Nelson Ting

TradeSafe is a practice investing platform. You create an account, get a balance of simulated money, and buy and sell real stocks from the S&P 500 without risking anything. Your portfolio value updates as prices move, so it feels like a real brokerage app.

Behind the scenes, the app collects stock market data every night and stores a complete copy of it, so nothing is lost if the original source changes or goes down. That data is then cleaned up and organized in a data warehouse, ready for charts and analysis. When you place a trade, the app checks current prices and updates your account right away.

onTime is a mobile app that tells New Yorkers when their subway is actually going to arrive. Official arrival times often don't account for delays, so onTime combines the MTA's live train data with patterns from past delays to give a more realistic estimate.

The app keeps checking for new train data in the background and saves delay history for every line and stop over time. When something changes, updates appear on your phone instantly, without needing to refresh.

TandonGeoguessr is a guessing game set around NYU Tandon's campus, inspired by GeoGuessr. Players see a photo taken somewhere on or near campus and try to pinpoint where it was taken. The closer the guess, the more points you earn.

Players can create accounts, join lobbies to play against friends, and see results update live during a game. Scores are saved to a leaderboard, so you can track how you stack up against other students over time.