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Trivia Quest and Sudoku Adventure are on the App Store and Google Play. Pocket Diary and Turnlock are in pre-release.

Trivia Quest Daily Challenge home screen on an iPhone

Trivia Quest question with a short explanation after answering

On the stores

Trivia Quest

Daily trivia for curious people. Finish today’s set in a few minutes, dig into categories when you want more, or invite friends with a short room code.

Ten Daily Challenge questions every local day
Short explanations on most answers
15+ categories · English, Hindi, Spanish catalogs
On-device progress · optional compete rooms
Optional reminder · no ads · no IAP

Explore Trivia Quest

Official landing & friend-room invites: jointrivia.app

Sudoku Adventure themed map with lesson nodes for kids

Sudoku Adventure buddy coach explaining a 6×6 Sudoku lesson

On the stores

Sudoku Adventure

Kid-friendly Sudoku that teaches logic step by step through short coached lessons on a themed map.

Ages 7–12 · learn as you play
4×4 → 6×6 → earned 9×9
Theme buddy coaches · unlimited undo
No timers · no lives · offline progress
No ads · no IAP in v1

Explore Sudoku Adventure

Pocket Diary closed journal cover on the home screen

Pocket Diary lined writing page with today's entry

Pre-release

Pocket Diary

A quiet offline journal. Open today’s cover, write on lined pages, put away when you’re done.

Closed journal on home — tap the cover to write
Lined pages with optional local photos
Export a PDF that looks like the book
Optional passcode lock · For / Written dates
No accounts · no sync · data on this device

Explore Pocket Diary

Pre-release

Turnlock

Rotate circular discs until both colored paths connect, then watch the current run through the world.

Dual-color source-to-sink puzzles
Ten worlds · 375 built-in puzzles
No timer · every move autosaves
Playable free core with optional rewarded extras and Turnlock Plus

Explore Turnlock