Per's VL2 suggestion is certainly a good one. The microphone stand mounted touch interface is probably good for your act, Amy. But it also provides a lot more firepower/effects than you’re looking for (good thing? bad thing?).
An alternative, simpler pedal that sounds great is the Flashback (also TC Helicon):http://www.tcelectronic.com/flashback-delay/
It’s essentially just a delay pedal, but the knobs make it very easy to get all the sound support you’re looking for — without lots of confusing extras (though it does have a simple looping function too). There are two other versions of the Flashback (mini, X4, Triple), but this mid-grade one is likely the one you want.
I’ve used this nifty little thing to turn my signal to stereo and send it to my RC3 looper for many solo vocal gigs. Very simple & compact, very full sound, very nice price ($100 bucks). Hope that helps!
From: Amy X Neuburg <firstname.lastname@example.org>
Subject: vocal effects processors?
Date: July 25, 2015 at 12:59:42 AM MDT
I bet you folks will have some suggestions for inexpensive live vocal processor pedals.
For those rare gigs where I’m just singing (not schlepping all my gear), I like a little reverb on my voice, and occasionally a tube distortion effect or a delay. Many of the little art houses where I frequently play have no effects in-house, so I bring my old Dynachord rack unit and hook it up to their mixer as a send. Sounds great.
But this is a pain, and I can’t change effects from the stage, so I’m thinking about a pedal or other small device to use like an insert. This will color the sound, I realize, so I wonder if anyone knows of a particularly clean one. I’m okay without huge programming capability — some good presets with a few adjustable parameters would be fine. Do not need looper, do not need harmonizer, do not need auto-tune (blech!). Does something this simple even exist?
I see a TC Helicon Single R1 that does ONLY reverb. That’s TOO simple.
Amy X Neuburg