Heath Data Size in iCloud compared to on iPhone

[hogwarts]

Just curious what figures people are seeing for how much space their Health data is taking up on their iPhone compared to on iCloud.

If I look at my iPhone Storage it reports Health as taking up 4.13 GB

However, with Health enabled in iCloud if I look at my iCloud storage usage it is only using 929.5 MB

I have had an  Watch since launch and my health data is very important to me. I'm concerned if ever I had to restore my iPhone that I am going to lose a lot of data because surely the size of my health data in iCloud should be the same as it is on my iPhone?

Or have I misunderstood how this all works?

If anyone can shed any light it would be appreciated!

 

[wHD]

iCloud data is compressed

 

[mavis]

I went through hell with my iCloud health data about a month ago - it's a long and boring story, but I learned an important lesson: make absolutely SURE you make an encrypted local iPhone backup from time to time. As long as you have that, you'll always be able to wipe iCloud's health data and restore the local backup to your phone (and iCloud, in turn). Because I had that backup, I only lost a week's worth of data (waiting for Apple's engineers to get around to contacting me) rather than 5+ years' worth of data. 😉

 

[hogwarts]

iCloud data is compressed

That makes sense, thank you!

 

[hogwarts]

I went through hell with my iCloud health data about a month ago - it's a long and boring story, but I learned an important lesson: make absolutely SURE you make an encrypted local iPhone backup from time to time. As long as you have that, you'll always be able to wipe iCloud's health data and restore the local backup to your phone (and iCloud, in turn). Because I had that backup, I only lost a week's worth of data (waiting for Apple's engineers to get around to contacting me) rather than 5+ years' worth of data. 😉

Thats the scenario I'm trying to avoid, thank you for passing it on. I do tend to do full encrypted backups before IOS updates but might need to increase that frequency a bit