Watch-faces here are not WFZ type but APK (application) for Huami Amazfit Stratos (Pace 2) watches.
The APK is an Android application which you can install and has almost no limitations.

Which version to choose?

Choose PACE version if:
- you have an Amazfit Pace Intl. / English model with stock firmware version 1.3.6d, 1.3.7, 1.3.8 (or below them)
- you have an Amazfit Pace Chinese model with stock firmware version below 1.5.0
- you have an Amazfit Pace with Pacefied

Choose STRATOS version if
- you have a Stratos (obviously)
- you have an Amazfit Pace Chinese model with stock firmware version over 1.5.0
- you have an Amazfit Pace with any custom Rom that uses WOS2.0

How to install:

To install APK package to your Stratos you will need ONE of the following tools:
- APK Installer : (Windows)
- Huami AMAZFIT Tool : (Windows)
- Android Commander : (Windows)
- SDK Platform (command line) Tools : (Windows, Mac, Linux)

If you have ADB (SDK Platform Tools) installed, you can use: "adb install <packagename>" command
Example: adb install MZI_Digital_Essentials_v0.5.apk

How to uninstall:

To uninstall APK package from your Stratos you will need ONE of the following tools:
- APK Installer : (Windows)
- Huami AMAZFIT Tool : (Windows)
- Android Commander : (Windows)
- SDK Platform (command line) Tools : (Windows, Mac, Linux)
- … and at least you have to know package name …

If you have ADB (SDK Platform Tools) installed, you can use command: "adb install <packagename>"

Example: adb uninstall com.marekzima.DigitalEssentials
Package names can be found on each watch-face description!

How to upgrade:

Unfortunately, the APK is not able to upgrade directly, you have to:
- Uninstall APK first (take a look on "How to uninstall")
- And then install it again (take a look on "How to install")

Some troubleshooting:

First of all I would recommend not to install too many APKs on one watches.
Just choose couple of them (I'd recommend max.5) you really use and install just them.
Uninstall all others (not used) APKs!

Here are some ideas to help you if you notice unusual behaviour after installing watch-faces:

My watch goes black after entering sleep mode
Mostly happens, when you are using PACE version instead of STRATOS version. Please uninstall and reinstall the correct APK.

My watch constantly selects the previous watch face after entering sleep mode
Sometimes it happens after first APK installation or if you have more APKs and you are trying (selecting) them.
Or, if APK has many settings and you try them.
Simply restart (Reboot) your watches it will start to work as it should.