Building an ETF portfolio on Android is completely doable. One caveat: the phone is great for research and terrible for thinking. Make allocation decisions where you can see a full table.
- Start with your broker's app: Fidelity, Schwab, Vanguard all ship solid Android versions - Yahoo Finance for pure research; boring pick, usually right - A real portfolio builder helps with the allocation mix, not just fund tickers - Want watchlist sync across devices and alerts on allocation drift, not on every 1% wiggle - Pick the broker first, the research app second; brokers stick for years, apps are free to swap
Once you know the target mix, Overlap ($4.99 one-time) finds the best ETF per slot across 108 funds.