Email Subject Line Optimizer

If you're sending marketing emails or newsletters, this gives you multiple subject line variations using established copywriting frameworks and estimates open rates based on historical patterns. You paste in your email context, and it generates A/B test candidates with predictions on which will perform better. The format is clean with copy-paste ready options and explanations for why each approach might work. Honestly most useful if you're doing regular sends and want to move faster than manually brainstorming five versions of the same hook. Saves the back-and-forth of "does this sound too salesy" conversations.