HDZap
FPV Lap Timer with Goggle OSD
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
HDZap is a manual lap timer for FPV drone racing.
Tap the LAP button as your pilot crosses the finish line — the split time instantly appears on their Digital FPV Goggle OSD via the M5StickS3 Bluetooth bridge.
No hardware? No problem. HDZap works as a standalone lap timer — race history, best laps, and pace tracking all work without any external device.
FEATURES
• One-tap lap recording
• Live lap time on Digital FPV Goggle OSD via ESP-NOW
• Race history with best lap and lap averages
• Share race results as an image
• Flight battery voltage and percentage from backpack telemetry
• Adjustable OSD layout
• Low-latency BLE connection
OPTIONAL HARDWARE (for OSD display)
• M5StickS3 (ESP32-S3) flashed with HDZap firmware
• Digital FPV Goggle with ELRS backpack
The firmware and setup guide are available at the support link below.
HDZAP PREMIUM (OPTIONAL SUBSCRIPTION)
Swap the default iOS voice for natural AI announcer voices powered by AWS Polly and Microsoft Azure — 30 voices in English and Japanese.
• HDZap Premium Monthly — JPY 450 / month
• HDZap Premium Yearly — JPY 4,000 / year
Subscriptions auto-renew unless cancelled at least 24 hours before the end of the current period. Manage or cancel anytime in Settings → Apple ID → Subscriptions. Payment is charged to your Apple ID account at confirmation of purchase.
Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://saqoosha.github.io/HDZap/privacy/
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Pace-only announcements
• The Audio master switch is now "Voice announcements", with "Announce lap times" as its own setting underneath. Previously the two were one switch, so turning lap times off also silenced the countdown and the race summary.
• Switch lap times off and leave "Announce need / bank" on, and each lap you hear just the pace correction — "need 0.2 seconds per lap" — with no lap number and no time.
• The best-lap call is independent, so a new fastest lap is still announced with lap times off.
Nothing changes unless you want it to: the new setting defaults to on, so announcements sound exactly as they did before.
The developer, Saqoosha, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Purchases
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Tomohiko Koyama
- Size
- 2.5 MB
- Category
- Sports
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later. - Mac
Requires macOS 15.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.0 or later.
- iPhone
- Languages
- English and Japanese
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- HDZap Premium Monthly $4.99
- HDZap Premium Yearly $44.49
- Copyright
- © 2026 Saqoosha
