Build a Personal Diary and Journal App

Journaling is widely known for improving mental clarity, emotional health, and goal tracking. Building a personal diary app gives you practical experience with secure local storage, text input management, search, and mood/emotion tagging—perfect for building habits and boosting self-awareness.

Users can create daily journal entries, add mood/emotion tags, mark entries as private, and reflect on past logs. The app supports search, themes, reminders, and local or cloud sync for backup.

Users open the app daily to jot down reflections, assign a mood, and optionally set a goal or gratitude note. The app organizes entries by calendar view and allows users to filter them for review or mental health tracking.

• User opens the app and creates a new journal entry.
• They write freely, optionally tag a mood or select from quick prompts.
• The entry is saved securely and timestamped in a chronological feed or calendar view.
• Users can search old entries by mood, keyword, or date range.
• Private entries can be locked with PIN or biometric login, with sync options to cloud storage.

• React Native Secure Store
• Flutter Secure Storage
• React Native Calendar Picker
• Firebase Authentication & Firestore
• Markdown Editor Component