Spy Ear: Recorder, Hearing Aid

Hearing aid, voice recorder & long-range listening device for your headphones.

Struggling to hear clearly across a noisy room or crowded space? Poor sound quality and audio drop-outs make most amplification apps unreliable exactly when you need them most. Spy Ear solves this: pair your headphones, point your phone toward the sound source, and get stable, real-time hearing and recording - with a stream that never cuts out.

--- HEARING AID + SOUND AMPLIFIER ---

Spy Ear turns your Android phone into a portable hearing aid and sound amplifier - no extra hardware, no purchase required. Wired or Bluetooth headphones become your ears. Point your phone toward any distant voice, quiet speaker, or ambient sound source and hear it with real clarity, even across a noisy cafe, a large lecture hall, or an open outdoor space.

- Portable hearing aid - on-demand amplification whenever you need it, no specialist hardware required

- Sound amplifier - boost quiet voices and distant audio without distorting what you hear

- Voice amplifier - bring low-volume speakers and soft conversations into focus

- Microphone amplifier - direct mic input routed straight to your headphones, instantly

--- LISTENING DEVICE + LONG RANGE LISTENING ---

A native C++ Oboe audio pipeline powers the mic-to-headphone routing. This is not a software-layer workaround - it is a low-latency audio engine that keeps delay minimal and response tight, so what you hear through your headphones matches real time.

- Low-latency audio engine - C++ Oboe pipeline minimizes mic-to-headphone delay

- Long range listening - point the phone toward a distant sound source and follow it clearly

- Listening device - one phone, one pair of headphones, zero extra equipment

- Foreground audio service - stream stays alive when the screen is off; no babysitting, no restarts

--- VOICE RECORDER + AUDIO RECORDER ---

When a moment is worth keeping, one tap starts a recording. Files are saved locally and shareable directly from the app. No separate recorder app. No cloud upload. No clip-stitching after the fact.

- One-tap recording - start and stop with a single tap, even mid-session

- Voice recorder - capture lectures, meetings, interviews, and ambient sound clearly

- Audio recorder - shareable files saved fully on-device

- Sound recorder - everything stays on your phone; your audio never leaves it

--- BLUETOOTH HEARING AID + WIRED HEADPHONE SUPPORT ---

Connect any wired or Bluetooth headset. The app detects your connected output device and routes audio automatically - no manual configuration. Disconnect one, connect another, the stream follows.

- Bluetooth hearing aid - pair a BT headset and amplify sound wirelessly

- Automatic wired/BT switching - the stream follows your headphones without interruption

- Works with earbuds, over-ear headphones, and standard headsets

--- CUSTOMIZATION ---

Material 3 Compose interface with light and dark theme support. Clean, modern layout optimized for one-handed use. Controls are minimal so you can stay focused on listening, not on the app.

--- DEVICE COMPATIBILITY ---

Spy Ear runs on Android devices across major OEMs. Tested and functional on Samsung Galaxy, Google Pixel, OnePlus, Oppo, Xiaomi, and Realme handsets. Foreground service behavior follows standard Android audio APIs, so performance is consistent across these device families.

--- PRIVACY + PERMISSIONS ---

RECORD_AUDIO - required to capture microphone input for real-time routing and recording.

FOREGROUND_SERVICE_MICROPHONE - keeps the audio stream running when the screen is off.

MODIFY_AUDIO_SETTINGS - configures wired/BT routing and sample rate.

BLUETOOTH_CONNECT (Android 12+) - connects to Bluetooth headsets for audio output.

INTERNET - serves ads (AdMob). No audio is ever uploaded. No account required. Fully on-device.

🔒 Use Responsibly

Spy Ear is for personal hearing assistance and audio enhancement only. Do not use it to monitor others or violate privacy laws. Not a medical device or a replacement for hearing aids.