Does not mean 'readings are always right'. Measuring in tenths needs temperature control. Ever wondered why micrometers have an isolating pad on the frame?I have Brown & Sharpe, Mitutoyo, and other top-end measuring tools, which is all there were a few decades ago.
But I also now use a stainless iGauging IP54, which has 0.0001 resolution, meaning its 0.001 readings are always right. It was about $30.
A Neiko 01407A (?) is about $17.00. These are much better than the calipers sold under the RCBS, Hornady and other reloading brand names.
Amazon has them.
I bought a cheap (£6) one off ebay and have since checked it against a much more expensive (Mitutoyo) unit and there was no difference on the readout up to 4" over that mine was -0.01mm different to 6".
I also bought an imperial dial caliper (again from eBay) and apart from the marking being slightly less pronounced agrees with the 'inch' settings on my digital version.
For my needs they are perfect, if I was measuring less than 1 thou and needed repeatability and calibration, then Mitutoyo.
HTH
Lidl, £10 digital ones just do the job. If your are really worried why dont you get a Wilson case gauge and problem sorted forever.
D