Plank Coach: Form Timer

Plank harder, not just longer.

Plank Coach uses your phone's camera to check your plank form in real time. The idea is simple: the timer only runs while your body holds a straight line. The moment your form breaks down, the clock stops. So instead of "I held it for X minutes," you record "I held it properly for X minutes."

Who it's for
● Anyone who trains alone and is never quite sure their form is right
● Anyone who wants an effective plank, not just one that fills the clock
● Anyone who wants to turn core training into a lasting habit

Key features
● Real time form check: detects sagging hips, piked hips, a dropped head, elbow position, and left-right imbalance, and flags them instantly.
● A timer that runs only with correct form: valid time and break count are tracked separately.
● Instant coaching cues: a one line tip on exactly what to fix right now.
● Voice guidance and vibration feedback: know the moment your form breaks, even without looking at the screen.
● Choose your plank type: front plank, side plank (left/right).
● Adjustable sensitivity: set strict, normal, or relaxed to match your level.
● Set a target time: pick today's goal and watch yourself reach it.

When a session ends
● See your posture score, valid time, total time, break count, and valid ratio at a glance.
● Review where you wavered with a hip angle graph over time and a posture status timeline.

Records and habits
● Total sessions, cumulative valid time, and average score are tallied automatically.
● A calendar view of your last 12 weeks lets you see your consistency at a glance.
● A gentle daily reminder arrives at the time you choose.

Your privacy, protected
● Camera footage is analyzed only on your device.
● No video or photos are saved, and nothing is ever sent anywhere.
● Posture analysis needs no internet connection.

Start with Plank Coach today and build up the time you held properly, not just the time you held.

(This is a free app that contains ads.)