Which of these Japanese learning apps should I use?

Each one teaches a single thing and measures it separately: Kaname: Japanese Grammar – JLPT practice: N5 N4 N3 N2 N1; Bunmyaku — Japanese Reading – Read Japanese in Context; Katsuyokei: Conjugation – Japanese Forms & Drills; Joshi: Japanese Particles – Drills for は, が, に, で; Kazoekata: Japanese Counters – Master Japanese Counters; Kuzushi: Casual Japanese – Anime, drama and slang; Shindan: Japanese Level Test – JLPT placement: N5 N4 N3 N2 N1; Keigo: Polite Japanese – Formal Japanese for work; Kifuku: Japanese Pitch Accent – Pronunciation and listening; Onomatope: Japanese Mimetics – Manga and anime vocabulary

Japanese in ten apps

Ten apps for learning Japanese, each about one thing: grammar, reading, conjugation, particles, counters, casual speech, keigo, pitch accent and mimetics.

Which problem, which app

If this is your problem	App
Mixing up similar patterns? See them side by side in real sentences, not just in prose. Plus scanning Japanese from a photo and an AI check on sentences you write.	Kaname: Japanese GrammarJLPT practice: N5 N4 N3 N2 N1
You know the kanji. You know the word. But can you read it when it turns up inside a sentence? That is a different memory — and this trains it.	Bunmyaku — Japanese ReadingRead Japanese in Context
Verb forms come from rules, not from memory. Drill them until 書いて arrives before you have finished thinking about it.	Katsuyokei: ConjugationJapanese Forms & Drills
Knowing what に means is not the same as knowing when it is で. Nine hundred sentences, one blank, four particles — until the right one arrives on its own.	Joshi: Japanese ParticlesDrills for は, が, に, で
Stop guessing how Japanese counters are read. 三本 is さんぼん, 六本 is ろっぽん — and there is a rule behind it.	Kazoekata: Japanese CountersMaster Japanese Counters
Textbooks teach 〜ている. People say 〜てる. Kuzushi drills that gap: recognising a contraction and producing one are scored apart, because they are two different skills.	Kuzushi: Casual JapaneseAnime, drama and slang
Nine apps teach one thing each. None of them can tell you which one you actually need. One sheet under a clock, and the answer stops being a guess.	Shindan: Japanese Level TestComing to the App StoreJLPT placement: N5 N4 N3 N2 N1
Knowing the form is not the same as knowing who to use it on. Too much keigo is a mistake exactly as much as too little – and that half is what nobody teaches.	Keigo: Polite JapaneseComing to the App StoreFormal Japanese for work
Japanese hides a layer the kana does not write. 箸 and 橋 are spelled the same and are not the same word – and the difference is a rule you learn, not a list you memorize.	Kifuku: Japanese Pitch AccentComing to the App StorePronunciation and listening
Japanese onomatopoeia are not arbitrary. 濁点 makes a thing bigger, heavier and less pleasant – understand that and you can guess a word you have never seen.	Onomatope: Japanese MimeticsComing to the App StoreManga and anime vocabulary

All apps

Kaname: Japanese Grammar要
Kaname teaches Japanese grammar the way real command of a language works: it does not ask whether you remember a rule, but whether you can use it.
Bunmyaku — Japanese Reading文脈
You look up a word, you learn it, you tick it off.
Katsuyokei: Conjugation活用形
Katsuyokei drills Japanese conjugation until it becomes automatic.
Joshi: Japanese Particles助詞
Joshi drills Japanese particles until the right one stops being a decision.
Kazoekata: Japanese Counters数え方
Japanese counting is not a number stuck onto a noun.
Kuzushi: Casual Japanese崩し
Textbooks teach 〜ている and 〜てしまう.
Shindan: Japanese Level Test診断
Shindan does not teach.
Keigo: Polite Japanese敬語
The Japanese honorific register is not a list of forms to memorise.
Kifuku: Japanese Pitch Accent起伏
Kifuku teaches Japanese pitch accent – the layer of the language that kana does not write down.
Onomatope: Japanese Mimeticsオノマトペ
Three hundred onomatopoeia are not a list to memorize.