# Decompression Engine

> Decompression Engine (iPhone/iPad app by Andrew Turner.)

- Source: https://appshunter.io/ios/app/decompression-engine/id6807919107 (this page in markdown: same URL + `.md`)
- Developer: [Andrew Turner](https://appshunter.io/developer/6807493882)
- Category: Sports
- Price: Free
- Age rating: 4+
- Requires: iOS 26.5 · 1 MB
- Languages: American English
- Released: 2026-09-23
- Data updated: 2026-10-13

## What is Decompression Engine?

Decompression Engine is a fast, fully offline decompression planner for technical divers.

It runs the Bühlmann ZHL-16C and VPM-B algorithms for open-circuit and closed-circuit (CCR) diving, with trimix, gas switching, multi-level and repetitive dives, gradient factors, gas planning, and CNS/OTU tracking.

Three planning modes:
- Recreational — no-decompression limits on air and nitrox
- Technical — full decompression planning, OC and CCR, trimix and gas switches
- Experimental — an unvalidated folded RGBM model, for cross-checking only

Built-in safety checks flag ppO2, gas density, narcosis, isobaric counterdiffusion, out-of-range settings and aggressive conservatism, and every plan can be copied, shared or exported as text.

Works entirely offline — no account, no data collection, no network required.

IMPORTANT: This is a planning aid, not a dive computer. Decompression models are approximations and cannot eliminate the risk of decompression sickness. Every plan must be independently verified against your own dive computer, and this app is not a substitute for proper training and certification. You dive at your own risk.

## Is Decompression Engine safe?

Not enough ratings yet to assess Decompression Engine.

## Is Decompression Engine legit?

Decompression Engine has limited verification signals. The AppsHunter Legitimacy Score for Decompression Engine is 58 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 1 release)

### 1.0 — 2026-09-23

No release notes.

## Apps similar to Decompression Engine

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Time to Surface – Deco Planner](https://appshunter.io/ios/app/time-to-surface-deco-planner/id6803187271) | 5.0 (1) | Free | Sports |
| [Diveplan - plan your dive](https://appshunter.io/ios/app/diveplan-plan-your-dive/id6451319559) | — | $0.99 | Sports |
| [Easy Deco](https://appshunter.io/ios/app/easy-deco/id1561538676) | 3.0 (2) | Free | Sports |

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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 2026-10-13.*