This is a simple game to train your memory. Your task is to guess which element is missing in two lists of different items. With each round the number of items is increasing until you make a mistake. The initial release of the game features the following lists:

- Random numbers
- Random English words
- Random English synonyms (advanced)
- Random Chinese hieroglyphs
- Random flags

No Internet connection is required. Ideal for people on a commute with no wifi.