# Gas Manager — Scuba Diving Gas Blending Tool > Scuba diving gas blending and calculation tool for iPhone. (iPhone/iPad app by Ryan Booker.) - Source: https://appshunter.io/ios/app/gas-manager/id500438406 (this page in markdown: same URL + `.md`) - Developer: [Ryan Booker](https://appshunter.io/developer/1200695611) - Category: Sports, Utilities - Price: $2.99 with in-app purchases - Rating: 4.00/5 from 2 App Store ratings · 6 written reviews indexed - Age rating: 4+ - Requires: iOS 18.0 · 12 MB - Languages: Canadian French, German (Germany), American English, Latin American Spanish, Italian - Released: 2012-02-11 - Data updated: 2026-09-06 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/gas-manager/id500438406/reviews.md ## What is Gas Manager? Scuba gas management for iPhone. Gas Manager includes various tools for planning and blending diving gases, including nitrox and trimix partial pressure blending, top off and best mix calculators, as well as MOD, END, EAD, and EDD calculation. WARNING: Safe gas blending requires proper training and equipment. Always personally analyse and label your fills before diving. ## Key features - Nitrox and trimix partial pressure blending - Top off calculator - Best mix calculator - MOD calculation - END, EAD, and EDD calculation ## Pricing and in-app purchases Base price: $2.99. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Leave an Espresso Sized Tip | $2.99 | one-time | | Tip a Bag of Beans | $8.99 | one-time | | Tip a Big Bag of Beans | $29.99 | one-time | ## Chart rankings - #196 in Top Paid · Sports (US App Store) ## Recent user reviews (6 of 6) All indexed reviews: https://appshunter.io/ios/app/gas-manager/id500438406/reviews.md ### 5/5 — Easy and useful! *2018-01-03* Very easy to use app - works well along side tables and proper training - will be my daily go to - thanks for a great app ### 5/5 — Top *2013-08-25* Selbsterklärend, alles was man braucht, einfache Bedienung, Ergebnisse stimmen. Für Nitrox, Heliox &Trimix geeignet! Top App!! ### 3/5 — Good pocket tool for the gas blender *2013-02-13* The Gas Manager is a good pocket tool. I only miss the van der Waal equation. But with a little bit experience, the fudge-factor works good as well. The EAD function does not support Trimix! ### 1/5 — Not very good. *2012-12-14* This app isn't very good. Feel like I wasted $2.99. Needs an overhaul. Confusing to use, only gives best mix for trimix, NOT nitrox. Wish I could have my money back. ### 5/5 — Brilliant *2012-05-28, version 1.0.3* Great app. Just what I've been looking for ### 5/5 — Great *2012-02-12, version 1.0.0* Just what I have been looking for. Goo to double check keep up the great work . A++++ ## Frequently asked questions about Gas Manager ### What is Gas Manager? Gas Manager is a scuba diving tool for iPhone that helps you plan and blend diving gases. It includes calculators for various gas mixtures and dive parameters. ### What types of gas blending can Gas Manager help with? Gas Manager supports planning and blending of nitrox and trimix gases using partial pressure calculations. ### Does Gas Manager offer dive safety calculations? Yes, Gas Manager includes calculators for MOD (Maximum Operating Depth), END (Equivalent Narcotic Depth), EAD (Equivalent Air Depth), and EDD (Equivalent Depth of Decompression). ### What devices is Gas Manager compatible with? Gas Manager is designed for iPhone and is compatible with all supported iPhone models. ### How much does Gas Manager cost? Gas Manager is a paid application priced at $2.99. ### Is Gas Manager suitable for beginners? The app's description includes a warning that safe gas blending requires proper training and equipment. Users should always analyze and label their fills before diving. ### How often is Gas Manager updated? The latest version, 3.1.0, was last updated on September 12, 2025, indicating active development and support. ### Does Gas Manager have ads? No, Gas Manager does not contain advertisements. ## Version history (last 5 releases) ### 3.3.0 — 2026-05-17 - Add Home Screen Quick Actions for primary and most recently used tools - Add Operating Limits App Shortcut/Intent ### 3.2.0 — 2026-05-09 Compatibility updates, bug fixes, and improvements. ### 3.1.0 — 2025-09-12 - Updated for Liquid Glass ### 3.0.1 — 2025-02-13 - Minor localisation fixes. ### 3.0.0 — 2025-02-11 Gas Manager 3 is a complete rewrite in SwiftUI featuring: - Individual Partial Pressure and Continuous Blending tools - Improved Partial Pressure and Continuous Blending calculations - Operating Limits tool - Individual MOD, END, EAD, and EDD tools - Shortcuts and Siri integration - Accessibility improvements - Spanish, French, German, and Italian localisations (Please let me know if you have any corrections, particularly for domain specific and technical terminology.) - Light, Dark, and Tinted icon styles ## Apps similar to Gas Manager | App | Rating | Price | Category | | --- | --- | --- | --- | | [XStats](https://appshunter.io/ios/app/xstats/id6463858798) | — | Free | Sports | | [Trimix MOD](https://appshunter.io/ios/app/trimix-mod/id1595424283) | — | Free | Sports | | [Race Timer for Sports Timing](https://appshunter.io/ios/app/race-timer-for-sports-timing/id6741071842) | 1.0 (1) | Free | Sports | | [MapRun](https://appshunter.io/ios/app/maprun/id1634949963) | 3.7 (3) | Free | Sports | | [Deer Calls for Whitetail App](https://appshunter.io/ios/app/deer-calls-for-whitetail-app/id6450379478) | 4.7 (393) | Free | Sports | | [Cave DB](https://appshunter.io/ios/app/cave-db/id6478911599) | 1.0 (1) | Free | Sports | ## Related topics [gas manager](https://appshunter.io/ios/topics/gas-manager) · [scuba gas manager](https://appshunter.io/ios/topics/scuba-gas-manager) · [trimixblending](https://appshunter.io/ios/topics/trimixblending) --- *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 2026-09-06.*