Diary with Lock No Internet is a free Android application developed by Raanaa that allows users to safely record their daily notes, memories, goals, dreams, and photos. The application does not save users' data to any server on the internet, ensuring that their personal information remains secure. Users can set a password, change it, and even remove it if they want. If they forget the password, they can specify a hint that will help them remember it.

The application automatically saves the date and time on each page the user opens to write a new note. Users can also customize their pages by changing the background image, font color, font style, and font size. Additionally, users can add photos to their pages and edit them later. The application allows users to search their saved data by typing the word they want to search between titles or notes or by selecting from the calendar. All saved data is listed on the main page, and users can access their most recent notes in a sequential order with their dates.