welcome aboard @ChefChrisYoung
You've said elsewhere that each timer could take at least 8 probes, presumably we can name or colour code each probe, but will the app, when's it's finished be a data logger and be able display each probe's temp concurrently rather than skip through them like some of the bbq controllers do? (e.g. whilst using the app on a larger iPad/tablet screen).
And can you speak to how the probe is powered, somebody asked about battery, if it's not commercially sensitive how do you power a small wifi probe for 24hrs: any nasties in the battery that could seep out?