Decision Lab
Turn big life decisions into experiments. Run scenarios in seconds, compare options, and save your results.
Turn big life decisions into experiments. Run scenarios in seconds, compare options, and save your results.
Each calculator is built around a real decision — not a formula. Enter your numbers, see results instantly, and save them as experiments you can revisit anytime.
Every result highlights the 3 inputs that influence your outcome the most. Focus your attention where it counts.
Rent vs Buy, EV vs Gas, and Car TCO let you enter two scenarios and see a clear winner with charts over time.
Set your investment return, inflation rate, and more once. Every new experiment starts from your personal baseline.
Save experiments, duplicate any result, tweak one variable, and see how the outcome changes.
No account required. No data leaves your device. Every calculation runs locally.
Native SwiftUI app designed for iPhone. Fast, smooth, and feels right at home.