Creative and independent
app studio.

HalalLog plans trips for Muslim travelers.
ILJU reads your Korean saju.

Both apps are free to downloadMade in South Korea

Our apps.

One job each, done properly.

ILJU

Chart. Readings. Today.

A Korean saju (Four Pillars) reading app in plain English, for entertainment and self-reflection.

ILJU daily reading screen: a score out of 100, lucky number and color, and a five-axis chart
Apps
2apps
In the stores
3store listings
Founded
2026studio founded

How we build.

Three rules, both apps.

One job per app.

HalalLog plans trips. ILJU reads saju. Neither tries to be everything.

Plain English first.

Written for anyone who reads English, not for specialists in either subject.

Free to start.

Both apps are free to download and use. Paid extras exist; the basics stay free.

Who makes it.

One person, start to finish.

87Lab is an independent studio in South Korea. The same person designs, builds, and answers support for both apps.

Get help.

Email goes to the maker, not a queue.