Learn
The evidence, with its limits stated.
The same short reads that ship inside the app: the biomechanics behind posture awareness, each source named — and each source’s caveats named too. They explain why noticing matters; they aren’t claims about Plumb itself.
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Start here · 2 min
How your score works
What the numbers mean — and why your trend stays honest.
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Evidence · 2 min
What Nachemson actually measured
Intradiscal pressure, sitting vs standing.
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Evidence · 2 min
Tech neck: the 60° myth and the real numbers
Hansraj 2014, modelled vs measured.
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Technique · 2 min
Why duration matters more than the angle
Creep phenomenon, sustained flexion.
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Technique · 2 min
Disc-friendly movement: the McKenzie extension principle
A movement direction, not a posture — and where Plumb’s job ends.
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Clinic · 2 min
The plumb line: how physios assess posture
The century-old side-view assessment Plumb is named after.
Prefer them in your pocket? All six live inside the app — free, no sign-up.
Download on theApp Store