My use case for Gemini - workout routines
This is not the most sophisticated use, granted. But it helps me a lot.
I have been putting together physical routines of various kinds. For example, I ask Gemini to put together a beginner-friendly yoga routine, and it does so. Then I ask it for a second routine using different poses but the same prompt parameters, and it does that too. Then a third routine. In this way, I get three good routines I can alternate between.
In the prompt I ask for full instructions, the anatomy affected, why a pose is included in the routine, mistakes and bad form pointers to avoid and variations to make the pose easier and more difficult. Gemini provides all this.
I have done this for beginner, post-beginner and intermediate yoga routines and bodyweight routines. It has also provided specific routines for hip mobility and core strength.
I have tried out the various routines provided, and I am happy with them all. That's the test, right? The instructions make sense, the anatomy is correct, the difficulty levels are consistent and so on. All this from just the free version. I don't use any special paid tier or subscription model.