Learn Japanese on Clozemaster

Summary: Clozemaster is a Web & iOS app that helps language learners practice and learn new words using fill-in-the-blank sentences. It's another gamified app like Duolingo.
Price: Free
Devices: Android, iPad, iPhone, and Web

Learn Japanese on Tandem

Tandem is a free platform with a simple premise: there is probably someone out there who is learning your native language, and whose native language you want to learn. So they put you in touch with them. When you sign up, Tandem will review your application to make sure their platform remains safe and that the person you get matched with is also a keen language learner.
Price: depends
Devices: Android, iPad, iPhone, and Web

Learn Japanese on Awabe

Awabe is a flashcard language learning app on Android. It focuses on vocabulary, offering as much as 4,000 words for each language.
Price: Free
Devices: Android, iPad, and iPhone

Learn Japanese on Rosetta Stone

Rosetta Stone is a language-learning app that started in the 90s for auditory learners.
Price: Free
Devices: Android, Apple Watch, iPad, iPhone, and Web

Learn Japanese on LingQ

LingQ is a language learning app that uses the same logic for learning a new language as learning your native tongue: using content you already like. They have books, news, podcasts, sports coverage, politics, culture, and food to name a few.
Price: Free
Devices: Android, iPad, iPhone, and Web

Learn Japanese on HelloTalk

HelloTalk is a language learning app that allows users to communicate with others in different languages. It has both a free and premium version, and offers a variety of features to help users learn new languages.
Price: Free
Devices: Android, iPhone, and Web

Learn Japanese on LuvLingua

LuvLingua is a language learning app that uses an interface that is more geared towards a younger audience. It's focused on vocabulary learning and listening skills. The basic app is free but the more advanced ones are paid.
Price: Free
Devices: Android, iPad, iPhone, and Web

Learn Japanese on Brainscape

Brainscape is a customizable flashcard language learning app where you can pick the language you want to learn and then create your own personalized learning path. It prides itself on being "the world's smartest flashcard app".
Price: $9.99/month
Devices: Android, and iPhone

Learn Japanese on AccelaStudy Essential Apps

AccelaStudy is a series of apps that allows you to learn new languages. It's focused on flashcards and space repitition, with each language having its own separate app (for example "Accelastudy Learn Spanish")
Price: $9.99/month
Devices: iPad, and iPhone

Learn Japanese on Live Lingua

Live Lingua used to specialize in so-called "public domain" courses - it used to be a database of language learning material that is not copyrighted. Now, the platform offers 1-on-1 language courses in select languages, they offer to put you up with a handpicked, native tutor. Currently, they have an offer for a free first class in Spanish.
Price: depends
Devices: Web