"A tool to help you tune your guitar from any note."
If what you need is to tune your guitar, it isn't necessary to download a complex and heavy program with functions you won't use. What you need is a basic tool like Pitch Perfect, which hardly consumes system resources, and which offers you a highly adjustable guitar tuning.
Pitch Perfect instantly detects the note you are playing. This means you aren't reliant on standard notes, as happens in other programs, where the guitar has to adjust to the tone emitted by the program. With Pitch Perfect you can tune your guitar to the tune you want.
It is simple to use, and its quality makes it very useful for any guitarist, professional or not, as its graphic interface, although not a luxury, is more than efficient.