Vibrate+

Vibrate+ can help you alleviate stress and stimulate feelings of relaxation. It is also very simple and easy to use!
It works only on iPhone 8 or higher because it use NEW HAPTICS ENGINE.
-- APP FEATURES -- 
Included are 12 unique developed vibration patterns. Provide a calming sensation in as little as 30 seconds. Help enhance one's sleep quality. Vibrate+ help people fall asleep up to 40% faster. 
Features: 
+ Continuous vibrations 
+ Set haptic strength and speed 
+ Choose from over 10 different vibration patterns 
+ Easy to use power on/off button 
+ Simple and easy to use user interface 
+ Relax and relieve stress after a long day 
+ Aid with neck or other muscle pain 
-- STRENGTH LEVELS -- 
Vibrate+ is a new strongest vibrator app on the market. We have three strength settings: 
Soft: Perfect for meditation. Meditation with our app is a simple practice available to all, which can reduce stress and increase calmness. 
- Medium: The app will help you if you have a more sedentary job. Just place the phone in your back and you will focus on what really matters. 
- Hard: Perfect for sport people. You can massage the muscles that have worked the most to increase blood circulation in the body and reduce the build-up of lactic acid. 
-- PREMIUM ACCESS -- 
Premium Access, will unlock all the different vibration patterns and strength levels, and all future upgrades. You can enjoy the app a truly ad-free experience. You'll fully understand what makes this vibrating app so unique and effective. Also, please support our small family business :D 
-- Not vibrating? -- 
if not vibrating 'vibrate' and 'System Haptics' must be enabled in your device sound settings. Settings -> Sounds & Haptics. 
* Please note: this app only works on iPhones (iPads & iPod Touches don’t have an internal vibrator) 

Term of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/