I have had a couple Tickr’s but I replaced them with the Tickr Fit arm band. Can’t say enough good things about it. I use it on my upper arm under my jersey and it works great. Just have to make sure it’s charged and your good to go.
I have a Scosche Rhythm24 as well and it’s great too. I just prefer the Tickr fit as it’s a little slimmer and more comfortable in my opinion.