A precision mechanical gauge with correct range for your application is one you can trust. For your application, I recommend a 0 - 60 PSI mechanical gauge. If the scale goes up to higher values than 60 PSI, it usually means the precision and accuracy are worse.
With precision mechanical gauges, the accuracy is typically 1% of the maximum reading, so in your case, it would be 0.6 PSI. For 0 - 140 PSI, it would be 1.4 PSI. So here you can directly see the benefits of using the correct range.
Electronic ones can be pretty good too, but then you'll have to renew the batteries occasionally and you can never know if low battery voltage results in sightly incorrect readings.
Although this is not a product recommendation site, I'll provide one link for manufacturers of precision mechanical tire pressure gauges: https://www.flaig-praezision.de/en/products/tyreinflatorgauge
Note that if you have a donut spare, it typically has higher pressure and you cannot use 0 - 60 PSI gauge for the donut spare because the pressure is over 60 PSI.
Don't trust the gauges of cheap Chinese pumps! I once pumped my car tires to what I believed to be 2.3 bar. Turned out the real pressure was much, much higher, because the cheap Chinese pump had a low quality gauge. Typically, a cheap Chinese pump costs a fraction of a good precision mechanical gauge. Then when you consider that only a fraction of the pump cost goes to the poor gauge on the pump, you realize that the poor gauge costs a fraction of a fraction of a good gauge.