Probably not? When I use my headphones with my laptop, 10% system volume and 100% app volume is about comparable to 80% volume (ish) on my iPhone 6S.
Evidently there isn't much standardization between devices. Personally I don't find it that annoying - devices remember what volume I last set them to.
Evidently there isn't much standardization between devices. Personally I don't find it that annoying - devices remember what volume I last set them to.