These calculations are a planning aid for trained divers. They are not a substitute for training, dive tables or a dive computer. Always dive within your certification and check every result.
These are formula calculations: they do arithmetic you have chosen to do, with inputs you have supplied. They are not a decompression planner, they do not replace training, and they say so plainly wherever a result could be mistaken for a plan.
Shown once on this device. It stays one tap away: “Not a dive plan” at the foot of every page.