From version Camera NX (Google Camera mod) 5.2.019.188906351 (READ NOTES):

chromloop.com/2018/03/apk-camera-nx-7-4-base-google-camera-5-2-features-bring-back-hdr-nexus2015/

Update 03/24/2018 V7.4
Base on Google Camera 5.2
1. Bring back HDR+ on Nexus 5X/6P.
2. Add Lens Blur mode back.
3. EIS should be back to normal on Pixel 1, as EIS will be disabled with 4K quality.
4. Use Google Photos to view results again on enhanced version.

PS:
1. Portrait mode needs a test on Android 7.1, maybe not work.
2. To view Motion photos, you need Google photos installed and login your account.

ZSL-enhanced version includes Motion photos, Diet-burst, Google photos combination and all ZSL version features, require Android 8.0+,
ZSL version contains ZSL HDR+, hybrid burst, 240 FPS slow-motion, 60FPS video ready, and other OG Pixel features. it is for Nexus 2015 running Android 7.1+, if you don’t use motion photo, you can also use this one.

Bugs:
1. Diet-burst won’t choose the best photo as Smart burst(ZSL-enhanced version).
2. Camera NX need system signature and install as system app to show HDR+ process within Google photos, or you will see a black screen with a loading icon right after taking a HDR+ photo.

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Version:5.2.019.188906351

Uploaded:March 24, 2018 at 8:20PM UTC

File size:29.88 MB

Downloads:103,087

Version:5.1.016.174405463

Uploaded:December 31, 2017 at 8:19PM UTC

File size:36.54 MB

Downloads:196,141

Version:5.1.011.170395186

Uploaded:October 16, 2017 at 10:16PM UTC

File size:36.74 MB

Downloads:65,167