Product: https://killionlabs.com I spent a year building Killion: a retirement simulator for people who are done with a calculator that assumes 7% forever and hands you one number. It links brokerage accounts read-only, runs 1,000 market lifetimes (regime-switching Monte Carlo, backtests to 1928), and lets you change the thing that actually breaks plans — crash year, withdrawal rule, fees — and see the odds move. September: 50 new paying users. Solo. $14/mo or $132/yr. 5-day trial, then they stay or they don't. The part that still surprises me is what it took to get here. I launched with a hard paywall and "connect your brokerage" before anyone had seen a cone. Paying users: one, which was me. Then I shipped a no-signup demo of the real engine, a 5-day trial, and the studies

  • 情报分类：项目价值
  • 命中依据：独立产品获付费用户，属真实项目与经营经验
  • 来源：Reddit · SideProject
  • 原作者：/u/Dry-Firefighter-4103 https://www.reddit.com/user/Dry-Firefighter-4103
  • 发布时间：2026/9/10 07:01:27