on September 23, 2026 and October 2, 2026 respectively.

Scorecard6 real differences · 4 level
PP+ Force Vector Addition versus Physical Constants: the parameters behind the verdict, then further details
ParameterPP+ Force Vector AdditionPhysical Constants
Price$1.99Free — better
Rating3.3 (3 ratings)3.3 (3 ratings)
Positive reviews50.0% of reviews — better33.3% of reviews
Number of ratings33
Update frequencyEvery 16 monthsEvery 9 months — better
AdsNo — betterYes
In-app purchasesNoNo
MonetizationPaidAd-supported — better
DevicesiPadiPhone, iPad, iPod — better
Requires iOS18.012.0 — better
Further details — not scored
Size105 MB25 MB
Age rating4+4+
DeveloperPolyhedron Learning Media, Inc.Takuya Ishikawa

Customer experience

PP+ Force Vector Addition

All ratings3 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews2 reviews
Positive50.0%
Neutral50.0%
Negative0.0%

Physical Constants

All ratings3 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews3 reviews
Positive33.3%
Neutral0.0%
Negative66.7%

In-app purchases

None

PP+ Force Vector Addition

No in-app purchases

None

Physical Constants

No in-app purchases

Questions

Is PP+ Force Vector Addition free?
PP+ Force Vector Addition costs $1.99, with no in-app purchases.
Is Physical Constants free?
Physical Constants is free to download, with no in-app purchases.
Which has better reviews, PP+ Force Vector Addition or Physical Constants?
PP+ Force Vector Addition and Physical Constants are both rated 3.3 out of 5 on the App Store, from 3 and 3 ratings respectively.
Do PP+ Force Vector Addition or Physical Constants have ads?
Physical Constants shows ads; PP+ Force Vector Addition does not.
Which is updated more often, PP+ Force Vector Addition or Physical Constants?
PP+ Force Vector Addition ships an update every 16 months, and Physical Constants every 9 months. Most recently, PP+ Force Vector Addition was updated on September 23, 2026 and Physical Constants on October 2, 2026.

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