# FlyGuard: Drone Detector — Preflight Check & Lost Finder

> Preflight Check & Lost Finder (iPhone/iPad app by HOJUNG KIM.)

- Source: https://appshunter.io/ios/app/flyguard-drone-detector/id6815177282 (this page in markdown: same URL + `.md`)
- Developer: [HOJUNG KIM](https://appshunter.io/developer/6801067621)
- Category: Utilities
- Price: Free
- Age rating: 4+
- Requires: iOS 13.0 · 30 MB
- Languages: American English, French (France), German (Germany), Hindi, Indonesian, Italian, Japanese, Korean, Malay, European Portuguese and 6 more
- Released: 2026-09-24
- Data updated: 2026-09-28
- User reviews in markdown: https://appshunter.io/ios/app/flyguard-drone-detector/id6815177282/reviews.md

## What is FlyGuard?

FlyGuard is a set of checks for before and after a drone flight. No server, no sign-in, no ads — it runs on your iPhone's own sensors.

■ Drone sound detection — listens for propeller harmonics and tells you when an aircraft may be nearby. Audio is never recorded; it is reduced to frequencies on the spot.
■ Locator beep search — listens for the buzzer a downed aircraft sounds and tells you when it is within earshot.
■ Direction — draws the bearing to a marked point over the camera view, to help find a lost aircraft.
■ GNSS health — position accuracy and wander, with a plain go / not-advised call.
■ Propeller check — diagnoses damage or imbalance from the hover sound.
■ Vibration — a vibration spectrum from the phone placed on the airframe.
■ Weather watch — a barometric trend that warns when the sky is about to change.

16 languages. Nothing leaves the phone except map tile requests to OpenFreeMap.

Note: readings are an aid, not a guarantee that every aircraft is detected. The pilot decides whether to fly under local rules and actual conditions.


## Version history (last 1 release)

### 1.0 — 2026-09-25

No release notes.

## More apps by HOJUNG KIM

- [나담 - 영정·장수사진·증명사진·AI 셀프 사진관](https://appshunter.io/ios/app/ai/id6801067469)
- [FlyReady: Clima Drones](https://appshunter.io/ios/app/flyready-clima-drones/id6801145750)
- [FlySense - Drone Site Check](https://appshunter.io/ios/app/flysense-drone-site-check/id6805844910)

All apps by HOJUNG KIM: https://appshunter.io/developer/6801067621

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-28.*