# smartMFD by Guardian Avionics vs TruAirspeed

The clearest difference is rating: TruAirspeed at 4.1 against smartMFD by Guardian Avionics's 3.7. TruAirspeed also leads on monetization model (free vs free with in-app purchases). smartMFD by Guardian Avionics's advantage is update cadence (every 3 months vs every 24 months) and iOS requirement (13.0 vs 15.6). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. 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 — 3 and 8 respectively.

smartMFD by Guardian Avionics ships an update every 3 months, TruAirspeed every 24 months. The most recent releases landed on November 6, 2026 and November 1, 2026 respectively.

## The numbers

| Metric | smartMFD by Guardian Avionics | TruAirspeed |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.7 (3 ratings)](https://appshunter.io/ios/app/smartmfd-by-guardian-avionics/id599071174/reviews) | **[4.1 (8 ratings)](https://appshunter.io/ios/app/truairspeed/id855269892/reviews)** |
| Number of ratings | 3 | **8** |
| Positive reviews | — | 71.4% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 24 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 121 MB | 8 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Co guardian llc](https://appshunter.io/developer/599071177) | [James Petty](https://appshunter.io/developer/603661046) |

## What reviewers say

### smartMFD by Guardian Avionics

[App page](https://appshunter.io/ios/app/smartmfd-by-guardian-avionics/id599071174)

This app transforms your mobile device into a multifunction display for aircraft, showing flight data, engine performance, and navigation charts. It records flight data for later analysis and provides alerts for carbon monoxide levels and pulse oximetry when connected to compatible hardware.

**Highlights:** Multifunction display (MFD), Flight data recording and analysis, Engine performance monitoring, VFR/IFR charts and approach plates, CO level alerts, Pulse oximeter readings

**In-app purchases:** none


### 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


## Frequently asked questions

### Is smartMFD by Guardian Avionics free?

smartMFD by Guardian Avionics is free to download, with no in-app purchases.

### Is TruAirspeed free?

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

### Which has better reviews, smartMFD by Guardian Avionics or TruAirspeed?

TruAirspeed is rated higher. smartMFD by Guardian Avionics averages 3.7 out of 5 from 3 ratings, while TruAirspeed averages 4.1 from 8 ratings.

### Do smartMFD by Guardian Avionics or TruAirspeed have ads?

Neither smartMFD by Guardian Avionics nor TruAirspeed shows ads.

### Which is updated more often, smartMFD by Guardian Avionics or TruAirspeed?

smartMFD by Guardian Avionics ships an update every 3 months, and TruAirspeed every 24 months. Most recently, smartMFD by Guardian Avionics was updated on November 6, 2026 and TruAirspeed on November 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.*