For anyone who writes one subject line and hopes
Everything else you wrote only counts if this one line earns the open.
Most people write a subject line the way they pick a Wi-Fi password. You type the first thing that works, hit save, and forget it exists.
So the best email you write all month lives or dies on ten words you spent nine seconds on.
This writes seventeen instead. Each one pulls a different psychological lever: curiosity, loss aversion, social proof, or the pattern interrupt that stops a thumb mid-scroll.
A cold list opens for different reasons than a warm one. A health audience is not a SaaS audience. With seventeen angles, one of them fits the email in front of you.
Paste an email into the box and watch it work. Then install the prompt and run it on everything you send.
Paste an email and get 17 subject and preview pairs, each built on a different formula.
That's your free run. Drop your email for three more a day. I'll also send you the installable prompt, so you can run this any time.
Your 17 subject lines
Each pair runs on a different formula. Copy the ones that fit and A/B the rest.
Get the Subject Line Writer as a prompt you install once. It runs in Claude or ChatGPT, on any email, for as long as you send email.
You'll get emails from me about copy and email marketing. Unsubscribe any time and I'll only be a little hurt.