[graeme]

You may be right actually. I looked for speed tests, and apple insider showed that some apps were faster, some slower.

I do have an old 6, but its not my main phone. I thought it was faster, but haven't used it enough to say.

I would check your battery health under battery settings. If it's under 80% that could be causing the issue.

The 6s has 2 gb of ram, which is a big part of the difference.

[josefresco]

Thanks for the reply. I actually did check my battery, purchasing one of those apps that was trending about 6 months back when news broke of Apple's throttling. Battery is fine - phone is just slow which as you mentioned is probably because of the RAM situation.