Contrarian take: the best Android apps for college application planning were not built for college applications. They are general productivity apps, and that is their strength. They are maintained, they sync, and they will still exist when you hit submit.
Google Calendar handles the deadline side. Application deadlines, test dates, waiver windows: put them on a calendar with reminders and they stop being surprises. Boring. Effective. The two best adjectives in this whole process. It is a milestone tracking app for college applications in disguise, and the disguise is free.
Google Sheets is the free applicant progress tracker app hiding in plain sight. One row per school, columns for fee, waiver status, deadline, documents sent. Ugly. Works. Every counselor I have seen do this well uses a spreadsheet, not a fancy tool.
Trello turns it into a board: lists for dream, match, and safety schools, cards per school with checklists for documents and fee payments. If you are a visual thinker, this beats a spreadsheet. The free tier is plenty.
Notion is the heavyweight. Databases, linked pages, a real profile building roadmap app you assemble yourself: test prep logs, activity timelines, essay drafts in one workspace. The learning curve is real. If you enjoy organizing, it pays off. If you do not, it becomes one more thing to maintain, and tools maintained by nobody die quietly.
What about dedicated college planning apps for high schoolers? They exist, some are decent, but they come and go. An app built by a startup last year might not survive to your admissions cycle. The four above will.
My ranking, framed as options worth comparing: Sheets for tracking, Calendar for deadlines, Trello for visual thinkers, Notion for the ambitious. Pick one. Use it daily. The app is ten percent. The habit is ninety. People always want this ratio reversed. It is not.
Compare the fee side of your plan with the database at applicationexperts.fyi. And for the two-year version of all of this, get a 1-2 year profile roadmap.