# smartMFD by Guardian Avionics vs Unit Convert Go

The clearest difference is in-app purchases: Unit Convert Go at none against smartMFD by Guardian Avionics's 10. Unit Convert Go also leads on update cadence (every 2 weeks vs every 3 months). smartMFD by Guardian Avionics's advantage is device support (4 vs 2) and iOS requirement (13.0 vs 16.0). On price and ads there is nothing between them.

Both are free to download. smartMFD by Guardian Avionics sells 10 in-app purchases, starting at $0.49 per 7 days. Unit Convert Go asks for nothing beyond the download.

smartMFD by Guardian Avionics ships an update every 3 months, Unit Convert Go every 2 weeks. The most recent releases landed on October 11, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | smartMFD by Guardian Avionics | Unit Convert Go |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.7 (3 ratings)](https://appshunter.io/ios/app/smartmfd-by-guardian-avionics/id599071174/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 121 MB | 3 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Co guardian llc](https://appshunter.io/developer/599071177) | [晓 郭](https://appshunter.io/developer/1895645928) |

## 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 (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Plan 4 (Weekly) | $0.49 | per 7 days |
| Plan 1 (Monthly) | $9.99 | per month |
| Plan 3 (Monthly) | $12.99 | per month |
| Plan 4 (Monthly) | $24.99 | per month |
| Plan 5 (Monthly) | $29.99 | per month |
| Plan 1 (Yearly) | $99.99 | per year |
| Plan 2 (Yearly) | $149.99 | per year |
| Plan 3 (Yearly) | $199.99 | per year |
| Plan 4 (Yearly) | $249.99 | per year |
| Plan 5 (Yearly) | $299.99 | per year |


### Unit Convert Go

[App page](https://appshunter.io/ios/app/unit-convert-go/id6772014993)

This utility app offers fast, offline unit conversions for everyday needs. It supports a wide range of units including length, weight, temperature, and currency, with live, two-way conversion as you type. Favorite conversions can be pinned for quick access, and all data is kept private on your device.

**Highlights:** Live, two-way conversion, Offline-friendly, Pin favorite conversions, Recent conversions saved, Latest currency rates, Light and dark mode

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is smartMFD by Guardian Avionics free?

smartMFD by Guardian Avionics is free to download, with in-app purchases available.

### Is Unit Convert Go free?

Unit Convert Go is free to download, with no in-app purchases.

### Do smartMFD by Guardian Avionics or Unit Convert Go have ads?

Neither smartMFD by Guardian Avionics nor Unit Convert Go shows ads.

### Which is updated more often, smartMFD by Guardian Avionics or Unit Convert Go?

smartMFD by Guardian Avionics ships an update every 3 months, and Unit Convert Go every 2 weeks. Most recently, smartMFD by Guardian Avionics was updated on October 11, 2026 and Unit Convert Go on October 15, 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.*