It is not free. There are no "stop" possibilities to quit an ongoing test.

I seriously love this app, you guys can go ahed and start saying BS about this app but guess what guys? You are completely wrong! I have spoken with the iBoostUp Support Team suggesting more features and almost all of the features I suggested were either made or are in the process of making. So I really recommend you send them a message suggesting the features you would like to see. I know some of you are just going to go ahead and "-1" this review but do you even know how much time it takes to create an app like this. It takes a lot of time, and unlike any other maintenance app for the Mac, this app get's updated every week with super cool new features. I recommend you pay for the premium version since new cool features are on the way but IT IS COMPLETELY UP TO YOU. This app is really easy to use, my grandma could even use this app without a problem, it cleans in deep although more cleaning features are going to be added to "Quick Clean" (I think). Literally, just give it a try, a lot of you use other apps like CleanMyMac, but they do not care about their users as much as this app does. Whenever I send them a message they always respond to me even if I just say something that doesn't need a response. If you do not like the app, uninstall it, and send them a message telling them why you do not like the app: support@iboostup.com , but please do not insult it because the only thing you are doing is making the creators of the app think that it is not useful and it makes them want to stop supporting the app. This app is really good and I am so glad it exists. Thank you iBoostUp!

For a free program it does fine, it does do system upkeep. It has a really good clean interface and is easy to use. I have given it a good work out under MtLion dv2 and it ran great, which tells me that the basic coding in it is solid and reliable. I paid for (in app) for the Premium Package, and it ran well too. The premium pkg was I think less than $10 and includes not only all the current extras but any future extras the developer is working on (I am assuming that he is...). I agree with the other reviewers that this app should either:

1. Name this free app something like iBooster Free or iBooster QuickClean and the Premium version something like iBoosterPro or iBooster+ in the MacApp store. OR

2. Just call it iBooster in the MacApp Store but note right up front at the top that the free version does like QuickClean, Disk Health, Firewall check, Startup Items, etc. and "can be upgraded for $X" to include: (Specify additional functions).

It also needs to say up front that it is written for and works only with Lion or better.

Having said all that, it should be noted that even the "Premium" version does not do every thing that say Onyx does for free. In consideration of that, anything charged for more than $5 is basically on the wrong side of the Laffer curve (i.e. what I am saying is the Developer will maximize revenues on the program if he does no exceed beyond the apex of the curve which I think is about $5). As a practical matter, if the developer can get this thing to do more and better, THEN charge more. Just say'n.

This app is not free. There are dozens of free alternatives with more features.

One star because the developer is not correct about the price setting.

I'm not so sure that this application be still free, since it is the second time that I have to paid to use a feature (this time: duplicate file finder).

Doesn't open on Mac 10.6.7
Downloaded two times and nothing happens except crash reports.