# OVM — decompression planner

> decompression planner (iPhone/iPad app by data-project bv.)

- Source: https://appshunter.io/ios/app/ovm/id6766059875 (this page in markdown: same URL + `.md`)
- Developer: [data-project bv](https://appshunter.io/developer/1896180478)
- Category: Sports
- Price: $7.99
- Age rating: 17+
- Requires: iOS 16.6 · 1 MB
- Languages: American English
- Released: 2026-05-06
- Data updated: 2026-08-14
- User reviews in markdown: https://appshunter.io/ios/app/ovm/id6766059875/reviews.md

## What is OVM?

OVM Diveplanner is an OC/CC (rebreather), mixed gas, multi-level, repetitive dive, decompression planner based on Bühlman ZHL/16C with configurable gradient factors or VPM/B. It tracks CNS and OTU's. Auto-calculates bailout profiles when in CCR mode. Create your dive profile by entering a list of depths of adding waypoints in the visual planner mode. Use predefined gasses or add your own custom mix. 

Also provides several gas mix tools for estimating gas results when topping off your tanks. This will give an estimate if boosting tanks leads to undisiarable results, before mixing.

The app contains a user manual which is also available online at https://www.ovm-planner.com/user-manual.html.

The app is intended for certified who whish to create an estimate of their dive profile and gas usages when executing deep decompression dives, helping in determining the required amount of decompression gas or bail-out gas needed. It can also be used to create an ascent profile to which you can fallback on when the divers computer fails underwater, or use for sanity checking you dive computer during the dive.

The app works standalone and offline. It does not require an account and does not store any data except app settings such as breathing rate and entered dive settings. No external connections, software or hardware is required. No subscribtion of in-app purchases needed or possible.


## Version history (last 4 releases)

### 1.3 — 2026-08-11

Cleaner layout and simpler structure
Added VPM/B as algorithm option
General stability and reliability improvements across planning, CCR workflows, and repetitive-dive handling

### 1.2 — 2026-06-03

Improved planner stability and validation
Bug fix on ccr repetitive dive bailout gas selection
List and visual planner modes integrated in one
Improved warnings display
v/d Waals added to gasmixer calculations

### 1.1 — 2026-05-11

- Tightened off gassing calculation
- Minor layout and interface improvements
- added selectable bailout gradient factors

### 1.0 — 2026-05-06

No release notes.

## Apps similar to OVM

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Abysner](https://appshunter.io/ios/app/abysner/id6636477320) | 5.0 (2) | $2.99 | Sports |
| [Trimix Tools](https://appshunter.io/ios/app/trimix-tools/id289220808) | 5.0 (5) | $6.99 | Sports |
| [DiveHub - Multi Dive Tool](https://appshunter.io/ios/app/divehub-multi-dive-tool/id6756101582) | — | Free | Sports |
| [The JJ CCR Checklist: Diving](https://appshunter.io/ios/app/the-jj-ccr-checklist-diving/id6467408738) | — | $9.99 | Sports |
| [CCR Junk](https://appshunter.io/ios/app/ccr-junk/id6757073023) | — | $8.99 | Sports |
| [nDeco](https://appshunter.io/ios/app/ndeco/id6741527911) | 2.0 (1) | Free | Sports |

## Related topics

[divest](https://appshunter.io/ios/topics/divest)

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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 2026-08-14.*