FillBook

LUDIC FLOW

In-app purchases

About this app

Filter out the market noise, focus on your numbers.
FillBook is the ultimate trading journal designed specifically for smart stock investors.

FillBook goes beyond traditional spreadsheets. By logging both your trading metrics and psychological states, it helps you reflect on your trading patterns and build bulletproof discipline.

■ Your Trading Journal as a Timeline
Log your trades on a clean, dot-based daily timeline. Buy, Sell, Realized Profit, Cutting Losses, or Staying on the Sidelines — your entire trading day is summarized at a glance. Simply enter the ticker, execution price, quantity, and Risk-to-Reward (R:R) ratio to automatically generate a daily summary title.

■ Log Your Emotions and Psychology
Track your emotional state using the Fear & Greed Index (Extreme Fear, Fear, Neutral, Greed, Extreme Greed) at the exact moment of your trade. Reviewing the psychology behind your numbers is the best way to prevent FOMO and emotional trading.

■ Portfolio Management at a Glance
Monitor your current holdings with real-time estimated profits and returns. Manage your entire trading history of closed positions all on one screen. FillBook fully supports both the Korean market (KRX - KOSPI · KOSDAQ) and the US market (NYSE · NASDAQ).

■ Your Data Belongs to You
All your records are stored locally on your device. By enabling Google Drive sync, your data automatically synchronizes across devices sharing the same Google account. No tedious sign-ups, no external server transfers — your financial data stays completely private and secure.

Start building your personalized trading playbook with FillBook today.
From Fill to Book.

What’s new

Account management has been added.

- Manage your trade records and portfolio separately by account, including pension, ISA, IRP, and others.
- Switch between accounts by tapping the title or swiping left/right on the Portfolio and Records tabs.
- Analysis reports and journal PDFs can now be generated separately per account.
- This update also includes minor improvements and bug fixes.