# FlyHJ Sync vs MachDB

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.

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

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

## The numbers

| Metric | FlyHJ Sync | MachDB |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/machdb/id6757681004/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 2 weeks |
| Monetization | — | Free |
| Size | 5 MB | 16 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Carson Lee](https://appshunter.io/developer/1828022160) | [MachDB LLC](https://appshunter.io/developer/1868240819) |

## What reviewers say

### FlyHJ Sync

[App page](https://appshunter.io/ios/app/flyhj-sync/id6748925501)

**In-app purchases:** none


### MachDB

[App page](https://appshunter.io/ios/app/machdb/id6757681004)

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

**In-app purchases:** none


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