AIO dictionary is a all in one khmer dictionary which can translate from 6 languages to khmer, khmer to khmer and khmer to khmer (Kingwords 'Reach Sab') dictionary. That languages are:
- Khmer to Khmer
- English to Khmero
- Thai to Khmer
- French to Khmer
- Japanese to Khmer
- Korean to Khmer
- Chinese to Khmer
- Khmer to Khmer (Kingwords 'Reach Sab').
- English to English
- English to English Thesaurus

This App includes many features like:
- Fast and easy searching word ( beginning and contain word )
- Easy switch from one dictionary to one dictionary
- Able to store your favorite words ( Bookmarks)
- Able to check your recent words
- Included talking words and reading selected phrases ( 6 languages )
- Support both landscape and portrait.