NovyDeco
Two decompression models
Bühlmann ZHL-16C with gradient factors (GF low / GF high) or VPM-B with a conservatism level. Switch models and compare plans in one tap.
Dive planning app for iPhone and Android
Plan your dives, on open circuit and on rebreather
NovyDeco computes your decompression with Bühlmann ZHL-16C or VPM-B, manages your gases and bail-outs, replays the plan like a dive computer and keeps your logbook. Everything runs on your phone, no connection needed.
- 10-day free trial
- Works offline
- Android
- iPhone
- English · Français
Everything you need to prepare a decompression dive
A planner built for technical diving: two decompression models, full gas management, simulation and a logbook, in a single app.
Open circuit and rebreather
Diluent, ppO₂ setpoint, bail-out gases. For every CCR dive, NovyDeco computes the rebreather plan, the bail-out plan and their “max” variants.
Gas management
Air, nitrox, trimix, multiple cylinders. Consumption, remaining pressure, reserve, and an alert as soon as a cylinder drops below its reserve.
Full runtime
Depth, duration, run time, gas, ppO₂, END, CNS and OTU for every segment. Export the plan as PDF to carry it or share it.
Graphical profile
Depth / time curve with per-compartment ceilings, cylinder pressures and gas switches. Touch the profile to read the tissue state at that moment.
Dive computer simulator
Replay the plan minute by minute: ceiling, TTS, ppO₂, tissues, just like on a computer screen, so you know what to expect underwater.
Comparison and GF variants
Several dives side by side, and automatic generation of gradient-factor variants to see their effect on decompression time.
Logbook
Trips, dives, buddies, equipment. Bluetooth import from your dive computer: Shearwater Perdix and Petrel natively, other models through libdivecomputer.
Also included
- Altitude diving
- Fresh or salt water
- Light and dark theme
- Custom colours
- Import / export of plans
- Gas usable as diluent or bail-out
- Minimum surface ppO₂ threshold
- Several dives per session
How it works
Set up the dive
Depth, time, gases, open-circuit or rebreather mode. Adjust gradient factors, ppO₂, altitude and simulation step.
Read the plan
Stops, runtime, consumption per cylinder and alerts. The standard plan and the “max” plan are computed together.
Simulate, compare, export
Replay the plan in the virtual computer, compare variants, export to PDF and find your dives again in the logbook.
Screenshots
Scroll through, tap a screenshot to enlarge it.
Pricing
10-day free trial
Every feature, no restriction, from the moment you install. No account to create.
Then a yearly subscription
At the price shown in your store, cancellable at any time: from Google Play › Payments & subscriptions on Android, from Settings › your name › Subscriptions on iPhone.
Payment and billing are handled by Google Play or the App Store. NovyDeco never collects payment details.
Frequently asked questions
Bühlmann or VPM-B: which one should I pick?
Bühlmann ZHL-16C is the most widespread compartment model; gradient factors tune its safety margin. VPM-B models micro-bubble growth and tends to call for deeper stops. NovyDeco offers both, with separate settings, so you can compare and follow the practice you were trained in.
Does the app work offline?
Yes. All computations run on the phone, and both the planner and the logbook work without a network. The Internet is only used to look up a dive site's coordinates (OpenStreetMap, plus the Shom for wrecks in French waters), at your request, and for the subscription.
Which dive computers can I import from?
Shearwater Perdix and Petrel connect over Bluetooth with a choice of which dives to import. Other models go through the libdivecomputer library, which supports most computers that communicate over Bluetooth.
Does my Android subscription work on iPhone?
No. There is no NovyDeco account: each store handles its own subscription, Google Play on Android, the App Store on iPhone. To switch, export your plans and logbook to a file, then import them on the new phone.
Can I trust the computed plan?
NovyDeco is a planning tool. It does not replace your training, your dive computer or your judgement. Check every plan, adapt it to your certifications and always dive with a backup plan.
Where is my data stored?
On your device. There is no account and no NovyDeco server. Your plans and logbook stay inside the app, and you can export them to a file.
A planning tool, not a guarantee
Decompression diving carries risks. No decompression model removes the risk of an accident. Use NovyDeco alongside your training, your dive computer and your agency's procedures. The publisher accepts no liability in case of accident.
Ready to plan your next dive?
Install NovyDeco and enjoy a 10-day free trial with every feature.