ApexDeco

ApexDeco is an open-source dive planning calculator that runs entirely in your web browser. No server, no installation, no telemetry.

No server, no installation, no telemetry. It generates detailed ascent schedules for trimix, nitrox, and air dives on open-circuit or closed-circuit rebreathers, using the two most widely trusted decompression models in technical diving: Bühlmann ZH-L16C with Gradient Factors and VPM-B (plus VPM-A, VPM-B/E, and VPM-B/GFS variants).

This application is an offline mathematical calculator. It does not collect, measure, or monitor any user data. It does not connect to sensors or wearable devices. All calculations are based on user-entered dive parameters.