Android - Turn off vibration notification for ALL apps at once

Update: Android Pie (9.0) finally allows you to disable all the vibrations. Go to Settings app > Accessibility > Vibration. Some ROMs still don't have this option, in which case you may want to check out my old solution.

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Old solution - applies to Android Oreo or older (<9.0):

Stock Android does not have an option to disable all vibrations. This frustrated me as well, so I made an app that can turn them off system-wide - https://blade.sk/projects/global-vibration-toggle/

A rooted phone is required, as there is no API for disabling vibrations.

The app is basically a user-friendly wrapper for this shell command: chmod 444 /sys/devices/virtual/timed_output/vibrator/enable.