NDL

Official app for confirming diver certification status and logging no-decompression limits.

iOSfree

NDL is the official mobile app to confirm diver or freediver status online and save electronic certificates offline, with a free logbook and no-decompression limit planner.

iOS

Full match profile

Behind the summary, Matchbox keeps a richer profile of NDL - the signals our matcher actually reads to decide when to surface it. It stays private; claim the listing to see and control it.

Problem & pain-point mapping
Who we surface it to (audience fit)
What it's a strong alternative to
Trust & credibility signals

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