I recently compared those 3 kitchen scales from Amazon. They allow to display nutritional (macro and micro nutrients alike) info for each food you weigh.
Here’s a quick summary:
RENPHO Digital Kitchen Scale (19.99 €)
Pros:
- The App is fully functional (not a given for all scales)
Cons:
- No ON button (need to press really HARD on the scale to turn it on, not user friendly)
- No OFF button (continues to emit bluetooth way longer than necessary)
- App requires registering
- App requires phone to be connected to the internet
- Bloated and convoluted app
- App is very slow as everything requires an internet request
NBPOWER Kitchen Scale (9.99 €)
Pros:
- Tactile ON/OFF button (press 3 seconds for off)
- Simple and beautiful app
- App more responsive than Renpho
Cons:
- Impossible to register custom foods that have less than 1g of carbs per 100g (e-g: salmon) (kinda sucks if you’re doing keto or or something like that)
- App reqiqures registering
- App requires phone to be connected to the internet
AIRMSEN Digital Kitchen Scale (19.99 €)
Pros:
- App works 100% offline, no internet connection necessary
- App does not require registration
- App does everything it should
- ON/OFF switch
- Most beautiful of the pack
Cons:
- The buttons in the app are too small and to close to the screen corners to be easy to press.
- User Interface could be more graphical in showing nutrients in various places