Comparison

Arbitrium vs Protagonist

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Arbitrium

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
Read full description

We often have to take decisions. Arbitrium is an app that will help you take the right one in a simple and rational way. Establish the criteria you need to consider and then rate each option you have available. The option with the highest score will be the best one. Arbitrium is based on the weighted decision matrix concept and will help you take decisions such as: Which car should I buy? Which bank should I choose for a mortgage? Where should I go on vacation? Which job offer should I accept? Which nursery should I choose for my child?

About

Protagonist

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
Read full description

Protagonist is designed to improve a company’s collaborative skill around decision making and prioritization. It gives individuals and teams a framework for making more informed decisions and for setting their own priorities more quickly and effectively. Within minutes of logging in, you can begin getting value out of Protagonist by setting up an important decision or creating a list of projects or steps to prioritize- using either the mobile app or web version of the app. A LITTLE STRUCTURE GOES A LONG WAY Important decisions are often poorly made despite the time spent considering them - particularly group decisions, because there is a lack of structure in the process. Often we make even important decisions with little structure… We all know the drill: we go around the room, debate a few points, often superficially (or sometimes one point to the exclusion of others), bring evidence in spurts and starts, discount or even forget certain criteria. In the end, we often make poor decisions because without a road map and a record of our thinking – our minds aren’t able to digest and process and hold on to all the factors. Protagonist provides a lightweight framework for a clear, visual process that can be used to deepen understanding and keep track of what is most important through a decision making process. STIMULATING A CREATIVE, SELF-MANAGING CULTURE People often have ideas at work, but get stuck because they aren’t sure how to bring them forward, or where they fit in the overall picture of the company’s priorities. Protagonist gives a whole team the ability to assess their ideas against other ideas before they bring them forward, improve them where they are weak, and bring them forward in a professional way. PROTAGONIST’S FEATURES... - Structure the factors in a decision-making process so that they can be more carefully analyzed. - Make the primary criteria for a decision clear and transparent and help assure each factor is given proper weight by visualizing it. - Share decisions and let others provide their perspective, creating a shared playing field and a visual way of relating to the decision. - Prioritize projects, steps to take, problems to solve - using a clear set of factors. - Provide a basis for effective discussion - going deeper rather than just wider as a decision is made. - Help make a decision understandable to others and help them have confidence in the decision once it is finalized. - Create a proposal or report based on the information behind the decision. The web version is available at https://protag.app. Enjoy

Screenshots

Arbitrium4 screens
Protagonist4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard3 real differences · 7 level
Arbitrium versus Protagonist: the parameters behind the verdict, then further details
ParameterArbitriumProtagonist
PriceFreeFree
Rating4.9 (11 ratings)5.0 (35 ratings) — better
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings1135 — better
Update frequencyEvery 28 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.612.0 — better
Further details — not scored
Size8 MB64 MB
Age rating4+4+
DeveloperThe Lost ProjectSymbolic Frameworks, LLC

Customer experience

Arbitrium

All ratings11 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews10 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Protagonist

All ratings35 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews10 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

Arbitrium

One-time1
  • PRO Mode$0.99
1 purchases

Protagonist

Subscriptions1
  • Sharing Subscription$19.991 Year

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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