Words
Clarity, specificity, audience fit, and curiosity.
Free app-ad hook grader
See what your hook communicates before you film it.
Check one opening for clarity, specificity, audience fit, curiosity, visual flow, and claims that may need stronger proof.
Your hook stays in this browser
Your opening
Give the hook enough context to grade fairly.
The optional first visual makes the handoff check more useful.
What the grade covers
A useful review, without pretending to know performance.
Handoff
Whether the first visual can answer the opening.
Proof
Wording that deserves stronger support or review.
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How to use the grade
Fix the weakest link, then test the ad.
Step 1
Read the lowest score
That is the clearest place to improve before changing everything else.
Step 2
Keep claims grounded
Use only facts, outcomes, and proof the product and footage can support.
Step 3
Test the finished pairing
A good line still needs the right opening shot and demo handoff.
Common questions
Hook grader FAQ
Does a high score mean my app ad will perform well?
No. The score checks the writing against transparent craft rules. It cannot predict views, clicks, installs, or sales.
Does ClipStitchr save the hook I grade?
No. Grading happens in your browser, and the hook and context are not sent to a grading API.
Why does the grader flag claims?
Numbers, guarantees, authority claims, and sensitive outcomes need support. A flag is a reminder to review the wording, not legal advice.