Synonym is a free, versatile dictionary application that allows you to look up synonyms, antonyms, and definitions in English, Spanish, and Portuguese. Developed by Duatech, the app provides access to some of the most popular internet dictionaries including beautifulsynonyms.com, sinónimo.es, and sinônimo.com.

One of the most comprehensive dictionaries available, Synonym boasts a collection of 50,000 to 150,000 terms depending on the language and over 100,000 meanings per language. The app is user-friendly, with its easy-to-navigate interface making it quick and easy to access the information you need.

In addition to the free version, Synonym also offers premium options such as Search History, Integration with external apps, and Ad-free browsing, all included in an annual subscription package. It's worth noting that the dictionaries are not downloaded onto your device, so an internet connection is necessary for proper operation.

Overall, Synonym is an excellent dictionary app that is perfect for anyone looking to expand their vocabulary and language skills. Download it now and have a wealth of information at your fingertips.