Screen Dimensions vs Age by Serial Number

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

Screen Dimensions compared with Age by Serial Number
Detail	Screen Dimensions	Age by Serial Number
What it does	Read your screen size, resolution and refresh rate live in your browser	Find how old a water heater, furnace or air conditioner is from its serial number
Stage	Not given	Not given
Founded	Not given	Not given
Based in	Not given	Not given
Pricing model	Free	Free
Pricing	Not given	Not given
Key features	Live screen resolution detection in CSS and physical pixels Device pixel ratio measurement Browser window size detection Display refresh rate checker Color range detection Physical screen size measurement with bank card TV size calculator by seating distance Dead pixel test Screen comparison tool at scale Refresh rate test	Water heater serial number decoders for Bradford White, A.O. Smith, State, American, Whirlpool, Rheem, Ruud, Lochinvar Furnace and air conditioner decoders for Goodman, Amana, Lennox, Carrier, Trane, American Standard Water heater and furnace error code lookups Water heater sizing calculator for tank and tankless models Rheem water heater status light meanings Goodman furnace LED flash code reference Rinnai V53De tankless water heater code lookup Rheem tankless water heater code lookup
What makes it different	All measurements run in your browser with no data sent to servers Uses bank card calibration to measure actual physical screen size Reference data cross-checked against manufacturers' spec sheets Distinguishes between diagonal screen size and width/height dimensions Shows real panel resolution accounting for display scaling and pixel ratio	Independent reference not affiliated with or endorsed by any manufacturer Distinguishes manufacture date from installation date and emphasizes condition and maintenance over age Covers safety guidance including gas smell warnings and professional contractor recommendations
Free plan	Not given	Not given
Open source	Not given	Not given
Platforms	Not given	Not given
Public API	Not given	Not given
Community votes	0	0
DR (Domain Rating by Ahrefs)	Not checked yet no change since last check	1 no change since last check
Trust Flow (Majestic)	3	1
Citation Flow (Majestic)	4	17
Referring domains (Majestic)	4	4

4 details filled in for both companies.

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