[adm4]

guitar detuner that uses accelerometer instead of microphone, it doesn't really work, but amazing to see how sensitive they are.

[tgv]

It also shows that it can leak all kinds of other information.

[codethief]

…which is why both Android & iOS put high-frequency access to the accelerometer behind an additional permission AFAIR.

[tiluha]

It really is crazy. Placing my phone on my chest lying down i can clearly see my heartbeat on the graph

[adm4]

good idea https://tautme.github.io/phone-sensors/heartRate.html , try setting it on the ground and see how sensitive it is to foot steps.... or earthquake https://seismosense.com

[virgil_disgr4ce]

it detunes guitars?

[pimlottc]

It tunes every string to D