Rival Brains
2 Player Games on One Phone
One phone · Two players · Seven battles of wits
Lay the phone flat on the table and sit on opposite sides — the screen splits down the middle, your half faces you, theirs faces them. No second device. No accounts. No internet. Hand it over and you're playing in seconds.
iPhone — coming soonIt's in TestFlight now and headed to the App Store.
On your phone? Scan to install.
Seven duels, all won with your head
🧩Riddle Rumble
Race to crack the riddle before your rival taps the answer.
➗Quick Maths
Mental-math sprints that get meaner every round.
🔁Echo
Watch the pattern flash, then out-remember them.
🔍Odd One Out
Three things belong together, one doesn't. Spot it first.
🔢Sequences
Crack the number pattern and nail what comes next.
🔤Anagram Attack
Unscramble the letters before your rival finds the word.
🎬Movie Quotes
Name the movie behind the famous line first.
🏆The rivalry ledger
Every grudge is remembered — revenge matches, streaks, and superlatives.
Where people actually play it
- Couples waiting for dinner to arrive
- Siblings in the back seat
- Parent vs kid — and the kid winning
- First dates that need a tiebreaker
- Road trips, airport gates, and anywhere two people share one phone