The app price is 5,000 rupiah cheaper than buying tickets on the spot. We went there on a weekday, and it was quite busy, so we were still able to use the rides without any worries. Some rides were closed, which was a shame. I just found out that you're not allowed to bring any food or drinks here, so you have to buy them on the spot. There was also a food vendor who set prices above average, probably because they just opened and no one was buying yet, hmm. Hopefully, things will improve in the future.