Apps like RT ToolBox

Here are some great alternatives to RT ToolBox by Łukasz Sieczkowski :
Gamma CalCulator
Gamma CalCulator
★3.4
Gamma Calculator Pro
Gamma Calculator Pro
★4.3
Chemistry Toolbox - Full
Chemistry Toolbox - Full
★4.8
Non-Destructive Testing (NDT)
Non-Destructive Testing (NDT)
★4.2
Exposure Calculator
Exposure Calculator
★4.5
Exposure Calculator
Exposure Calculator
★3.8
Photo Tools
Photo Tools
★3.5
ND Filter Calc (DSLR)
ND Filter Calc (DSLR)
★4.6
ND Filter Expert
ND Filter Expert
★3.9
Film Photography Viewfinder
Film Photography Viewfinder
★4.3
Photography Calculator Tools
Photography Calculator Tools
★4.3
Exposure Assistant
Exposure Assistant
★4.8
Radioactive Decay Calculator
Radioactive Decay Calculator
★3.6
NIOSH Mobile Pocket Guide
NIOSH Mobile Pocket Guide
★4.6
Radiation Detector -Detect EMF
Radiation Detector -Detect EMF
★4.3
ND Calculator
ND Calculator
★3.4