I have the paid version.

I generally have it set to keep my MacBook Pro at 80% since it is always plugged in. I use the “sailing” mode. I think it helps, but as the author of the tool explains, it’s hard to know for sure.

I do not recommend paying for the software. The paid version will turn itself off every 30 days unless you let it phone home to verify that it’s still authorized. I’ve written/sold software before, so I get the concern about piracy, but this is going too far.

This means you can’t run it on an air-gapped machine. It also means the developer is collecting data tied to your name, address, credit card, IP, and computer usage every month and you can’t opt out. Most distressingly, it means that someday when the author loses interest in the software (or doesn’t renew his domain name, or has a heart attack, or sells it to some unscrupulous corp) the software you paid for will stop working.