Ok so i just did my DPD using the app and it was dead simple, took about 3 minutes. Used my android phone to scan my passport photo page and rfid chip, take a selfie (first one failed, but moving in bathroom where there was better light saw second one accepted) and then scanned the printed copy of my international vax cert no problem (the one thing i had printed before i left home).
The longest bit was getting it to recognise my home address, the auto recognition didnt like the 99/99-99 street name format (kept dropping my unit number) so i had to manually enter full addy.
When came to print, i took a screen shot of the summary page, samsung phones smart enough to recognise that page was more than one screen and ensured image scrolled down to get all info.
Screen shot saved and ready for check in on Wednesday, which should b simple as Fiji Airways has a check in desk at the hotel, so i will have my boarding pass before i get to airport and they will delivery my checked bags.