Stock Principle: Trade Journal

Trading Diary & Stock Tracker

Only for iPhone

Free · Designed for iPhone. Not verified for macOS.

iPhone

Why did you buy that stock? Log every buy and sell with your reasons and emotions, review your trades with AI, and turn repeated mistakes into rules for the next trade. Why did you buy that stock? Do you still remember? Stock Principles is a trading journal and stock diary. Record the reasons and emotions behind every buy and sell, review your trades with AI, and turn what you learn into your own trading rules. The moment you chased a stock that had already soared. The moment fear of a loss made you break your own rule. The moment you sold, and only then asked yourself why. When you write it down in your trading journal, you can look back at your decisions honestly. ■ A trade journal that keeps your reasons • Keep buy, hold, and sell records for each stock in one place. • Log your mindset at entry, your answer to each rule, and chart screenshots. • While holding, note emotions such as conviction, anxiety, impatience, fear, or greed, along with your plan. • Record why you sold and whether you followed your rules. ■ A daily trading diary • Write a one-line review, what went well, and what to improve. • Add notes and photos to remember the market context. • Build a trade-by-trade log and a day-by-day diary side by side. ■ AI trade review • AI reads your recent journal entries and reflections, then evaluates your rules, rule compliance, and review notes. • See the behavioral biases that show up in your records and the actions to improve. • Save suggested actions as rules and check them before your next trade. ■ Trading psychology and behavioral finance • Learn how cognitive biases, emotions, and herd behavior shape investment decisions. • Reflect on FOMO, impulsive trades, loss aversion, and confirmation bias through your own trades. • Bookmark articles and keep your own notes. ■ Your trading rules and checklists • Write rules and checklists for buying, selling, and waiting. • Start from the principles and quotes of legendary investors and adapt them to your style. • Turn experience notes into rules with AI and refine them as you keep journaling. ■ Macro dashboard and market context • Check the Fear & Greed index, VIX, US Dollar Index, 10Y–2Y yield spread, oil, gold, and more on one screen. • Use market cycle theories to think about the current phase and note today's view. • Group stocks by theme and save the articles and insights you want to keep. Made for investors who want to • keep a consistent stock trading journal and buy/sell log • review impulsive trades and stop-losses they did not keep • apply trading psychology to their own habits Turn the same regret into a rule for your next trade. Start your trading journal with today's trade. Stock Principles supports record keeping and learning. It does not recommend stocks, place orders, or guarantee investment returns. Market data is for reference only and may be delayed. AI trade review and AI rule generation use in-app credits, which you can also earn through daily check-ins and rewarded ads. Support: https://stockprinciple.web.app/support Privacy Policy: https://stockprinciple.web.app/privacy.html

Ratings & Reviews

  • This app hasn’t received enough ratings or reviews to display an overview.

• Added AI analysis feature for trading journals. • Added a new article featuring Jim Cramer. • Improved trading journal UI and usability.

Version 1.0.10

The developer, HyunJun Moon, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Used to Track You

    The following data may be used to track you across apps and websites owned by other companies:

    • Identifiers

  • Data Linked to You

    The following data may be collected and linked to your identity:

    • Contact Info
    • Identifiers

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • User Content
    • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Seller
HyunJun Moon
Size
50.8 MB
Category
Finance
Compatibility
Requires iOS 15.0 or later.
  • iPhone
    Requires iOS 15.0 or later.
  • iPod touch
    Requires iOS 15.0 or later.
  • Mac
    Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
Languages
English and 5 more
  • English, German, Japanese, Korean, Spanish, Traditional Chinese
Age Rating
16+
Copyright
© 2026 moonshot
  • Developer Website
  • Privacy Policy

    • More by HyunJun Moon

    You Might Also Like