# PP+ Force Vector Addition vs Kattalo

The clearest difference is price: Kattalo at Free against PP+ Force Vector Addition's $1.99. Kattalo also leads on update cadence (every 9 days vs every 16 months) and iOS requirement (15.0 vs 18.0). On ads, in-app purchases and device support there is nothing between them.

Kattalo 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.

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

## The numbers

| Metric | PP+ Force Vector Addition | Kattalo |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| 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 9 days** |
| Monetization | Paid | — |
| Size | 105 MB | 64 MB |
| Requires iOS | 18.0 | **15.0** |
| Devices | iPad | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Polyhedron Learning Media, Inc.](https://appshunter.io/developer/458882328) | [Kattalo AB](https://appshunter.io/developer/1530561419) |

## 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


### Kattalo

[App page](https://appshunter.io/ios/app/kattalo/id1530561417)

**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 Kattalo free?

Kattalo is free to download, with no in-app purchases.

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

Neither PP+ Force Vector Addition nor Kattalo shows ads.

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

PP+ Force Vector Addition ships an update every 16 months, and Kattalo every 9 days. Most recently, PP+ Force Vector Addition was updated on September 23, 2026 and Kattalo 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.*