The ecigvape one lets you enter drops per ml for each different addition to the recipe. Which is good because I came up with WIDELY different numbers per ml on PG and VG -- broad dropper tip (like the droppers on TFA flavor bottles) 37 drops per ml with PG, 27 drops per ml with VG; with the narrow dropper tips (like those in INW flavor bottles), PG is 55 drops per ML, VG 35 drops per ml.
Seeing this huge disparity between Pg and VG and even the type of dropper tip being used, I've stopped measuring anything in drops; I use my 1ml syringes, so I can measure to .xx, which will have to be close enough; it's the only possible way I've found to preserve proportionate measurements. And before anyone suggests it, I'm not going to buy an expensive scale so I can measure by weight. I have a hard enough time with the measurements I currently deal with, I'm not going to complicate it further by introducing a different scale of measure, and I'm DIYing, partly, to save money, not spend more.
Andria
Yep - I've been using the ecigvape one so far. I like it because you it will let you specify drops per ml for your VG, PG, nic base, and each flavoring. Although, I admit the only reason I've been very worried about that is getting completely accurate percentages <-> drops for number of drops of each ingredient used while taste-testing. Especially with VG being so much higher viscosity - it only takes 23 drops out of the same droppers to drop 1ml into a calibrated 10ml graduated cylinder, 37 for PG. It may end up not being very important in the long run, I've only used the drop testing to develop one recipe so far. Bill mentioned at some point in this thread that the main thing this is for is to establish the ratios / percentages between the flavorings.
Checking on what is the standard closure size for Specialty Bottle's 1oz bottles. Again, your 1oz bottles may need a different cap but I bet they're the same. Will post again here in a sec.