P L E A S E -- R E A D -- B E F O R E -- Y O U -- B U Y!!!
Use this app for LRV and LCh°. LRV is Light Reflectance Value and LCh° is Lightness, Chroma, and Hue Angle which means you can download The Color Strategist color wheel and determine what hue family a color belongs to.
How It Works:
LRV Guru™ app can be USED ALONE to calculate known LRV value differences.
LRV and LCh° are displayed via the "Compare" option from the menu.
LRV Guru™ app MEASURES Light Reflectance Value (LRV) when integrated with Variable, Inc.'s Color Muse hand-held colorimeter.
The spectral data captured with the Color Muse and the values and/or ratios ascertained using the LRV Guru app are reasonably informative guidelines - "in the ballpark", as they say.
Beyond reasonably informative guidelines would require certified measurements from a color lab.
NOTE: You cannot take a picture of a color with your smartphone or camera and ascertain LRV. A picture of a color is just a captured image, it is NOT A MEASUREMENT! To MEASURE LRV using this app, you must use a Color Muse or NODE+Chroma hand-held colorimeter.
FEATURE: You can adjust the contrast ratio. LRV Guru's default contrast ratio is set at 70% because it is the most commonly applied guideline. A significant bonus feature of the app is that the contrast ratio can be adjusted by tapping "settings" and positioning the slide bar as desired.
LCh° values are now displayed for scanned colors.
Minor bug fixes.
Ratings and Reviews
Crashes On Opening!
I just purchased this app and I can't even open it. It crashes EVERY time, even after restarting my iPhone. PLEASE fix!!!
Developer Response ,
There was an update from Apple during this timeframe and the app had to be revised as a result.
This works perfectly with the Node. So useful and I spent at least an hour going around my house finding the LRV value of random things, the dogs, my wall, my shirt, a mirror of all things, anything I could scan I did totally worth it. This is just an all around great app, I was vary impressed. I definitely recommend this awesome app.
The new version works wonderfully, great job on the app!
Love the LRV Guru app idea, but it is not connecting my iPhone to the Color Muse. I have the latest update and latest operating system upgrade. Is there a fix? Update: Thanks for your response! After fidgeting a bit, I was able to connect to the Color Muse. It's very helpful to be able to take LRV measurements on the spot. Highly recommend!
Developer Response ,
New version 1.3.2 released July 2017 fixed a bug that could cause the app to stall or not connect at all to the Color Muse. Apologies for any inconvenience! ~Lori
With Family Sharing set up, up to six family members can use this app.