For documents, a mobile app to track application documents does not have to be application-specific either. Google Drive folders per school, named consistently, do the job. The trick is naming. "SOP_Draft3_Stanford.pdf" tells future-you everything. "final_final2.pdf" tells you nothing.
Deadlines go in Google Calendar. Every date gets two alerts, one a week out and one the day before. Share the calendar with someone who will hold you accountable. Your phone buzzing is a better project manager than your intentions. If you want one purpose-built tool instead of four general ones, a free application deadline tracker app covers dates plus documents in one place.
Then the weekly review, which is the part everyone skips. Sunday night, ten minutes. Open the checklist app, open each portal, confirm every item shows received. Portals flag missing documents silently. The app tracks your tasks. The portal confirms reality.
Some applicants also want a grad school application completeness checker SaaS for the final pass: a checklist against each program's actual requirements rather than their own notes. Belt and suspenders. Nothing wrong with that.
The requirements database at applicationreview.fyi feeds all of this: real deadlines and document lists per program. When the file is complete, get your application audited before you submit.
