A chart is never really one document. It's an intake form, an insurance card, a consent form, lab results, and a physician's notes, arriving at different times from different people. Front-desk staff end up as the safety net for whether the file is actually complete, and that's a bad job to give someone who's also answering phones.
SimpleIndex runs the recognition step instead: read what's on the page, check it against what the file is supposed to contain, and file it where your EHR or practice management system expects it. By default no scanned image leaves your own hardware.