Best for offline use: Microsoft Translator
Microsoft jumped into the Android translation market with its simple and sophisticated app. This app is designed for offline use and supports 12 offline languages. Accessing these offline are really easy, you just need to download each individually. Each is around 200 MB and once you do you won't have to worry about losing your connection in a rural part of the world. After all, this is where English is spoken the least.The interface for Microsoft Translator is practical and well-designed. When you open the app, you are given three buttons for quick access. You can choose speak detection translation, keyboard translation or two-way translation for when you're in a social situation and need a translator.
While the interface is much nicer than most translator apps, Microsoft Translator is not a great all-around app. There aren't any options for picture or instant text translation, if you want this feature, read on. The app does support Android Wear and this can give you quick translation access that other apps cannot.
Best for quick use: Language Translator
If what you want is an app that can get you a translation fast, then Language Translator by La Clave Gandora is your best bet. This app was developed with ease-of-use in mind, and is ideal for beginners, thanks to its simple interface. it has just two translation functions, typing and speaking, and they both offer up translations quickly.Language Translator makes it really easy to get from one language to another on mobile. The buttons are relatively large and have flags next to them so you can easily distinguish between the languages, and the large font size makes it easy to see your translations. It's rated highly (4.4) on Google Play and has had more than a million downloads.
https://play.google.com/store/apps/details?id=laclaveganadora.translator
Best for individual words: PONS
PONS Online Dictionary is a dictionary with translator functions, which means it can give you in-depth descriptions of words. Words often have several meanings, so PONS gives you a few options displayed in a simple interface. For example, the word 'current' could mean 'electrical current' or 'new' and could appear as a noun or an adjective. You need to find out which way the word is meant to be used in order to get the right translation and PONS is great at helping you figure this out.PONS is also great for finding and translating phrases in which to use these words. A suggested phrase for 'current' is 'this version is current,' which is immediately translated on the other half of the screen. This gives you a better understanding of the word in both languages.
Best for voice recognition: Translate voice
Translate voice does voice recognition the best of any of the apps we could find. You can say a word or read an entire paragraph and the app keeps up with you. It is dependent on your smartphone's voice recognition capabilities, so results could vary.Translate voice has the best voice recognition of any translation app
This app is especially helpful for when you are in social situations where typing is impractical, but you still need to push a complicated idea across the language barrier. With Translate voice, you can say these difficult sentences and then play the translation aloud to the other person.
Translate voice is limited by its number of usable functions. If you need something that is more thorough in its translation services, you should probably try one of the other apps down this list.
https://play.google.com/store/apps/details?id=com.ticktalk.translatevoice
Best for accuracy: iTranslate
If you need a sentence or two translated, iTranslate will give you the most accurate results. It is equipped to handle more than 90 languages, and though this is just a small fraction of the total languages in the world, it will be useful in the majority of situations you may find yourself in.iTranslate is also the best app to use for typing or copying text. The swipe feature quickly copies blocks of text and translates them effortlessly. If you find something in your translation that you may need later, you can save it in your favorites.
While the voice recognition is not the best, it does have an amazing audio function that can read back translations in different dialects. For instance, you can choose between British, American and Australian English. You can also have the text read back to you more slowly.
https://play.google.com/store/apps/details?id=at.nk.tools.iTranslate
Best all-round app: Google Translate
Google Translate is the standard translation app that serves most purposes. Google Translate is reasonably accurate and has a ton of features. If you need an app that does everything you need, plus things you never thought you needed, then Google Translate is the ticket. It's very popular, with more than 100 million downloads and a solid 4.4 rating on Google Play.If you need a solid multi-function translation app, then Google Translate is your best bet.
The type-translate function currently supports 90 languages, which are also supported if you want to take a picture and have it translated or use your finger to write the words. Two-way automatic voice translation is limited to 40 languages.
The coolest feature of Google Translate is the instant camera text translation, which instantly translates public transportation schedules, warning signs, menus and so on from a photo you take. The size or font of the text does not matter, Google Translate will recognize it and instantly translate it. This function is limited to 26 languages, but works incredibly well, and you will be amazed at the number of instances when it comes in handy.
https://play.google.com/store/apps/details?id=com.google.android.apps.translate