Hey, find my new app below Android version, let me know how you get on or if you need any help. As this version is not paid I'd suggest just importing 3 clients (that's the free limit' and then have a look at generating quotes/invoices (customise these in settings) and look at making a job (standalone or from quote).
https://play.google.com/store/apps/details?id=com.uktradelogbook.app