Where the facts come from. Every feature tick and every catalog figure comes from the site's own pages, its help center or its store listing, read on 2026-10-07, and the exact words relied on are kept with each row (open "Sources" on any card). Catalog sizes are self-reported and change monthly; they are quoted as the site states them. App ratings are the stores' own on that date, pulled through Sonar. A feature is marked yes only when the site says it; when it does not, it is shown as unknown rather than as no.
How it was checked. Every row was researched once and then handed to a second, independent pass whose only job was to break it: open the same pages, check every tick, every claim, every rating. Rows it could not confirm were corrected or marked unknown before publishing.
What this page does not measure yet. Accuracy. We have not yet taken the same ten songs and checked each source's chart against the record, bar by bar. Until that panel and its method are published here, nothing on this page says whose charts are right; the columns say who made them, which is the best proxy we have.
On legality. Sites that host user-uploaded charts of copyrighted songs live in a gray area that has closed sites before. This page describes them; it does not endorse them. Licensed libraries and transcribers' shops pay the publishers; that is part of what you pay for.
Prices. Every price is in US dollars, read on 2026-10-07 on the store or page named next to it, with a link: Sweetwater, Musician's Friend or the maker's own store for gear and books, the US App Store's in-app purchase list or the maker's pricing page for apps. When a maker sells for less on its own website than in the app, both are shown. Prices change, so the date is part of the fact: check the store before you buy. Nothing on this page is an affiliate link.
Photos. Product photos and icons belong to their makers and publishers, taken from their own pages to show which product a card is about. Each card names its source; a maker who wants a photo removed can write to support@upbeat.studio.