diff --git a/Nitrogen-CIT/app.R b/Nitrogen-CIT/app.R
new file mode 100644
index 0000000..26ef0e7
--- /dev/null
+++ b/Nitrogen-CIT/app.R
@@ -0,0 +1,94 @@
+library(shiny)
+library(readxl)
+library(DT)
+library(dplyr)
+
+# Define UI for application
+ui <- fluidPage(
+  navbarPage("Nitrogen CIT",
+             tabPanel("Listado",
+                      sidebarPanel(
+                        fileInput(inputId = "file", label = "Fichero", multiple = F)
+                      ),
+                      
+                      mainPanel(
+                        DTOutput("DT")
+                      )
+             ),
+             tabPanel("Caja",
+                      sidebarPanel(
+                        selectInput(inputId = "test", "", choices = ""),
+                        uiOutput(outputId = "caja_out")
+                      ),
+                      
+                      mainPanel(
+                        tableOutput("DT_caja")
+                      )
+             )
+  )
+)
+
+# Define server logic required
+server <- function(input, output) {
+  dades<-reactiveValues()
+  dades$taula<-NULL
+  
+  ## Listado ----
+  
+  observe({
+    req(input$file)
+    df.list<-lapply(excel_sheets(input$file$datapath), read_xlsx, path=input$file$datapath, range="B1:K31", col_type="text")
+    names(df.list)<-excel_sheets(input$file$datapath)
+    name.row<-seq(from=1, to=nrow(df.list[[1]]), by=3)
+    date.row<-seq(from=2, to=nrow(df.list[[1]]), by=3)
+    desc.row<-seq(from=3, to=nrow(df.list[[1]]), by=3)
+    for (i in 1:length(df.list)){
+      df.list[[i]]<-data.frame(
+        Tanque=gsub("-[0-9]* #[0-9]*$","",names(df.list)[i]),
+        Rack=gsub("^[A-Z]-| #[0-9]*$","",names(df.list)[i]),
+        Caja=names(df.list)[i],
+        Fila=rep(LETTERS[1:10], 10),
+        Columna=factor(as.character(rep(1:10, each=10)),levels=as.character(1:10)),
+        Nombre=unlist(df.list[[i]][name.row,]),
+        Fecha=unlist(df.list[[i]][date.row,]),
+        Descripción=unlist(df.list[[i]][desc.row,])
+      )
+    }
+    df<-do.call(rbind, df.list)
+    df[grepl("^[0-9]*$", df$Fecha),"Fecha"]<-as.character(as.Date(as.numeric(df[grepl("^[0-9]*$", df$Fecha),"Fecha"]), origin = "1899-12-30"))
+    for (i in c("Tanque", "Rack","Caja","Fila")){
+      df[,i]<-factor(df[,i])
+    }
+    dades$taula<-df
+  })
+  
+  output$DT <- renderDT({
+    req(dades$taula)
+    datatable(dades$taula, filter = "top", rownames = F, escape = F, extensions='Buttons',options = list(autoWidth=TRUE, dom = 'Bfrtip',buttons=I('colvis'), lengthMenu=c(10,20,50), pageLength=30))
+  })
+
+  ## Caja ----
+  
+  output$caja_out<-renderUI({
+    observeEvent(dades$taula, {})
+    selectInput(inputId = "caja", "Caja", choices = unique(dades$taula$Caja))
+  })
+
+  output$DT_caja <- renderTable({
+    req(dades$taula)
+    caja_l<-dades$taula[dades$taula$Caja == input$caja,]
+    caja_l$Nombre[is.na(caja_l$Nombre)]<-""
+    caja_l$Fecha[is.na(caja_l$Fecha)]<-""
+    caja_l$Descripción[is.na(caja_l$Descripción)]<-""
+    caja<-as.data.frame(matrix(data= paste(caja_l$Nombre, caja_l$Fecha, caja_l$Descripción, sep="<br>"),
+                                 ncol = 10, nrow=10))
+    colnames(caja)<-as.character(1:10)
+    rownames(caja)<-LETTERS[1:10]
+    
+    caja
+  }, rownames = TRUE, sanitize.text.function=identity, bordered =  TRUE)
+    
+}
+
+# Run the application 
+shinyApp(ui = ui, server = server)