Pixel per Inch (ppi) a.k.a pixel density is a measure of the quality of a display. PPI tells you how crisp a display would be every other variable being equal. We always calculate ppi when publishing specs of mobile phones and tablets on NaijaTechGuide, so it is not a surprise that we will have to build our very own ppi calculator to make our work easier for us. The good news is that you too can
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