I have used Invoice2go for about six years now, use it on my Mobile & Tablet(Android App), have it on my PC(Web based).
Costs about $660 p/a
Very simple, does GST, BAS.
Not set up for employees, but you can set it up for partners.
Take photos of receipts, screen shots of invoices when entering exspenses.
Easy to search for past expenses, clients, jobs.
I find it awesome, it's my mobile office.
What I really like about it is,
I know my costs of materials, my time, I can email/text the invoice as I finish the job, simple, quick, terms are 14 days, I'm paid that little bit sooner.
You don't use magic to disappear, ya use a 4x4 & Swag.