I am interested in purchasing a SpyderCHECKR / Spyder Checkr Photo / SpyderCHECKR 24 to calibrate my cameras, but I don’t use neither Lightroom nor Photoshop. I use different RAW importing software. Is there any way to use SpyderCheckr Calibrations?
That will depend on your RAW import software.
If it accepts standard format Sidecar files, and utilizes the HSL adjustments in those files, then yes, you can apply SpyderCheckr Calibrations in your software.
You’ll need to use your copy of Photoshop (actually the copy of ACR that it contains) to generate Sidecar files for use with your RAW importing software.