A bit misleading

NOT INTUITIVE - won’t work between my mac and iPad unless I upgrade???? Only on the iPad - useless for transferring files between devices.

. will not sync docs between IPAD and PC. Says it does but will not work.
2. Cannot format text in an Excel file on IPAD
3. Cannot save docs on IPAD that are attached to emails sent from my PC

I have tried 23 times to contact support by all different means - email from home PC account, email from IPAD account and calling.
NO ANSWER after 30 days of trying.
Will never ever by an app from this company again - went ahead and bought NUMBERS from Apple and I am 100% satisfied from the start, will use DOCSTOGO only to read pdfs.
What a waste

Ronshagnasty about Docs To Go Premium, v5.2.6