WHat is the reason you dont use GDD. I dont think there is any discrepancy. Doing calculations My high 100 low 71.6 so my average temp (which is what GDD is based on) was 85.8F which equals and increase of 29.9 GDD
Your daily average was alot higher than mine you started your day 10 degrees hotter than me. So your average is at 93F (High of 104 low of 82) So your GDD on feringeight scale is 33.9.
But to each his own. I am not gonna say your system which has been working for you is wrong.
I'm certainly not saying they are wrong about the GDD model or even the reapplication timing, and I'm not saying I'm right. My system and dosing works for me for 3 week reapplication instead of two. My Palisades zoysia does come out of regulation, but my other grasses don't, including El Toro zoysia, so I assume that different bermuda cultivars would also behave similarly in that they would respond differently to rates and timing.
I know that Irias noted that Celebration doesn't like Primo apps over .25oz/K, where I'm using .4oz/K on even my zoysia. I also think @viva_oldtrafford even mentioned the eye test as being the most sound way to know when to reapply.
I would like to see this work and may give it another shot. I do wish that this was an app I could use on my phone. If that is possible, then it may win me over.