Step 1 · Your Gemini API key
Bring your own key — it stays in your browser and is only sent to Google. No key yet? Get a free one from Google AI Studio — it takes about a minute.
Key saved in this browser.
The more specific, the better: the offer, the audience, the deadline, the product name.
Step 3 · Pick your angles
Pick at least one angle.
Your subject lines
≤ 50 chars — fully visible on mobile 51–70 — may get cut off 70+ — likely truncated