# Surface Air Consumption vs WingCalc

The clearest difference is review sentiment: Surface Air Consumption at 100% against WingCalc's 33%. Surface Air Consumption also leads on rating (5.0 vs 2.0) and in-app purchases (none vs 1). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. WingCalc sells 1 one-off in-app purchase. Surface Air Consumption asks for nothing beyond the download.

Surface Air Consumption holds the better App Store score, 5.0 against 2.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively. Written reviews point the same way: 100% of Surface Air Consumption's written reviews are positive against 33% of WingCalc's.

Both ship on a similar rhythm, roughly weekly. Both last shipped on June 1, 2026.

## The numbers

| Metric | Surface Air Consumption | WingCalc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/surface-air-consumption/id1532974489/reviews)** | [2.0 (1 ratings)](https://appshunter.io/ios/app/wingcalc/id1550632188/reviews) |
| Number of ratings | **2** | 1 |
| Positive reviews | **100.0% of reviews** | 33.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Weekly | Weekly |
| Monetization | **Free** | Free with in-app purchases |
| Size | 1 MB | 7 MB |
| Requires iOS | **13.6** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Leridian Dynamics, Inc.](https://appshunter.io/developer/1356342542) | [App4Life Sweden AB](https://appshunter.io/developer/507125048) |

## What reviewers say

### Surface Air Consumption

[App page](https://appshunter.io/ios/app/surface-air-consumption/id1532974489)

This utility calculates surface air consumption (SAC) rates and air needs at depth using only user-provided dive profile data. It does not compute nitrogen absorption or decompression limits. Always prioritize safety and consult official decompression tables.

**Highlights:** Calculates SAC Rate, Estimates air requirements at depth, User input based calculations, Dive profile analysis, Focuses solely on air consumption

**Features:** macOS Compatibility

**In-app purchases:** none


### WingCalc

[App page](https://appshunter.io/ios/app/wingcalc/id1550632188)

This aviation calculator provides essential flight calculations for pilots, from preflight planning to in-flight decisions. It offers instant results for density altitude, runway wind components, and navigation planning, with a dashboard for all flight parameters.

**Highlights:** Density altitude and pressure altitude calculations, Runway wind component determination, Navigation planning with wind correction, Flight parameters dashboard, Live GPS with real-time coordinates, Automatic magnetic variation detection

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| WingCalc Pro | $0.99 | one-time |


## Frequently asked questions

### Is Surface Air Consumption free?

Surface Air Consumption is free to download, with no in-app purchases.

### Is WingCalc free?

WingCalc is free to download, with in-app purchases available.

### Which has better reviews, Surface Air Consumption or WingCalc?

Surface Air Consumption is rated higher. Surface Air Consumption averages 5.0 out of 5 from 2 ratings, while WingCalc averages 2.0 from 1 ratings.

### Do Surface Air Consumption or WingCalc have ads?

Neither Surface Air Consumption nor WingCalc shows ads.

### Which is updated more often, Surface Air Consumption or WingCalc?

Surface Air Consumption ships an update weekly, and WingCalc weekly. Most recently, Surface Air Consumption was updated on June 1, 2026 and WingCalc on June 1, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*