9×16 — Expanding Tic-Tac-Toe

9×16 is a tic-tac-toe game that grows with you. Win and the board expands; lose and it shrinks. Win streaks compound. Master a 3×3 grid and the next round becomes 5×5. Climb all the way to 15×15. FREE MODES • Single Player — you vs AI, expanding boards, escalating difficulty • Time Attack — 90-second score chase, combo × board size PRO MODES (subscription) • Hot Seat — two players, one device • Blitz — 3s or 5s per move vs AI • Defender — don't let AI win; draws count as victory • Survival — streak chase, escalating boards, one loss ends the run • Online — play remotely with friends, 30s per turn, QR-code invites DESIGN Hand-tuned monospace typography, calm dark and light themes, a minimalist board, and pleasing animations. No ads, no tracking beyond crash diagnostics. PRO SUBSCRIPTION The Pro subscription auto-renews monthly until cancelled. Cancel anytime in your Google Play subscriptions. Single Player and Time Attack remain free forever. Terms: https://9x16.app/terms.html Privacy: https://9x16.app/privacy.html