I started developing this app in 2010, to get me through JLPT, and it has been updated ever since. If I needed a feature, I added it. If it bugged, I unbugged. Most of my Japanese was probably learnt (on rush-hour, Tokyo trains) using this very app. Made by a learner for learners. Thanks for your support!
◆ Writing Tutor
View 6500+ kanji/kana interactive stroke order animations and be guided how to write each one. When ready, test your skills in study mode.
◆ Full Dictionary
Drawing from a database of over a million entries including place names, given names, company names, kanji and examples. Search using romaji, kana or SKIP. Full breakdown of kanji showing radicals, particles, similar kanji and compound nouns. Example sentences are broken down phrase by phrase, word by word.
◆ Audio
8000 words spoken by a native speaker (as opposed to "not quite right" synthesised audio) covering the complete N1-N5 vocabulary. Auto-repeat audio for perfect pronunciation.
◆ SRS Leitner Study Method + Calendar = Awesomeness
Just set a future date and let the scheduler tell you when and what to study, everyday. No setup required.
◆ Translate
Copy/paste Japanese text and have the words auto-translated into detailed flashcards.
◆ RSS News Feed
Read today's headlines in Japanese, translated into furigana and English definitions ready for study.
◆ Decks
Complete kanji and vocabulary required for the JLPT exams (N1 to N5), school grade kanji (grades 1 to 9), kana and joyo kanji (new and old).
◆ Highly Detailed
All kanji, radicals, particles, words, compounds, similar looking kanji, and examples are "tapable" linking you to something new - save anything along the way and make new decks.

Details:
◆ Full 2-way dictionary.
◆ A beautiful, free scrolling "map" interface
◆ 6500+ interactive kanji animations + writing trainer
◆ Complete JLTP 1-5 vocabulary and kanji decks
◆ Hiragana and Katakana decks
◆ Human audio for N1-N5 vocabulary (8000+ words)
◆ Translate any text into furigana and English
◆ Live RSS Japanese news feed for new content everyday
◆ Details for 6355 kanji: radicals, elements, SKIP, dict codes, etc.
◆ Detailed breakdown of example sentences
◆ "Similar" kanji display
◆ Adjustable SRS study algorithm
◆ Scheduler
◆ Rolling progress chart
◆ iCloud background syncing - easily edit decks on your Mac
◆ All data is hyper-linked
◆ Freely create your own decks
◆ Edit, delete and move cards between decks
◆ In-app import (no need for iTunes)
◆ External keyboard support
◆ Extensive options
◆ Rock solid; loved and looked after by a kanji geek since 2009
◆ Full and detailed help
◆ No ads, downloads or "RATE ME!!!"
◆ Ridiculously good support
◆ Universal app. iOS12+. Compatible with all models.
"The only way I'd be more satisfied with this app is if it could just transmit the info directly into my brain.". App Store review.
Twitter: @justininjapan
Web + user guide: www.stickystudy.com
The SKIP system for ordering kanji was developed by Jack Halpern (www.kanji.org), and is used with his permission.
KanjiVG (animations) copyright Ulrich Apel.
I'm Justin. I moved to Japan in 2002 and I'm married to my Japanese wife (lovingly called "Spellchecker"). I've taken the JLPT tests up to N1 (yes, I was there) using this app. I speak, read and write Japanese fluently and I'm an overactive developer (nearly 40 years) who just can't turn his computer off and lead a normal life.