# Deep Frontier Dive Tools — Trimix & CCR deco planning

> Trimix & CCR deco planning (iPhone/iPad app by Christoph Heinrich Fischer.)

- Source: https://appshunter.io/ios/app/deep-frontier-dive-tools/id6787112416 (this page in markdown: same URL + `.md`)
- Developer: [Christoph Heinrich Fischer](https://appshunter.io/developer/6787112418)
- Category: Utilities, Sports
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 2 MB
- Languages: American English
- Released: 2026-07-21
- Data updated: 2026-07-30
- User reviews in markdown: https://appshunter.io/ios/app/deep-frontier-dive-tools/id6787112416/reviews.md

## What is Deep Frontier Dive Tools?

Deep Frontier Dive is a decompression planner for trained technical divers. Plan open-circuit and CCR dives with two validated models, complete gas planning, and the contingencies that matter — on iPhone and iPad, fully offline, in metric units.

TWO DECOMPRESSION MODELS
• Bühlmann ZHL-16C with gradient factors — presets or fully custom GF low/high
• VPM-B and VPM-B/GFS with conservatism levels 0–4
• Cross-validated against published reference schedules

OPEN CIRCUIT AND CCR
• Open-circuit plans with automatic gas switches at sensible depths — ppO2 hard-capped at 1.6, lean deco mixes at 1.4
• CCR plans with bottom and deco setpoints and diluent control
• Full open-circuit bailout schedules from your carried bailout gases — never assumed, always checked, with clear warnings when coverage or volume falls short

GAS PLANNING
• Per-cylinder consumption from your bottom and deco SAC rates
• Reserve strategies including rule of thirds
• Minimum gas / rock bottom for a two-diver problem at depth
• Lost-gas contingencies: every deco gas lost, replanned, and checked against the remaining volumes

DIVE DAYS
• Repetitive dives with surface intervals
• Tissue and bubble state carried from dive to dive
• Cumulative CNS and daily OTU totals

WARNINGS THAT MATTER
ppO2, END, gas density, isobaric counterdiffusion (rule of fifths), CNS and OTU — flagged as caution or danger before you get wet.

GAS TOOLS
MOD, best mix, EAD, END, gas density and equivalent air-density depth, SAC calculator, and partial-pressure blending worksheets.

BUILT FOR THE FIELD
• Altitude diving support
• Three configurable ascent-rate phases: bottom to deco, during deco, deco to surface
• Salt and fresh water
• Saved plans — editable, duplicable, never locked
• Runtime tables with depth, duration, runtime, gas and ppO2 for every level
• Depth-profile chart with stops and gas-switch markers
• Works completely offline. No account, no ads, no tracking.

FREE AND PRO
Open-circuit Bühlmann planning, the gas plan and saved plans are free forever. A single one-time purchase — Deep Frontier Dive Tools Pro — unlocks CCR planning, VPM-B, lost-gas contingencies, dive days and the gas tools. No subscription.

IMPORTANT
This app is a planning tool for trained technical divers. It is not a substitute for formal training, a dive computer, or your own judgement. Decompression planning involves inherent uncertainty: always validate schedules against your training and agency procedures, plan adequate reserves, and dive entirely at your own risk.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Deep Frontier Dive Tools Pro | $12.99 | one-time |



## Version history (last 1 release)

### 1.0 — 2026-07-21

No release notes.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-30.*