Portuguese Verb Trainer is a free education and reference app developed by Appicenter LLC for Android devices. This app is designed to help users learn and practice the conjugations of the most common Portuguese verbs. It is ideal for anyone who wants to learn Portuguese and prepare for trips to Brazil, Portugal, and other Portuguese-speaking countries.

The app has a small size and works offline, making it perfect for on-the-go learning. It also features a spaced learning algorithm that reduces study time and highly customizable drills. The app covers all tenses, including composite tenses, and has optional voice output. Additionally, it is optimized for tablets and can be moved to an SD card.

Portuguese Verb Trainer also has a pro version with more verbs and tenses, as well as a companion language learning app called Verb Conjugator. The app is available in English, French, German, Italian, Portuguese, and Spanish languages.

It's important to note that the conjugations are slightly biased towards Brazilian Portuguese, and voice output may require Portuguese tts from an external vendor. Overall, Portuguese Verb Trainer is a handy study aid for those looking to learn and practice Portuguese verb conjugations.