The stand up reminder app for chairs that won’t let go

Why “I’ll stand up more” never survives Tuesday

Nobody plans to sit for four unbroken hours. It happens because sitting is invisible: no signal fires when you cross the one-hour mark, and focus erases your sense of time. By the time your hips and lower back speak up, the damage of the day is done. The fix isn’t discipline — it’s a system that notices the clock so you don’t have to.

What happens when you sit too long

• Hip flexors shorten and glutes disengage, which shows up later as lower back ache — see our guide on lower back pain from sitting all day.
• Your neck and shoulders creep forward toward the screen and stay there.
• Circulation slows, and with it your energy and focus — the classic mid-afternoon slump.
• Eyes lock at screen distance, driving digital eye strain.

None of this requires a dramatic fix. It requires standing up, moving for under a minute, and doing that regularly.

How Stiff gets you out of the chair

1. Schedule: set work days, hours, and a reminder rhythm (every 30–60 minutes).
2. Prompt: a notification with actual personality arrives — Stiff the sloth is politely unimpressed by your sitting record.
3. Move: a guided 30-second exercise appears: stand-and-stretch moves, seated resets, hip openers, or eye breaks. No equipment, no changing room.
4. Score: each completed break earns XP toward your daily goal, building streaks and levels that make consistency weirdly satisfying.

Better than a smartwatch buzz

Fitness-tracker stand alerts are easy to game — wiggle your wrist, alert dismissed. Stiff asks for something more meaningful: a real, timed stretch, tracked toward a goal you can see. And because it works around your calendar (with a snooze for meetings), the prompts keep their authority instead of becoming background noise. If you want the reminder plus the full stretching system, start with our stretch reminder app overview, or see what to do once you’re standing in desk stretches.