R-MAP Crux
Decide, or learn why not yet
About
This app helps you make better decisions by analyzing options against uncertainties. It first checks for dominance, then quantifies the value of gathering more information before considering your risk tolerance. It provides a clear verdict on whether to decide now or wait.
What's New in R
1.0.1
August 27, 2026
Price an imperfect study on any decision, not just two-outcome ones. A new Log tab records what you decided and what actually happened, then scores your forecasting: Brier score, reliability curve, and whether your probabilities run high. Steadier dominance testing, faster analytics, and notes that travel with your options.
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FAQ
What is R-MAP Crux?
R-MAP Crux is a decision analysis tool that helps you evaluate options against uncertainties. It prioritizes checking for dominance and the value of information before asking about your risk preferences.
How does R-MAP Crux handle uncertainty?
It allows you to define states of the world, their likelihoods, and the payoffs of each option under those states as ranges, which are then converted into distributions.
Can R-MAP Crux tell me if I'm not ready to decide?
Yes, if the expected value of perfect information is significant compared to the decision itself, R-MAP Crux will indicate that deciding now is premature and show you the potential cost.
How does R-MAP Crux price a study?
You can set how often a study would be correct, and R-MAP Crux will price it. If the study's cost is less than its worth, it recommends acquiring that information before making the decision.
Does R-MAP Crux have ads?
No, R-MAP Crux does not contain advertisements. It is designed for privacy, with no account, sign-in, analytics, or tracking.
What devices is R-MAP Crux available on?
R-MAP Crux is available on iPhone and iPad devices.
How often is R-MAP Crux updated?
The latest version, 1.0.1, was last updated on August 27, 2026, indicating recent development activity.
What is the age rating for R-MAP Crux?
R-MAP Crux has an age rating of 4+, making it suitable for a wide range of users.