Timecode Calculator is the software to perform basic operations on video timings. You can add, subtract, multiply or divide pieces of video tapes in many formats. It is also possible to convert calculated values between formats without re-entering values. Record of all calculations is stored in the log. You can preview & print the contents of the log or copy it to the clipboard.
Fixed compatibility issues in older Mac OS versions.
Ratings and Reviews
It does what you need.
This does exactly what you need it to do, but it could be a little less expensive for what it is…
Family SharingWith Family Sharing set up, up to six family members can use this app.