ASOptimusFree ASO tools
Small, no-signup tools for indie app developers — each computed live from real App Store data, running entirely in your browser. No account, no limits. Built by the team behind ASOptimus.
App Store Keyword Difficulty Checker
Type a keyword and see how hard its top-10 is to beat — a 0–100 difficulty from the live store SERP, with every competitor's strength (ratings, freshness, name-match) broken down.
Open the checker →Metadata Character Counter
Live counts for the title (30), subtitle (30) and keyword field (100), with duplicate-across-fields and stopword warnings so you never waste a character.
Open the counter →ASO Audit — paste your app URL
Full metadata + ranked-keyword audit of a live app. This is the whole ASOptimus engine — landing in the free beta.
Coming soonWhy these are free: they're the measurable, competition-side pieces of the ASOptimus engine. The full app adds the hard parts — real search demand, keyword relevance scored against your product, and a ready-to-ship title/subtitle/keyword field assembled from the winners. Join the free beta →