# Arbitrium vs Protagonist

The clearest difference is update cadence: Protagonist at every 2 weeks against Arbitrium's every 28 months. Protagonist also leads on ratings volume (35 vs 11) and iOS requirement (12.0 vs 15.6). On price, rating, review sentiment and ads there is nothing between them.

Both are free to download. Arbitrium sells 1 one-off in-app purchase and Protagonist sells 1 in-app purchase, starting at $19.99 per year. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.9 for Arbitrium against 5.0 for Protagonist. Both are backed by a comparable volume of ratings — 11 and 35 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Arbitrium ships an update every 28 months, Protagonist every 2 weeks. The most recent releases landed on October 24, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | Arbitrium | Protagonist |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.9 (11 ratings)](https://appshunter.io/ios/app/arbitrium/id1369876075/reviews) | **[5.0 (35 ratings)](https://appshunter.io/ios/app/protagonist-decision-making/id1562381604/reviews)** |
| Number of ratings | 11 | **35** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 28 months | **Every 2 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 8 MB | 64 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [The Lost Project](https://appshunter.io/developer/380868134) | [Symbolic Frameworks, LLC](https://appshunter.io/developer/1527334602) |

## What reviewers say

### Arbitrium

[App page](https://appshunter.io/ios/app/arbitrium/id1369876075)

This app assists in making rational decisions by allowing you to define criteria and rate your options. It uses a weighted decision matrix to help you identify the best choice for various life scenarios.

**Highlights:** Define decision criteria, Rate available options, Weighted decision matrix, Identify best choice, Save and manage decisions

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PRO Mode | $0.99 | one-time |


### Protagonist

[App page](https://appshunter.io/ios/app/protagonist-decision-making/id1562381604)

This app provides a structured framework for individuals and teams to make better, more informed decisions and prioritize tasks effectively. It offers a visual process to deepen understanding and track important factors, fostering a collaborative and self-managing work culture.

**Highlights:** Structure decision-making factors for analysis, Clarify and visualize primary decision criteria, Share decisions for collaborative input, Prioritize projects and tasks with clear factors, Facilitate in-depth discussions, Generate decision proposals or reports

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sharing Subscription | $19.99 | per year |


## Frequently asked questions

### Is Arbitrium free?

Arbitrium is free to download, with in-app purchases available.

### Is Protagonist free?

Protagonist is free to download, with in-app purchases available.

### Which has better reviews, Arbitrium or Protagonist?

Protagonist is rated higher. Arbitrium averages 4.9 out of 5 from 11 ratings, while Protagonist averages 5.0 from 35 ratings.

### Do Arbitrium or Protagonist have ads?

Neither Arbitrium nor Protagonist shows ads.

### Which is updated more often, Arbitrium or Protagonist?

Arbitrium ships an update every 28 months, and Protagonist every 2 weeks. Most recently, Arbitrium was updated on October 24, 2026 and Protagonist on October 22, 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.*