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piliapp.com/vibrator
The webpage is an online app to vibrate your mobile device. It provide several massage modes: slow vibration, medium vibration, rapid vibration, rhythm, progressive, drum and always on. Just adjust slider in the page. No software install required. iPhone doesn't support yet, only support android device with Chrome and Firefox. It's also a demo for JS vibrate API .
Disclaimer: Bad use may harm your health. Excessive use may damage your phone.
ᴅᴇsɪɢɴᴇᴅ ʙʏ pili.app ɪɴ ᴛᴀɪᴡᴀɴ