Side by side
IRODORI Japanese Online Course vs Sotto
Both stand on language learning apps. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free plan AndroidiPhoneMac+2
IRODORI provides a free, structured Japanese course with multimedia lessons, practice choices, downloadable references, and progress tracking. Learners should note the listed level information, course-period condition, and non-official status of its certificate.
Visit IRODORI Japanese Online Course Free plan AndroidAPIiPhone+5
Choose Sotto for self-hosted CEFR study with adaptive memory, source-based classes, and configurable speech or AI services. Consider another option if you want a ready-made hosted service or prefer not to manage provider accounts and infrastructure.
Visit SottoThe facts
| IRODORI Japanese Online Course | Sotto | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | Not published | Not published |
| Runs on | Android, iPhone, Mac, Web, Windows | Android, API, iPhone, Linux, Mac, Self-hosted, Web, Windows |
| Lowest paid plan | Free or on request | Free or on request |
| Plans published | 1 | 1 |
| Maker | IRODORI Japanese Online Course | Not published |
| Website | irodori-online.jpf.go.jp | github.com |
| On language learning apps | #51 of 278 | #10 of 278 |
IRODORI Japanese Online Course: what it does well
- Free course
- Six-step lesson structure
- PDF study materials downloadable
- Progress and portfolio tracking
- Android practice works offline
What to know first
- Certificate is not official proficiency proof
- Course periods apply
- Technical requirements specify newer operating systems
- Guide currently lists Elementary 1
Sotto: what it does well
- Covers grammar, reading, listening, speaking, and writing
- Uses SM-2 spaced repetition for adaptive review
- Builds leveled classes from personal source material
- Supports fully offline language-learning setups
- Offers web, desktop, terminal, and workbook access
What to know first
- Users pay configured AI and speech providers directly
- Cloud-sent content follows those providers’ terms
- Windows desktop setup uses WSL2
- Managed hosted offering is planned rather than available
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