Notepad Free is a small and fast app to create and edit text notes. 

Features:

* simple interface that most of the users find easy to use

* no limits on note's length or number of notes (of course there's a limit to phone's storage)

* creating and editing text notes

* importing notes from txt files, saving notes as txt files

* sharing notes with other apps (e.g. sending a note in Gmail)

* widgets allowing to quickly create or edit notes

App Name: Notepad Free

Brief: Notepad Free is a versatile text-editing app designed for those who need a simple yet powerful tool for taking notes on their mobile device. Packed with features such as a backup function, password protection, and a user-friendly dark theme, this app ensures that your notes are safe, organized, and accessible whenever you need them.

Core Features:

• 📁 Backup Function: Safeguard your notes with the ability to save and load from a backup file (zip file) ⚙️.
• 🔒 App Password Lock: Keep your notes private with a secure password protection feature 🔐.
• 🌙 Dark Theme: Ease on your eyes with a comfortable dark theme for extended use 🌜.
• 💾 Automatic Note Saving: Never lose a change with notes being saved automatically as you write 💽.
• ↪️ Undo/Redo: Easily rectify mistakes or restore information with the undo/redo feature 🔄.

Pros:

• 👍 Widget Support: Create icons for your notes and place them directly on your home screen for quick access ✨.
• 👍 Optional SD Card Writing: Backup your notes externally, ensuring data portability and security 🔖.
• 👍 User Friendly: With intuitive design, it's easy to start taking notes right away 🖌️.
• 👍 Updates & Support: Active developer support and advice on backup before changing devices 🛠️.
• 👍 Permissions Control: Maintain control over the app's permissions with the ability to revoke at any time ⚖️.

Cons:

• 👎 Dependency on Device Settings: Backup to Google device copy requires both device's and app's settings to be configured accordingly 📲.
• 👎 Storage Limitations: Cannot be installed on an SD card due to widget functionality 🚫💾.
• 👎 Permissions Required: The app requests permission to write on SD card which might concern privacy-focused users 📋.
• 👎 Limited Aesthetics: Dark theme is appreciated but there may be a lack of other customization options 🎨.
• 👎 Email-Only Support: Support is primarily offered via email which might not be the fastest communication channel 📧.

Price: 💵 The app is available for free, making it a cost-effective choice for users seeking a straightforward note-taking application.

Craft a comprehensive report with an engaging narrative, covering everything from basic functions to key features, while also touching on the potential negatives and providing a clear indication of the cost. Additionally, incorporate any community-related aspects, such as the developer's website or social media channels, where applicable.