The app does not matter; the alerts do. Price alerts are table stakes and mostly noise for an ETF holder. Allocation drift, dividend announcements, corporate actions: those are the alerts worth having.
- One brokerage or three? A tracker that sees one account is a rumor, not a report - Can it say "tell me when my stock allocation passes 85%" or only "tell me when VOO moves 5%"? - Demand overlap warnings when a new fund duplicates what you hold - Yahoo Finance covers watchlists and alerts fine; your broker's app covers what it can see - The best tracker is the one whose alerts you have not muted after a month
When an alert fires and something needs a second look, Overlap ($4.99 one-time) compares the candidates side by side.