# TruAirspeed vs CX

The clearest difference is price: TruAirspeed at Free against CX's $19.99. TruAirspeed also leads on review sentiment (71% vs 36%) and rating (4.1 vs 3.7). CX's advantage is update cadence (every 8 months vs every 24 months) and chart position (#74 vs unranked). On ratings volume, ads, in-app purchases and device support there is nothing between them.

TruAirspeed is free to download; CX costs $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.

TruAirspeed holds the better App Store score, 4.1 against 3.7. Both are backed by a comparable volume of ratings — 8 and 11 respectively. Written reviews point the same way: 71% of TruAirspeed's written reviews are positive against 36% of CX's.

TruAirspeed ships an update every 24 months, CX every 8 months. The most recent releases landed on June 2, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | TruAirspeed | CX |
| --- | --- | --- |
| Price | **Free** | $19.99 |
| Rating | **[4.1 (8 ratings)](https://appshunter.io/ios/app/truairspeed/id855269892/reviews)** | [3.7 (11 ratings)](https://appshunter.io/ios/app/cx-3-flight-computer/id1645428895/reviews) |
| Number of ratings | 8 | **11** |
| Positive reviews | **71.4% of reviews** | 35.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 24 months | **Every 8 months** |
| Monetization | **Free** | Paid |
| Best chart rank | — | **#74** |
| Size | 8 MB | 3 MB |
| Requires iOS | **15.6** | 17.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [James Petty](https://appshunter.io/developer/603661046) | [ASA](https://appshunter.io/developer/334278379) |

## What reviewers say

### TruAirspeed

[App page](https://appshunter.io/ios/app/truairspeed/id855269892)

This utility calculates true airspeed, pressure altitude, density altitude, and Mach number. It accounts for compressibility effects and offers unit choices and keypad styles. Users can also input a correction factor for their airspeed indicator.

**Highlights:** True airspeed calculation, Pressure and density altitude calculation, Mach number calculation, Compressibility effects accounted for, Choice of input/result units, Calculator or telephone keypad options, Airspeed indicator correction factor

**Features:** macOS Compatibility

**In-app purchases:** none


### CX

[App page](https://appshunter.io/ios/app/cx-3-flight-computer/id1645428895)

**Currently charting:** #74 Top Paid · Utilities (US App Store)

This aviation tool simplifies flight planning for pilots. It offers accurate calculations for time, speed, distance, fuel, and more, along with unit conversions and a built-in calculator. Designed for ease of use, it guides users through flight planning and execution with a natural menu flow.

**Highlights:** Flight planning calculations, Time, speed, distance functions, Fuel and altitude calculations, Unit conversions (12 categories), Weight and balance calculations, Holding pattern details, Built-in calculator, clock, timer

**In-app purchases:** none


## Frequently asked questions

### Is TruAirspeed free?

TruAirspeed is free to download, with no in-app purchases.

### Is CX free?

CX costs $19.99, with no in-app purchases.

### Which has better reviews, TruAirspeed or CX?

TruAirspeed is rated higher. TruAirspeed averages 4.1 out of 5 from 8 ratings, while CX averages 3.7 from 11 ratings.

### Do TruAirspeed or CX have ads?

Neither TruAirspeed nor CX shows ads.

### Which is updated more often, TruAirspeed or CX?

TruAirspeed ships an update every 24 months, and CX every 8 months. Most recently, TruAirspeed was updated on June 2, 2026 and CX on September 22, 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.*