Tools & Resources

There are thousands of investing platforms, productivity apps, and books competing for your attention. Most "best of" lists rank them by commission rate, not quality.

We take a different approach. Everything on this page meets three criteria:

1. Evidence of effectiveness — does research or real-world data support using this?
2. Cost-efficiency — does the fee structure make mathematical sense for the typical user?
3. Alignment with probabilistic thinking — does the tool encourage rational decision-making, or does it exploit behavioural biases?

If something stops meeting these criteria, we remove it. If we find something better, we add it.

The single most important variable in platform selection is fees. A 1% annual fee difference compounds into tens of thousands of pounds over a lifetime of investing. Every platform below charges significantly less than the industry average — that's the minimum bar for inclusion.

Which one suits you depends on your experience level and what you're investing in.

Reading about probabilistic thinking is a good start. But calibration — the ability to accurately assess how confident you should be — only improves through deliberate practice. These tools help you move from theory to skill.

Spreadsheet Templates

Sometimes the best decision tool is a well-structured spreadsheet. We're building a library of templates for common expected value calculations:

• Decision matrix — weight criteria, score options, calculate expected outcomes
• Kelly criterion calculator — optimal position sizing based on your edge and odds
• Monte Carlo retirement planner — simulate thousands of market scenarios instead of relying on a single "average return"

These will be available as free downloads as we develop them. In the meantime, the concepts behind each are covered in our Fundamentals articles.

Five books that genuinely changed how we think about decisions, risk, and uncertainty. Not a "top 100" list — just the ones we keep coming back to.