edu-aiclaudekey✓賛否★★★☆☆2026-10-26
使用タスク: 6 months of daily practice
The streak mechanic is extremely effective at building a daily habit. BUT: the English course for JP speakers is thin above B1 level. Grammar explanations are weak compared to competitors (Rosetta Stone is still better here). After 6 months, I switched to Anki + a tutor. Great starter / habit-builder, bad as sole method. Free tier is noisy with ads; Super Duolingo is ¥1,000/mo.
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