Yes. Older devices can use Insight Timer as long as it has the following operating systems:
iOS
- iPhone - requires iOS 13.0 or later.
- iPad - requires iPadOS 13.0 or later.
- iPod touch - requires iOS 13.0 or later.
- Mac - requires macOS 11.0 or later and a Mac with Apple M1 chip or later.
- Apple Watch - requires watchOS 5.0 or later.
Android - requires 5 and up.
Here's how to create an Insight Timer account.