This is an f-stop timing calculator to be used in a photographic darkroom.
'Way Beyond Monochrome' by Ralph W. Lambrecht and Chris Woodhouse gives a brilliant introduction into f-stop printing. Some chapters are available for free from waybeyondmonochrome.com
Ratings and Reviews
No documentation or in-app help. Poor user interface. The bottom of the screen is barraged by bright, light-contaminating ads. The only obvious function is the Remove Ads button for $2.99! The screenshot does not show the actual app with ads or the remove ad button.
Can't use free version
The bright, obnoxious ad makes this app absolutely useless.
White Light Contaminated Crap App!!
It must just be a look and see.
BECAUSE YOU CAN'T USE IT IN THE DARKROOM WITH THE FRIKIN WHITE LIGHT AD THAT WON'T GO AWAY.
Doesn't do anything about stopping the phone from changing the screen if a call comes in, which will contaminate the darkroom with light. DUH
This App wasn't thought threw.
With Family Sharing set up, up to six family members can use this app.