AppGrowKit

Build me an App Store screenshot generator and a personal rank tracker to replace AppGrowKit, single user, my own apps only. Use Node 22, TypeScript, SQLite (better-sqlite3), sharp, and a small React frontend on localhost. Do not offer alternative stacks. - Screenshots: I upload my real app screens. Compose a 3-panel App Store set by sending each panel to an image model (fal.ai key in .env), passing my screens as reference images so the in-phone UI stays faithful. - Send every render back to a vision model with a checklist: garbled text, elements sliced by a panel edge, invented star ratings or award badges, phone hardware where the style said none. If it fails, re-render once with the failures pasted in as corrections. - Composite the headline as real text with sharp, not model-drawn glyphs. Resize output to exactly 1290x2796 (iPhone) and 2064x2752 (iPad). - Tracking: a config file lists my App Store track IDs and the keywords I care about. A daily job hits Apple's public endpoints (itunes.apple.com/lookup, /search, the RSS chart feeds, and the customerreviews feed) with a real User-Agent and one request every 1.5 seconds. - Store every poll as a row with a timestamp, never an upsert. Rank history is the whole point and you cannot recover a day you overwrote. - The page shows my apps' rating and rank over time, new reviews since I last looked, and where I sit for each tracked keyword. - Out of scope: competitor intelligence, keyword difficulty scores, and revenue estimates. Those need a catalog of hundreds of thousands of apps with months of history. Say so in the README rather than faking them from a single day of data. - README: the two API keys, cost per screenshot set, and a warning that the tracker is worth little until it has been running for a month.