Upload any UI screenshot — landing page, app screen, dashboard, mockup — and get a principal-level critique before you ship. 10-dimension diagnosis (hierarchy, typography, spacing, alignment, color, contrast, consistency, imagery, interaction, accessibility) with Ship / Fix / Broken verdicts; Top 3 fixes with exact values; Refinement, Conviction, Resilience; Principal Craft Score 1–10, justified. Built by a principal-level product designer. For designers, founders, PMs.
Other hook tools give you a score. This one refuses to. It measures which axis your own numbers support, and throws out the ones they do not. Paste your hooks with their real numbers. It builds candidate axes from your own copy, tests within-group homogeneity first, and only then compares groups. An axis whose groups are not internally consistent is rejected, not crowned. Ships with one measured prior: name the specific thing, not the category. On 14 ad creatives that ran 2.44x on CTR.
Diagnose why the first 6 seconds of your short-form video loses viewers — get a second-by-second evidence timeline, up to 3 named findings, 3 structurally different replacement hooks, and a timecoded edit table you can cut today.
Paste a Reel topic and get cover-frame text, a 3-second spoken hook, and the opening shot direction — no more blank first frame.
Predict second-by-second viewer retention for the first six seconds of a short-form video hook, then provide concrete opening fixes.
You ran a test and one variant looks better. Is that a finding or a coin flip? Paste trials and successes per variant. You get Wilson 95% intervals, a two-proportion test, and the check almost nobody runs: an overdispersion gate asking whether your grouping label explains anything. If the spread inside a group beats the spread between groups, no winner is declared. A p-value near zero has died on this gate before. Post-hoc axes get labelled. Underpowered tests get a sample size.
Paste a video title and summary and get a thumbnail brief, a four-reviewer mobile legibility check with an issues table, and a generator-neutral image prompt.
Turns foundation elevation readings and field notes into a finished ASCE Level B inspection report PDF - relative elevation survey table, chord-searched deflection ratio with tilt reported separately, plan-view contour map, coded visual observations, sub-slab plumbing slope analysis against code minimums, and a plain-language property owner summary.
Audits your short-form script with four reviewer lenses and returns a keep/tighten/cut beat table, 3 labeled alternative hooks and a prioritized fix list.