I am Industrial Designer and this small app. can be useful for a fast measurement outside of the office. But I tried the update and I had return for the original version (1.0). In the 1.1 version the calipers come crazy and uncontrollable, the priority is for the red lines.
Four and half stars for the 1.0 version and only 2 stars for the 1.1 version due to the strange calipers behavior.
METEORE D. about Caliper