I am flying SIN-DPS in a week and only plan on having the app downloaded but nothing uploaded. I didn't even put in my real passport number. Based on numerous pieces of info from tripadvisor, the most that is checked is if you have the app downloaded, if even that. I also plan on using Bali Fast track when I arrive...I am arriving right in the middle of a bunch of flights, so hoping it helps. I looked at 3 different places to book fast track and only one of them would go through (well, technically I still need to pay via paypal). The other two that said they would take credit card never worked, always declining. It's really annoying that Chase and Citi don't have the OTP verification that is required by some of these online sites...makes it hard to book some things online.