"mem" is an iPhone application developed by Catalystwo Limited. It is a memory tool based on the "Leitner's System" designed by Sebastion Leitner inThe app simulates the Leitner system and serves as a simple, convenient, and effective memory tool for foreign language students or anyone looking to improve their memory skills.

The app allows users to create flashcards for words, phrases, or equations they want to memorize. These flashcards are then organized into different compartments based on the Leitner system. Users review the flashcards in the first compartment multiple times a day. If they remember the information, the flashcard is moved to the next compartment. If they forget, it is placed back in the first compartment.

The capacity of each compartment is optimized to efficiently recall memory, and the frequency of reviewing each flashcard increases as it progresses through the compartments. The last compartment can hold an unlimited number of flashcards, but it is recommended to review them periodically.

Some key features of the "mem" app include graphically visible stored cards for motivation, a non-proprietary file format for saving documents, synchronization via Dropbox for editing on Mac/PC, night mode for studying in low light, and the option to listen to words for improved memory.

The app also provides instructions on how to scan your own cards using the camera and how to add multiple words using Dropbox. It is a comprehensive memory tool that combines simplicity and effectiveness for optimal learning.

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