Orbit web apps
Orbit web apps
Paste an email subject line and (optionally) a preheader. See length flags, emoji density, spam-trigger words, and inbox-preview truncation — all in real time.
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The long-form guides that explain the thinking behind the tool. Written for operators who want to know not just what to do, but why.
craft · 8 min read
Subject line anatomy: the four parts every line that performs shares
Most subject-line advice is decoration tips — emoji, length, numbers. The lines that actually get opened share a structural pattern. Four parts in a specific order, the three distortions that ruin it, and the four rules that keep A/B tests honest.
craft · 6 min read
Emojis in subject lines: when they help, when they hurt
One well-placed emoji lifts open rate a few percent. Three reads as spam and drops it. The honest version of the emoji question is smaller and more specific than the debate suggests — here's the pattern that actually survives testing.
craft · 7 min read
Preheader text: the second subject line most programs ignore
The preheader is the snippet shown next to the subject line in the inbox preview. Treat it like a second subject line and you double your hook. Treat it like an afterthought and it says 'View this email in your browser'. Here's how to write preheaders that actually earn the open.
deliverability · 8 min read
Apple Mail Privacy Protection, four years in
Apple broke the open rate in 2021. Half the lifecycle industry is still pretending it didn't happen. Four years on, the programs that actually adapted are beating the ones that kept optimising a metric that doesn't exist anymore.
craft · 8 min read
Brand voice in lifecycle: how to sound like you, not the generic SaaS CRM voice
Lifecycle emails — the automated sequences that go out on signup, after a purchase, when a cart is abandoned — drift toward a polished, generic SaaS voice because it's the default in every template library. Here's how to actually write in your brand's voice across an entire program.
A free rule-based subject line scorer for email marketers. Scans length, emoji density, spam-trigger words, all-caps shouting, exclamation density, and preheader duplication. Shows a desktop + mobile inbox preview with truncation points marked. No sign-up, no API calls, no data leaving your browser.
Lifecycle marketers, CRM managers, and email operators who write subject lines regularly and want a fast sanity check before hitting send.
Using Claude?
Inside Orbit for Claude, the Copy Framework and Email Production skills apply every rule this scorer checks — length, emoji density, spam triggers, preheader separation — while the copy is being drafted. No post-hoc scoring, no back-and-forth. The subject line lands production-ready on the first pass. Free for everyone — the Claude extension is the power-user upgrade, not a gated feature.