/https%3A//blueprint-api-production.s3.amazonaws.com/uploads/card/image/612799/b544e2c7-3c72-42b0-89c3-15e358291ac0.jpeg)
Just to let you know, if you buy something featured here, Mashable might earn an affiliate commission.
Ask any freelancer what the most tedious part of their job is, and they’ll likely say invoicing. Tracking who has paid them and who hasn’t, staying on...
