Double-J Studio

Double-J Studio

Making SaaS that people actually use

Badges

Gemologist
Gemologist
Tastemaker
Tastemaker
Gone streaking
Gone streaking

Maker History

  • Seosa
    SeosaAI co-writer for serialized web novels
    May 2026
  • Bloom Vocal
    Bloom VocalThe AI vocal coach that tells you what you're doing wrong
    May 2026
  • 🎉
    Joined Product HuntApril 24th, 2026

Forums

Double-J Studio

29d ago

Seosa - AI co-writer for serialized web novels

Seosa is an AI co-writer built for serialized web novels. Set up your world & characters, generate episodes from outlines, then run multi-angle quality reviews — while staying consistent past chapter 50. No subscription. Credit packs from $2.90. 50 free credits on signup.
Double-J Studio

1mo ago

Bloom Vocal - The AI vocal coach that tells you what you're doing wrong

Most vocal apps give you a score. Bloom Vocal tells you why your voice cracked on that note — and what to fix. After a few sessions, the AI figures out your vocal pattern. are you chest-pulling? locking your larynx? flipping when you shouldn't? and routes you to the exercises that actually address your problem. It's like having a teacher who's heard thousands of voices and still focuses entirely on yours.
View more