1. A stock screener with honest defaults
The job is narrowing 10,000 tickers to ten worth reading about. SteadyShares' screener covers 1,100+ global names with moat scores and fair-value estimates, every assumption visible; Finviz remains the fastest free US-only scan; TradingView wins for chart-first screening.
The trap in all of them: a screen finds statistical cheapness, and value traps are precisely statistical cheapness with a broken business attached. A screen is a reading list, not a buy list.
2. A fair value calculator you can argue with
The job is turning a story into a number you can be wrong about in public. Our free fair value calculator exposes the growth, margin and discount assumptions on sliders; change them and watch the number move, which teaches more valuation than most books.
The trap is false precision. Any tool that gives you a fair value to the penny without showing its assumptions is selling confidence, not analysis.
3. A 13F and insider tracker for adult supervision
The job is checking your idea against people who do this with billions and file their holdings under oath. SteadyShares tracks 140+ funds and congressional trades free; Dataroma and WhaleWisdom are the venerable alternatives.
The trap is latency: 13Fs arrive up to 45 days after quarter end, so you are seeing where smart money was, not where it is. Follow the reasoning, never the ticker alone.
4. Retirement and independence math
The job is sizing the whole plan before optimizing any part of it. Our FIRE and Coast FIRE calculators show the target and the age you hit it with the withdrawal-rate argument out in the open; for US-specific 2026 tax math, the take-home and Roth conversion tools price the new rules exactly.
The trap is single-scenario thinking. Run the pessimistic case (lower growth, lower withdrawal rate) and check the plan survives it; a plan that only works in the average case is half a plan.
5. A portfolio tracker that shows drift, not just gains
The job is noticing that your 60/40 quietly became 75/25 because tech had a good year. Our free rebalancing calculator and portfolio spreadsheet show drift and the exact no-sell trades to fix it with new money.
The trap is tracking as entertainment. Checking daily correlates with trading more and earning less; the tracker's job is a quarterly appointment, not a dopamine feed.
The one-sentence buying guide
Pick one tool per job, prefer the ones that show their assumptions, and treat any tool that hides its math as marketing. All five jobs are covered free on our tools page; the links above go straight to each one, no signup wall in front of any of them.