# SAC Rate Scuba — SAC RMV Gas Runtime

> SAC RMV Gas Runtime (iPhone/iPad app by 光 杨.)

- Source: https://appshunter.io/ios/app/sac-rate-scuba/id6768101622 (this page in markdown: same URL + `.md`)
- Developer: [光 杨](https://appshunter.io/developer/1891134953)
- Category: Utilities, Productivity
- Price: $5.99
- Age rating: 4+
- Requires: iOS 17.0 · 2 MB
- Languages: English, French, German, Japanese, Korean, Portuguese, Chinese, Spanish
- Released: 2026-05-12
- Data updated: 2026-07-17
- User reviews in markdown: https://appshunter.io/ios/app/sac-rate-scuba/id6768101622/reviews.md

## What is SAC Rate Scuba?

SAC Rate Scuba is a paid, offline manual reference calculator for scuba divers and instructors who want transparent gas math without spreadsheets, web calculators, or live device pairing.

Use it to:
- estimate SAC pressure rate and surface RMV from dive data and a selected cylinder
- backsolve gas needed and minimum start pressure from surface RMV, depth, time, and reserve
- estimate cylinder runtime from surface RMV, depth, start pressure, and reserve
- switch between imperial and metric units plus salt or fresh water assumptions
- review transparent formulas while keeping every input manual and local

Important:
SAC Rate Scuba is manual reference only. It does not replace a dive computer or formal dive planning. The app does not provide decompression planning, no-decompression limits, GPS or dive logging, live tank integration, emergency decision support, or certification guidance.

## Chart rankings

- #189 in Top Paid · Utilities (US App Store)


## Version history (last 2 releases)

### 1.0.1 — 2026-06-07

Updated App Store screenshots and product page visuals. App functionality is unchanged.

### 1.0 — 2026-05-13

No release notes.

## More apps by 光 杨

- [ConcretePour Pro](https://appshunter.io/ios/app/concretepour-pro/id6761770433)
- [Roofing Cost Estimator](https://appshunter.io/ios/app/roofing-cost-estimator/id6761807843)
- [Cut Optimizer Pocket](https://appshunter.io/ios/app/cut-optimizer-pocket/id6761807889)
- [KitchenBatch Pro](https://appshunter.io/ios/app/kitchenbatch-pro/id6761807896)
- [Tile Layout Pocket](https://appshunter.io/ios/app/tile-layout-pocket/id6761807981)
- [TipSmart Splitter](https://appshunter.io/ios/app/tipsmart-splitter/id6761808040)

All apps by 光 杨: https://appshunter.io/developer/1891134953

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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 2026-07-17.*