| Compare Amazfit Stratos vs Apple Watch Series 3 vs Fitbit Versa | 
                                                
                                                    |  | Smartwatch | Smartwatch | Smartwatch | 
                                                                                                    
                                                        | Release / Update | 2018 | 2017 | 2018 | 
                                                                                            
                                                    | Suggested Price | $199 | $279 | $199 | 
                                            
                                                |  |  |  |  | 
                                                    
                                                        | Activity & Fitness | 
                                                                                                            
                                                            | Calories |  |  |  | 
                                                                                    
                                | Cycling (Bicycling) |  |  |  | 
                                                            
                                | Distance |  |  |  | 
                                                            
                                | Heart |  |  |  | 
                                                            
                                | VO2max (Oxygen) |  |  |  | 
                                                            
                                | Sleep |  |  |  | 
                                                            
                                | Steps |  |  |  | 
                                                            
                                | Swim |  |  |  | 
                            
                                | Battery | 
                                                            
                                | Duration | 5 days | 18 hours | 4 days | 
                                                            
                                | Charging | Rechargeable | Wireless charging | Rechargeable | 
                            
                                | 
                                        
                                     | 
                            
                                | Compatibility | 
                                                            
                                | Android |  |  |  | 
                                                            
                                | iOS |  |  |  | 
                                                            
                                | Windows Phone |  |  |  | 
                                                            
                                | Mac |  |  |  | 
                                                            
                                | Windows |  |  |  | 
                            
                                | Connectivity | 
                            
                                | Bluetooth |  |  |  | 
                            
                                | Cellular |  |  |  | 
                            
                                | GPS |  |  |  | 
                            
                                | NFC |  |  |  | 
                            
                                | Wi-Fi |  |  |  | 
                            
                                | Display | 
                            
                                    | Color |  |  |  | 
                                
                                    | Resolution | 320x300 | 38mm: 340x272 42mm: 390x312
 | 300x300 | 
                                
                                    | Size | 1.34" | 1.5" 1.65"
 | 1.34" | 
                                
                                    | Touch |  |  |  | 
                                
                                    | Type | OLED | AMOLED | OLED | 
                                
                                    | Functions | 
                                
                                    | Audio Speaker |  |  |  | 
                                
                                    | Clock |  |  |  | 
                                
                                    | Phone |  |  |  | 
                                
                                    | Vibration |  |  |  | 
                                
                                    | Voice |  |  |  | 
                                
                                    | Camera |  |  |  | 
                                
                                    | Hardware | 
                                
                                    | Accelerometer |  |  |  | 
                                
                                    | Barometer or Altimeter |  |  |  | 
                                
                                    | Ultraviolet Sensor |  |  |  | 
                                
                                    | Water Resistance | 5ATM (50 metres) | 5ATM (50 metres) | 5ATM (50 metres) | 
                                
                                    | Notifications | 
                                
                                    | Phone |  |  |  | 
                                
                                    | Emails |  |  |  | 
                                
                                    | Texts |  |  |  | 
                                
                                    | Software | 
                                
                                    | Operating System | Propietary | watchOS 4.0, upgradable to 5.2.1 | Fitbit OS | 
                                
                                    | Apps |  |  |  | 
                                
                                    | Music |  |  |  | 
                                
                                    | More Info & Buy | 
                                
                                    | Storage |  | 16GB, 768 MB RAM | 2.5GB | 
                                
                                    | Extra |  | Colors: Space Black, SilverBuild: Stainless Steel/Ceramic back
 3D Touch display
 Bluetooth 4.2
 |  | 
                                
                                    | Pros | Amazfit Stratos Pros
 | Apple Watch Series 3 Pros+ Adds barometer to GPS and swimproofing
 | Fitbit Versa Pros+ Lightweight design
 + Relatively low price
 | 
                                
                                    | Cons | Amazfit Stratos Cons
 | Apple Watch Series 3 Cons- Battery life takes a major hit when making calls or during GPS workouts
 | Fitbit Versa Cons- No GPS
 - Feels a little cheap and childish
 | 
                                
                                                |  |  |  |  |