30x per second
Your posture is your power
Sit up or
your screen
goes dark.
Two anime guardians sit on your shoulders and fight skeleton enemies. Your posture powers them. Slouch too long and they die — and your entire screen locks until you hold perfect posture for 20 seconds straight.
📷 Camera tracked🎧 AirPods aware🔒 Screen lock
Good postureWave 3
Posture92
HP84⚔ Wave 3Score 260
Live battle HUDReal consequences
Slouch and your guardians start dying.
Their attacks weaken. Their shield drops. Enemies land hits. HP drains. You feel it happening on screen the moment your posture slips.Screen lock
HP hits zero and your screen goes dark.
A fullscreen overlay covers everything. Can't close it. Can't cmd+tab. Hold perfect posture for 20 seconds to unlock. Drop and it resets.Why it works
Every other posture app sends a notification. You dismiss it.
Posture Sensei doesn't remind you to sit up. It makes slouching cost you something you care about — your screen, your characters, your game.
You can't swipe this away
A notification gets dismissed. A dying guardian and a locked screen don't. Your body has to fix the problem.
The feedback is instant
Not "check your posture" after 30 minutes. The game reacts the second you slouch. Correction happens while it's still easy.
You actually care about the outcome
You feel it when your guardians get hit. That emotional reaction is what makes you sit up — not willpower, not logic.
Your brain rewires itself
After a few screen locks, you start self-correcting automatically. The habit forms because the loop is real, not because an app told you to sit up.
How it works
Open the app. Sit down. Let the game train your body.
Your camera watches your posture. Your guardians fight. Your body decides who wins.
01
Open the app before a long sit
Start a coding block, study session, or work sprint. The battle runs alongside your work.
02
Guardians appear on your shoulders
They anchor to your detected shoulder positions via your camera. They move when you move.
03
Skeletons attack constantly
Enemies swarm from every edge. Your guardians fight back — but only at full power when you sit up straight.
04
Lose the fight, earn it back
Screen locks. Hold perfect posture for 20 seconds. After a few of these, you start correcting before the guardians even take damage.
Meet the cast
Your guardians and their enemy
The actual in-game characters. They sit on your real detected shoulders and fight with whatever power your posture gives them.
Left shoulder · Melee
Blade Guardian
Close-range fighter with a glowing cyan blade. Slashes through any skeleton that gets too close.
Right shoulder · Ranged
Gun Guardian
Dual-wielding energy pistols. Fires homing bolts that track enemies across the screen.
Enemy · All directions
Skeleton Invader
They swarm from every edge. They shoot back. And they never stop coming.
Three states of posture
Good. Slipping. Gone.
The worse your posture gets, the more the game punishes you — until your screen disappears entirely.
Sit straight and everything works
Full damage. Shield up. HP regenerating. Enemies getting pushed back. The session feels calm and controlled.
Slouch and it falls apart fast
Damage drops. Shield flickers. Enemy hits land. HP drains. You have maybe 30 seconds before things get bad.
Lose and your screen disappears
Guardians fall. Fullscreen lock. On Mac it covers every window at the OS level. 20 seconds of perfect posture to get it back.
The screen lock
Not a notification. Your screen is gone.
When your guardians fall, everything stops. Your screen is covered at the OS level. The only way back is holding perfect posture for a full 20-second countdown.
Slouch and enemies break throughYour guardians weaken. Shield drops. HP drains. It happens fast.
HP hits zero. Screen locks.Fullscreen overlay. Can't close it. Can't switch apps. Your body has to fix this.
20 seconds of perfect posture to unlockDrop during the countdown and it resets. After a few of these, you start self-correcting before it ever gets this far.
Guardians defeatedHold good posture to unlock
201205
FAQ
Common questions
Everything you need to know before downloading.
Does it actually block my screen?
Yes. On Mac, a fullscreen panel at the screensaver level covers everything. You can't cmd+tab, you can't close it. Hold good posture for 20 seconds to unlock.
Do I need AirPods?
No. The camera handles everything. AirPods Pro add optional head-tilt tracking for extra accuracy, but they're not required.
Does it work in the background?
Yes. Minimize and keep working. The camera still watches. Enemies still attack. Slouch and your guardians still die.
Is this a subscription?
No. One-time purchase on the Mac App Store. No tiers, no recurring charges, no accounts needed.
Is my camera data private?
All tracking runs on-device via Apple Vision. Nothing is stored, nothing is sent. We couldn't see your camera feed even if we wanted to.
One-time purchase · Mac App Store
Buy once. Own it forever.
Camera posture tracking, anime tower defense, OS-level screen lock, optional AirPods head tracking, and every future update. No subscription, no accounts.