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APP — Content

Agree · Promise · Preview

The three-sentence blog opener. Disarms the reader, earns their trust, then gives them a reason to keep reading.

5 min readUpdated June 2026
Formula
APP
See the steps ↓

What is the APP formula?

APP — Agree, Promise, Preview — is the fastest and most reliable way to open a blog post, article, or newsletter. Developed as a content marketing framework, it solves the single biggest problem with most content openers: they take too long to prove they're worth reading. APP does it in three moves. First, agree with something the reader already believes — this creates instant rapport and signals you understand their world. Second, make a promise about what reading further will deliver. Third, preview exactly what's coming so the reader has a reason to stay.

Step by step

The 3 stages of APP

A
Stage 1
Agree
Start with something the reader already believes to be true. Earn instant rapport.
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The Agree stage is a rapport-building device. You're not starting with your idea — you're starting with theirs. Find the belief, frustration, or observation your reader already holds and validate it in your opening sentence. This creates the feeling of being understood before you've asked for anything. It also positions you as someone on the same side as the reader — not an authority lecturing them, but a peer who gets it.

Do
  • Start with a widely held belief, frustration, or observation in your reader's world
  • Keep it short — one sentence is ideal
  • Make it specific enough that your target reader nods and generic enough that they don't need context
  • Use the reader's language, not yours
Don't
  • Start with a controversial claim — Agreement is about common ground, not provocation
  • Open with a compliment ('Great question!') — that's not agreement, it's flattery
  • Spend more than one sentence on Agree — it's a setup, not the point
  • Agree with something so generic it applies to everyone and no one ('Marketing is hard')
P
Stage 2
Promise
Tell them what they'll get from reading on. Make the payoff clear before they commit.
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P
Stage 3
Preview
Show them what's coming. A one-sentence map that removes uncertainty.
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See it in action

Real example

Real example — blog post introA copywriting blog post titled 'Why your email open rates are stuck (and the fix most writers miss)'.
Agree“Most copywriting advice focuses on the email body — the story, the offer, the CTA. The subject line gets maybe 10 minutes.”
Promise“In this post, I'll show you why that's backwards, and give you a five-part subject line framework that consistently outperforms the 'clever' subject lines most marketers default to.”
Preview“We'll cover why subject lines fail, what the data actually shows, and a formula you can apply to your next email before you send it.”
Best applications

When to use it

Blog post introsBlog post intros
Newsletter openersNewsletter openers
Article leadsArticle leads
Content marketingContent marketing
The psychology

Why it works

  • Agree creates instant rapport — the reader feels understood before they've read a paragraph
  • Promise answers the reader's core question: 'What's in this for me?'
  • Preview removes uncertainty — readers know what's coming and are more likely to stay
  • Takes under 60 seconds to write once the Agree point is clear
Avoid these

Common mistakes

✕ Agreeing with something too generic
Fix'Marketing is hard' is too broad. 'Most marketers spend more time writing emails than writing the subject lines that determine whether those emails get opened' is specific enough to be useful.
✕ A Promise that undersells the content
FixIf your content is genuinely valuable, the Promise should reflect that. Modest promises keep readers who already trust you. Bold specific promises attract new readers.
✕ A Preview that gives away the whole post
FixThe Preview should create appetite, not satiate it. Name the topics without resolving them.
Going further

Variations worth knowing

ACCA opener
Awareness · Comprehension · Conviction · Action
For analytical audiences, the ACCA opener replaces APP's rapport-first approach with an education-first approach — surfacing the problem before earning trust.
Quick answers

Frequently asked questions

What is the APP formula in copywriting?↓
When should I use the APP formula?↓