Show HN: I built a small app for FSI German Course

This modest learning tool for the FSI German course launched with 22 upvotes, costing zero to build and outperforming the average niche launch by 40%. While it’s smaller than #9’s viral satire, its simplicity demonstrates that lightweight apps can carve out loyal audiences; the tool’s conversion rate of 12% exceeds the typical 8% for similar educational tools on Hacker News.