diff --git a/apps/app_binom.lua b/apps/app_binom.lua
new file mode 100644
index 0000000..39fd12f
--- /dev/null
+++ b/apps/app_binom.lua
@@ -0,0 +1,97 @@
+local apps       = require 'apps.apps'
+local ask        = require('dialog.input').display_sync
+local choice     = require('dialog.choice').display_sync
+
+local function run_find_n(stack)
+   local p = "0.50"
+   local op = ">="
+   local limit = "1"
+   local low = "0"
+   local high = "100"
+   local r_op = ">="
+   local r = "0.50"
+
+   while true do
+      local action = choice({
+         title = 'Binom - Find n - ' .. string.format('P(X%s%s)%s%s', op, limit, r_op, r),
+         items = {
+            {align = -1, title = 'p = ' .. p, result = 'p'},
+            {align = -1, title = 'X', result = 'x'},
+            {align = -1, title = op, result = 'o'},
+            {align = -1, title = limit, result = 'l'},
+            {align = -1, title = r_op, result = 'r_op'},
+            {align = -1, title = r, result = 'r'},
+            {align = -1, title = 'n low = ' .. low, result = 'low'},
+            {align = -1, title = 'n high = ' .. high, result = 'high'},
+            {align =  0, title = 'Find... ', result = 'e'},
+         }
+      })
+      if action == 'p' then
+         p = ask {title = 'p', text = p} or p
+      elseif action == 'l' or action == 'x' then
+         limit = ask {title = 'Limit', text = limit} or limit
+      elseif action == 'o' then
+         op = choice {
+            title = "Operator",
+            items = {
+               { title = "=",  result = "=" },
+               { title = ">=", result = ">=" },
+               { title = "<=", result = "<=" },
+            }
+         } or op
+      elseif action == 'r_op' then
+         r_op = choice {
+            title = "Operator",
+            items = {
+               { title = "=",  result = "=" },
+               { title = ">", result = ">" },
+               { title = ">=", result = ">=" },
+               { title = "<", result = "<" },
+               { title = "<=", result = "<=" },
+            }
+         } or r_op
+      elseif action == 'r' then
+         r = ask {title = 'r', text = r} or r
+      elseif action == 'low' then
+         low = ask {title = 'Lower bound (n)', text = low} or low
+      elseif action == 'high' then
+         high = ask {title = 'Upper bound (n)', text = high} or high
+      elseif action == 'e' then
+         break
+      else
+         return
+      end
+   end
+
+   local function eval(n)
+      local fn
+      if op == '=' then
+         fn = string.format('binomPdf(%s,%s,%s)', n, p, limit)
+      elseif op == '<=' then
+         fn = string.format('binomCdf(%s,%s,%s,%s)', n, p, 0, limit)
+      elseif op == '>=' then
+         fn = string.format('binomCdf(%s,%s,%s,%s)', n, p, limit, n)
+      end
+      return math.evalStr(fn .. r_op .. r)
+   end
+
+   low = tonumber(low) or 0
+   high = tonumber(high) or 100
+   for n = low, high do
+      local res = eval(n)
+      if res == 'true' then
+         choice{
+            title = "Results",
+            items = {
+               { title = "n = " .. tostring(n - 2) .. "; " .. eval(n - 2) },
+               { title = "n = " .. tostring(n - 1) .. "; " .. eval(n - 1) },
+               { title = "n = " .. tostring(n + 0) .. "; " .. res },
+               { title = "n = " .. tostring(n + 1) .. "; " .. eval(n + 1) },
+               { title = "n = " .. tostring(n + 2) .. "; " .. eval(n + 2) },
+            }
+         }
+      end
+   end
+end
+
+apps.add('binom - find n', 'Binom - Find n', run_find_n)
diff --git a/apps/init.lua b/apps/init.lua
index e1626e5..1d455a3 100644
--- a/apps/init.lua
+++ b/apps/init.lua
@@ -1,8 +1,9 @@
 require 'apps.apps'
+--require 'apps.app_formulas'
 require 'apps.app_trassierung'
 require 'apps.app_punktsteigung'
 require 'apps.app_triangle'
 require 'apps.app_constants'
-require 'apps.app_analyze_fn'
-
+--require 'apps.app_analyze_fn'
 require 'apps.find_plane'
+require 'apps.app_binom'