# PP+ Force Vector Addition vs Physical Constants

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.

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.

## The numbers

| Metric | PP+ Force Vector Addition | Physical Constants |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | [3.3 (3 ratings)](https://appshunter.io/ios/app/pp-plus-force-vector-addition/id622367226/reviews) | [3.3 (3 ratings)](https://appshunter.io/ios/app/physical-constants-ml/id837679891/reviews) |
| Number of ratings | 3 | 3 |
| Positive reviews | **50.0% of reviews** | 33.3% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 16 months | **Every 9 months** |
| Monetization | Paid | **Ad-supported** |
| Size | 105 MB | 25 MB |
| Requires iOS | 18.0 | **12.0** |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Polyhedron Learning Media, Inc.](https://appshunter.io/developer/458882328) | [Takuya Ishikawa](https://appshunter.io/developer/468311118) |

## What reviewers say

### PP+ Force Vector Addition

[App page](https://appshunter.io/ios/app/pp-plus-force-vector-addition/id622367226)

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:** macOS Compatibility

**In-app purchases:** none


### Physical Constants

[App page](https://appshunter.io/ios/app/physical-constants-ml/id837679891)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*