UpDown Stock

UpDown Stock is a personal prediction tracking app for US and Korean markets.

This app does not predict stock prices for you. Instead, it helps you record your own daily up/down predictions and review the results after the market closes.

Choose a market, select an index, stock, or ETF, and record whether you think today’s regular-session close will be up or down compared with the previous regular-session close.

After the close is available, you can review whether your prediction was correct, wrong, void, or still pending.

Main features:

- Track US and Korean market predictions
- Select from supported indexes, stocks, and ETFs
- Record Up or Down predictions
- View daily candlestick charts inside the app
- Review today’s saved predictions
- Check prediction history grouped by date
- View accuracy and performance statistics
- Support for English and Korean
- Light and dark theme support

UpDown Stock is designed as a simple tracking tool for building a personal market prediction habit. It helps you look back at your own prediction records instead of relying on memory.

Supported markets include selected US and Korean indexes, stocks, and ETFs. Market data may come from third-party data sources and may be delayed, unavailable, or different from official exchange data.

Important notice:

UpDown Stock does not provide investment advice, buy or sell recommendations, trading signals, financial advice, or any guarantee of profit. All predictions are entered by the user for personal tracking purposes only.