# PP+ Force Vector Addition vs iCTF

The clearest difference is update cadence: iCTF at every 2 months against PP+ Force Vector Addition's every 16 months. iCTF also leads on device support (3 vs 1) and iOS requirement (13.0 vs 18.0). PP+ Force Vector Addition's advantage is price ($1.99 vs $3.99). On ads and in-app purchases there is nothing between them.

PP+ Force Vector Addition costs $1.99 and iCTF $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

PP+ Force Vector Addition ships an update every 16 months, iCTF every 2 months. The most recent releases landed on September 23, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | PP+ Force Vector Addition | iCTF |
| --- | --- | --- |
| Price | **$1.99** | $3.99 |
| Rating | **[3.3 (3 ratings)](https://appshunter.io/ios/app/pp-plus-force-vector-addition/id622367226/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 16 months | **Every 2 months** |
| Monetization | Paid | — |
| Size | 105 MB | 24 MB |
| Requires iOS | 18.0 | **13.0** |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Polyhedron Learning Media, Inc.](https://appshunter.io/developer/458882328) | [Jeremy Laratro](https://appshunter.io/developer/1864044207) |

## 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


### iCTF

[App page](https://appshunter.io/ios/app/ictf/id6756991047)

**Features:** macOS Compatibility

**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 iCTF free?

iCTF costs $3.99, with no in-app purchases.

### Do PP+ Force Vector Addition or iCTF have ads?

Neither PP+ Force Vector Addition nor iCTF shows ads.

### Which is updated more often, PP+ Force Vector Addition or iCTF?

PP+ Force Vector Addition ships an update every 16 months, and iCTF every 2 months. Most recently, PP+ Force Vector Addition was updated on September 23, 2026 and iCTF on September 30, 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.*