Hey, Product Hunt! I'm excited to share 'Then, follow' — a simple, free backtesting tool for comparing asset allocation strategies. This is an early version. I'm launching to get feedback, not because it's perfect. 1. Why I built this Last year, I wanted to backtest several asset allocation strategies. I tried existing platforms and felt overwhelmed: - Too many options and settings - Financial jargon everywhere ("semi-variance", "geometric mean") - Expensive ($300-$600/year for full features) - Desktop-only interfaces I just wanted a simple answer: "Would All Weather have protected me in 2008?" So I built what I needed: simple workflow, visual results, completely free. 2. What I focused on (1) Simple 3-step workflow - Select strategies → Set date range and choose rebalancing frequency → See results - No complicated optimization settings. (2) Visual-first results - Instead of tables full of numbers, you get: a. Cumulative returns chart — See performance side-by-side b. Asset allocation pies — Understand portfolio composition c. Drawdown chart — Visualize worst declines d. Monthly returns heatmap — Spot seasonal patterns e. Correlation matrix — Check diversification (3) Complete historical data - Full ETF history from listing date to latest month: a. SPY: 1993~2026 (33 years) b. TLT: 2002~2026 (24 years) c. GLD: 2004~2026 (22 years) - No 10-year limits on free tier. (4) Mobile-friendly (mostly) - Works on phones and tablets. Some charts need horizontal scrolling on small screens, but it's usable. (5) Zero cost, zero friction - No paywalls, no "upgrade to see this chart." 3. What's missing This is v1.0. Lots of features aren't here yet: - Custom portfolio builder (you can't mix your own ETFs) - Daily/weekly backtesting (monthly only for now) - More strategies (I have 6, planning more) - Advanced settings (can't customize rebalancing, costs, etc.) - Export to CSV I kept it focused on the basics to ship something useful. 4. What's next Based on feedback, I'm considering: - Dynamic asset allocation strategies (momentum-based) - More classic portfolios (Permanent Portfolio, etc.) - Better mobile optimization - Export features - Advanced settings for power users Your input will shape what I build next.** ### 🙏 I need your feedback! **Try it**: https://thenfollow3.vercel.app **Tell me:** 1. Was the workflow simple enough? 2. What was confusing? 3. What ONE feature would make this 10x better? 4. How was the mobile experience? Thanks for checking it out!

Then, Follow

Compare asset allocation strategies easily

Compare asset allocation strategies easily