Diver's Toolkit
Precision tools for the modern scuba diver — built by divers, for divers.
LSP D-Planner+
Unified open-circuit and rebreather decompression planner — Bühlmann ZHL-16C + GF, VPM-B, CCR, pSCR, bailout, Tier 3 engine, offline PWA and Android.
T-Viewer
Companion app for LSP D-Planner+. Open, read, and share dive plan TXT and PDF files exported by LSP D-Planner+ on Android or in the browser — syntax highlighting for deco schedules, gas labels, and warnings.
Get In Water
Pack your dive trip. Customizable master gear template, per-trip checklists, and TXT/PDF export. Install as a PWA or download the Android APK — companion to LSP D-Planner+.
Knowledge Base
Curated videos, reels, and reading for divers — study skills, signals, and gear know-how before your next dive. All links in one place.
3D Dive Gadgets
Custom 3D-printed diving accessories — designed and built for real divers.
- 360 Diving MirrorConvex wrist mirror for all-round underwater vision — monitor buddies, check valves, signal on the surface.
- WoW PlatesWeight on Webbing plates — quick, secure way to add lead to any 2″ harness webbing without de-kitting.
- Long Hose RetainerTriglide-based long hose holder that stays put on your harness, with an extra D-ring for fins or gear.
About Three Cats LSP
Three Cats LSP is an independent home project creating 3D-printed diving gear gadgets for scuba divers, and the developer of LSP D-Planner — a deco schedule app packed with tools for your underwater adventures. Built by people for people who know what matters underwater.
LSP D-Planner+, T-Viewer, and Get In Water are free and open-source. If they help your diving, consider supporting development.
Donate via PayPal