The Hey+ SmartBand isn't produced by Xiaomi, but by Ryeex !
So, the Hey+ SmartBand works with Hey+ App, and not with Mi Fit like the Mi Band 3.

★ Officially, the Hey+ App is only available in Chinese.

★ Unofficially, the Hey+ App is being translated in five languages (Chinese excluded) :
⤳ French - Fully translated by @MagicalUnicorn.
⤳ English - Fully translated by @MagicalUnicorn.
⤳ Greek - By @MagicalUnicorn for apprixomative translations, and @geozn8 for fully translations.
⤳ Hungarian - Fully translated by @Sekypapa, based on English translations.
⤳ Italian - Fully translated by @Logoso, based on English translations.
⤳ Spanish - By @MagicalUnicorn for apprixomative translations, and @tute123456 for fully translations until Hey+ 1.0.8.1, @Mooscaar | @YonaPN since Hey Plus 1.0.9.2.


⤳ May 18 2019 :
★ Hey Plus Application 1.1.8.2!
★ New English Custom Firmware 1.13.59 (You must flash files 0 and 1 contained in the .zip) !
★ Firmware 1.13.59 - BUG : Alipay menu title not displayed.

⤳ Apr 22 2019 :
★ Hey Plus Application 1.1.7.1!
★ New Custom buttons Resources !
★ New English Custom Firmware 1.12.74 !

Photos has disappeared in thread attachments, they are reuploaded .

Thanks at all for your posts !

Like @geozn8 said, now we wait to have the Hey+ in our hands to do more.

Also, here's some information about the Hey+ :

Battery - 18 days :
-> Show 50 notifications per day.
-> 3 Heart measures per day.
-> Show 2 calls per day.
-> One ring per day (vibrate 5 seconds).
-> 1 hour activity per week.
-> Synchronize data one time per day.
-> 2 minutes per day for other operations.

10 - 12 days with you use much the Hey+ (21 hours when you have 8%).

Time to charge : 2 hours.

The Hey+ International version (include the release of the Official English Application) will be released normally in two/three months.

If you have any question about the Hey+ I can try to answer it, I don't know all but I got lot of informations .