If you are operating out in the field or just need a swr meter for the home base station then the iPortable IP30Z swr analyzer may be just the thing you need.
I use it all the time with my various field qrp antennas most notably the Buddipole and Buddistick
I bought it direct from iPortable years ago and has been a trusted tool for me and is small and compact enough to fit in an Otterbox. Note the knob protrudes so i drilled out a hole on the box and glued a bottle cap to cover it.
This thing just works reliably and has out performed the chinese junk I tried out with graphing displays in the past. The 9V battery lasts a long time and no need to charge up any internal batteries or the such.
Turn it on and it comes to 20m by default and then just press the band button to switch bands and then adjust your step size and tune across to check your swr.
The newer analyzers have a sweeping display but then i dont need to want to have to worry about the batteries being charged up before using it.