Here's a portion of a display from an iOS app that allows users to connect to a Wireless Valve Control device.

UPDATE: My question is regarding the -42 dBM and 2.97V labels.

enter image description here

As a code implementor, whether to show a number, an analog graphic, or both, has always been kind of "what seems to work best".

When space gets small, icon only is often nice. Icons only here might work, but the numbers add a bit of increased fidelity to the reading and help communicate what the icon is actually describing.

Is there a more rigorous/disciplined approach to when one should include the numeric value of a status value? Other than "that looks best/is nice to have"?

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    what's the larger context here? Is this part of a busy dashboard? Is it front and center? Also, is this number just an identifier? Because you also mention a status value. Is that part of the number? Any deeper context might help the community... – Mike M 2 days ago
  • Front and center on a mobile phone. Not a very busy screen. This panel and a couple of others with a similar amount of white space. – Travis Griggs 2 days ago
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    If that's all you're showing, I'd say the numbers are good. I would rather have clarity and knowledge over simplicity as a user, given that my attention is not in danger of being overwhelmed here. In a narrow status bar it would be different. – Luke Sawczak 2 days ago
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    If your users are people that will understand the difference between dBm and voltage then can't see why you shouldn't show it to them, adds more context and precision. If it's for anyone in the general public, maybe not show? – Shane Hudson 2 days ago
  • Just make sure to show the relevant numbers and that users understand them. Also be sure it doesn't harm the user's workflow: If a quick glance is important in situations where time matters and precision is not needed, the numbers might only distract. – jazZRo 2 days ago

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