01
Per-card weighted earning rate (the number most apps get wrong)
Most apps say your Amex Gold earns 4x on groceries. We compute your actual weighted-average rate based on the $25K/yr cap and your actual spend. If you spend $30K/yr at U.S. supermarkets, your weighted rate is 3.7x - not 4x. The math is wrong by ~$210/yr if you don't catch it. We show the math, not the marketing copy.
Screenshot coming
Card detail showing 3.7x weighted rate for Amex Gold groceries (vs 4x catalog), with the cap-aware calculation expanded ("$25K at 4x + remaining at 1x").
