Where GitHub Desktop fits
Use it if reviewing changes visually is more comfortable than beginning with Git commands.
Check before you choose
Check the diff before committing and confirm the target branch before publishing changes.
Find the right edition
Start with the destination for your device or the publisher's website. Use the current requirements and terms there to confirm the edition you need.
Compare the workflow
Start with the tools your project requires. An editor does not replace a language runtime, and a graphical Git client does not remove the need to understand branches and published changes.