Cool illuminometer

For my work I need illuminometer, however they are pretty expensive and when I unfortunately destroyed it and were out of money I haven´t had any other option than purchase this app. Now I have enough money to buy a new illuminometer, but still I prefer use this easy app that cost only 0.99$

ScorpyCZ about Lux Meter - light measurement tool for measuring lumens, foot candles, lx and light temperature