# Earbud Checker: Latency & L/R — Bluetooth lag, L/R & mic test

> Bluetooth lag, L/R & mic test (iPhone/iPad app by 3810 Production.)

- Source: https://appshunter.io/ios/app/earbud-checker-latency-and-lr/id6824147213 (this page in markdown: same URL + `.md`)
- Developer: [3810 Production](https://appshunter.io/developer/6815889875)
- Category: Utilities, Music
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 12 MB
- Languages: American English, Japanese
- Released: 2026-10-19
- Data updated: 2026-10-24

## What is Earbud Checker?

Earbud Checker tests your earphones and headphones in minutes.
Step-by-step picture guides show exactly what to do, so anyone can run every test.

MEASURE LATENCY (AUDIO LAG)
The app plays a short click and listens for it with your phone's own microphone, then shows how many milliseconds your earbuds add. No stopwatch, no guessing.
- Works with Bluetooth, wired and USB earphones
- Tells you if the delay is fine for video, music or games
- Use the number for in-game audio offset settings
- iOS also shows the latency the system reports, next to the measured value

FREE TESTS
- Left / Right: a voice says "Left" and "Right" in each ear
- Volume balance: find out if one side is quieter
- Phase (polarity): spot reversed wiring
- Frequency range: how low and how high you can hear with these earphones
- Rattle & distortion: deep bass sweeps reveal buzzing
- Earphone mic: record and play back, and see which mic was actually used
- Full checkup: run the basic tests in order and get one result card

EXTRA FEATURES
Watch one ad to use them for 24 hours, or unlock them forever with a one-time purchase (which also removes ads).
- Precise latency: 10 rounds with the spread
- History and comparison between your earphones
- Export the result card as an image
- Sound direction test

GOOD TO KNOW
- This is not a medical device and does not test your hearing.
- Recordings and measurements stay on your device. You can optionally share a latency result anonymously to help build typical figures per model.
- The same earphones can measure differently with another phone, codec or game mode.

Privacy Policy: https://3810.pro/en/privacy-policy/earphone
Contact: https://3810.pro/en/contact

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Extra features | $2.99 | one-time |


## Is Earbud Checker safe?

Not enough ratings yet to assess Earbud Checker.

## Is Earbud Checker legit?

Earbud Checker: Latency & L/R appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Earbud Checker is 65 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 2 releases)

### 1.1.0 — 2026-10-21

v1.1.0
- Added "Other checkers" to Settings. Open the right app or page when you want to check screen smoothness, your phone's screen, touch and cameras, or a game controller.

### 1.0.0 — 2026-10-20

No release notes.

## More apps by 3810 Production

- [Dashi Dashboard](https://appshunter.io/ios/app/dashi-dashboard/id6815889873)
- [Nurunuru Checker](https://appshunter.io/ios/app/nurunuru-checker/id6815909918)
- [アキバ系.net ‐ 推し・イベントカレンダー](https://appshunter.io/ios/app/net/id6817211662)
- [Phone Checkup - Device Test](https://appshunter.io/ios/app/phone-checkup-device-test/id6821094489)

All apps by 3810 Production: https://appshunter.io/developer/6815889875

---

*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 2026-10-24.*