For example: "Free photo editor" but the free plan does not allow saving.
"Free CMS" but you can only have one page and no ability to edit CSS.
In these cases it's not free or freemium, that's utter BS.
99% of the time it's a no
Additionally, "free" is not always a good thing. It can often make a product or offering sounds cheap. I think it's custom (and nice) to offer a free trial period, especially when you don't even have to put in your credit card. It's a great way to show off the product, customer service, and value. Even offering a free trial at a low entry fee is becoming standard -- take a look at Ahrefs, $7 for seven days.
Good luck.
Freemium basically implies you can use 80% of the product but some juicy functionality is in the other 20%.
For example:
An image to pdf generator, but it can also do OCR. The free product has lasting value, but the premium option adds to it.
A trail is free but not freemium since it has no lasting impact.
I would instead use wording like: - try it - try now - try it now
This still works as an call to action but does not decieve the user
When I was working on AdGrok, which did Google AdWords campaign management, the very first thing that would save thousands per month is to add the negative keyword "free" to their ad campaign: People searching for "free $whateverYourProductDoes" are not going to be easy to convert to paid, and are likely skewed towards subsequently toxic customers.
There are many "freemium" products that hide the limitations of their free offering, which may result in higher initial conversions, but no one feels good when they're "tricked" into using a product.
Clearly enumerate what's the value-add of paying for the thing, and make sure there's actual value to that value-add.
Also: it's (possibly) PR-worthy when you make previously-paid features be free. It's flame-worthy when you push previously-free features behind a paywall. Consider being conservative with your free tier due to this imbalance.
(I'm wrestling with what's going to be in the "free" versus "plus" tier for PhotoStructure right now!).