A simple but awesome app. So useful.
Fantastic app with built in timer. Great!!!!!!!
The best ND calculator I have ever used. Simple, accurate, and has all the best features for calculating exposure for long exposure photography work. Keep up the good work!
Does one job well.
I've tried other apps, and this one has the best set of features, and is accurate. Of course you should always test your ND filters for their exact f-stop number, because they may be slightly different from the manufacturer's claim, and so slight differences in exposure settings are not the fault of the app.
It is really useful when the light is tricky and you have had to change your f stop or shutter speed and you don't have (or don't trust) your light meter. Limited times that it is needed, but in those times it has great usefulness. Well supported by the developer.
Persist ND calibration settings.