The ATO app is free and particularly helpful if you’re a sole trader who has less complex record-keeping requirements. 

Use the ATO app to: 

• record your business income 
• record and manage car trips, expenses, and other deductions on-the-go using the myDeductions tool in the app 
• upload financial year deductions into the myDeductions tool so
  • the ATO can use the information to pre-fill your tax return or your tax agent's standard business reporting-enabled software (SBR-enabled)
  • you can email it to a tax professional.

The ATO doesn’t track personal information entered in the app. 

You can also use the ABN Lookup tool in the app to check Australian business numbers (ABNs), to ensure the people you do business with are registered to operate.