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.
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.
- 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
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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.
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.
- Physical constants database
- Categorized by topic
- Search functionality
- Multi-language support
- User feedback for corrections
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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
Verdict
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
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.
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.
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.
| Parameter | PP+ Force Vector Addition | Physical Constants |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | 3.3 (3 ratings) | 3.3 (3 ratings) |
| Positive reviews | 50.0% of reviews — better | 33.3% of reviews |
| Number of ratings | 3 | 3 |
| Update frequency | Every 16 months | Every 9 months — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Paid | Ad-supported — better |
| Devices | iPad | iPhone, iPad, iPod — better |
| Requires iOS | 18.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 105 MB | 25 MB |
| Age rating | 4+ | 4+ |
| Developer | Polyhedron Learning Media, Inc. | Takuya Ishikawa |
Customer experience
PP+ Force Vector Addition
Physical Constants
In-app purchases
PP+ Force Vector Addition
No in-app purchases
Physical Constants
No in-app purchases
Questions
Is PP+ Force Vector Addition free?
Is Physical Constants free?
Which has better reviews, PP+ Force Vector Addition or Physical Constants?
Do PP+ Force Vector Addition or Physical Constants have ads?
Which is updated more often, PP+ Force Vector Addition or Physical Constants?
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