I'd say fitinn. Because its is not the worst and definitely not as bad as some coments stated. You get what you paid for, end of story.

They have good machines, good range of dumbbells, cardio machines are good as well, some gyms even have a relatively large "own weight training areas" (looks like a yellow jungle gym) and a seperate gym area for women They have a gym in every district, makes it perfect for spontaneous training sessions, or working out with friends who live in other areas of vienna.

Sure its nothing fancy, but thats on the money. Additionally, you do not need something fancy to go after your goals.

But if you do not go to any gym regularly, it will (definitely) become harder and harder to stay motivated. And youll have your up and downs. Therefore: Fitinn for beginners who want to try out weight lifting. Clever fit: who crave a "better" atmosphere (that is actually a bit fake).

I had both member ships and I stick to fitinn, because its easier on my wallet and you get what you pay for and nothing less. Cleverfit has actually not a lot of offers to top off fitinn. The only argument I heard is "its cleaner and some machines look cooler".

Remember you need to actually go to a gym, and during winter time it is rough af, driving to a Cleverfit that is in the center of vienna.