Comparison

FlyHJ Sync vs MachDB

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

FlyHJ Sync

Read full description

**FlyHJ Sync** - Transfer aircraft data from your HondaJet's Garmin G3000 SD card directly to FlyHJ servers using your iPhone or iPad. **For HondaJet Operators Only** Requires an active FlyHJ aircraft support subscription. Streamline your monthly CMC data submissions and troubleshooting workflows with the fastest, most convenient transfer method available. **Key Features:** • **Smart File Transfer** - Automatically discovers and compresses flight data files for efficient upload • **Network Control** - Choose WiFi-only or cellular uploads based on your preferences • **Aircraft Management** - Select from your accessible aircraft fleet for accurate data association • **SD Card Cleanup** - Safely remove uploaded files while preserving essential system files • **Queue Management** - Files automatically queue for WiFi upload when on cellular networks **How It Works:** 1. Connect your Garmin G3000 SD card via adapter 2. Select your aircraft and let the app discover files 3. Choose your upload preferences and transfer 4. Optional cleanup removes processed files from your SD card **Perfect for:** - Monthly CMC data submission requirements - Sending diagnostic data to FlyHJ support teams - Flight data archiving and record-keeping **Requirements:** - iPhone/iPad with iOS 17.6+ - SD card adapter (USB-C or Lightning) - Active FlyHJ subscription

About

MachDB

Easily download and transfer Garmin avionics database updates to an SD card using your iPhone or iPad. This app supports a wide range of Garmin avionics and requires only a standard USB-C SD card reader. Updates are fast and convenient for field use.

Highlights
  • Download Garmin database updates
  • Transfer updates to SD card
  • iPhone and iPad compatible
  • Supports various Garmin avionics
  • Uses standard USB-C SD card reader
  • Fast Wi-Fi/Cellular downloads
Read full description

MachDB allows you to download and transfer Garmin avionics database updates to an SD card in seconds using your iPhone or iPad for fast updates in the field. All you need is your iPhone or iPad and a standard USB-C SD card reader. No proprietary hardware required! Download fast over Wi-Fi or Cellular connections. MachDB is compatible with all modern Garmin avionics that use SD cards or USB keys for database updates, using your existing Jeppesen or Garmin database account. Supported avionics include: -Garmin G1000, G1000 Nxi, Perspective and Perspective + -Garmin G3000 and Perspective Touch -Garmin GTN 600 and 700 Xi -Garmin G500, G600 and G700 -Garmin G3X and G2000 -Garmin GI 275 Supported Database Providers: -Jeppesen -Garmin

Screenshots

FlyHJ Sync3 screens
MachDB3 screens

Verdict

The call

The clearest difference is update cadence: FlyHJ Sync at weekly against MachDB's every 2 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

FlyHJ Sync ships an update weekly, MachDB every 2 weeks. The most recent releases landed on September 29, 2026 and October 8, 2026 respectively.

Scorecard1 real difference · 9 level
FlyHJ Sync versus MachDB: the parameters behind the verdict, then further details
ParameterFlyHJ SyncMachDB
PriceFreeFree
Rating—5.0 (3 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—3 — better
Update frequencyWeekly — betterEvery 2 weeks
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.617.0 — better
Further details — not scored
Size5 MB16 MB
Age rating4+4+
DeveloperCarson LeeMachDB LLC

In-app purchases

None

FlyHJ Sync

No in-app purchases

None

MachDB

No in-app purchases

Questions

Is FlyHJ Sync free?
FlyHJ Sync is free to download, with no in-app purchases.
Is MachDB free?
MachDB is free to download, with no in-app purchases.
Do FlyHJ Sync or MachDB have ads?
Neither FlyHJ Sync nor MachDB shows ads.
Which is updated more often, FlyHJ Sync or MachDB?
FlyHJ Sync ships an update weekly, and MachDB every 2 weeks. Most recently, FlyHJ Sync was updated on September 29, 2026 and MachDB on October 8, 2026.

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