One-person iOS studio · Seoul

Useful apps, built right.

A solo iOS studio in Seoul — apps that pull their weight and hold up in daily use.

3 apps shipping iOS 18+ EN / KO / JA No personalized ads

Language · Listening

Dollim

Section-loop listening that trains your ear.

Study · Spaced repetition

A memory booster — powered by AI and FSRS.

Lifestyle · Running

Running weather from a character you’ll actually check.

From the developer

Every feature gets a close look before it ships.