The first app is just computing some of the german holidays after a year is passed as a parameter.

curl -s https://holiday-sib76bry.fermyon.app/?year=2023 | jq

Result

{
  "ascension_day": "2023-05-18",
  "ash_wednesday": "2023-02-22",
  "easter_monday": "2023-04-10",
  "easter_sunday": "2023-04-09",
  "epiphany": "2023-01-06",
  "good_friday": "2023-04-07",
  "mardi_gras": "2023-02-21",
  "new_years_day": "2023-01-01",
  "womens_day": "2023-03-08"
}

The second app is generating artifical stock prices (random walk).

curl -s https://randomwalk-1zspqnlv.fermyon.app/single | jq

Result

{
  "prices": [
    {
      "close": 100.37283603345581,
      "date": "2020-01-01",
      "high": 104.84308095456079,
      "low": 97.06905725709731,
      "open": 100.43651755897518
    },
    {
      "close": 100.51549544795425,
      "date": "2020-01-02",
      "high": 103.68456057405697,
      "low": 98.86336192255375,
      "open": 101.10124547390531
    },
    {
      "close": 100.60882537358667,
      "date": "2020-01-03",
      "high": 100.9875354515713,
      "low": 98.61937844007123,
      "open": 100.6353128436274
    },
  ]
}