Privacy Policy

Short version

Pink Crumb listens to a short hum through the iPhone microphone, runs an FFT on-device with Apple's Accelerate framework (vDSP) to find the dominant frequency, and maps that frequency to a musical note label such as C4 or A4. The short m4a audio clip, the dominant frequency in hertz, the note label, and any note you type all stay on your device. There are no accounts, no analytics, and no third-party SDKs that contact a server. The only network calls the app makes are to Apple's StoreKit when you choose to subscribe or unlock the Lifetime tier.

Who we are

Pink Crumb is published by Danielius Studio LLC, a Wyoming limited liability company at 30 N Gould St, Suite #5280, Sheridan, WY 82801, USA (“we”, “us”).

Data we do NOT collect

• No account, no email, no password — the app has no signup.
• No analytics, no telemetry, no event tracking.
• No advertising identifiers (no IDFA, no fingerprinting).
• No usage data sent off the device.
• No camera. Pink Crumb never opens the camera.
• No Photos library access. Pink Crumb does not read or write to your Photos library.
• No location, no contacts, no calendar.
• No HealthKit, no Health data.
• No speech recognition. Pink Crumb does not transcribe what you hum or attempt to recognize words.

Microphone permission

Pink Crumb requests Microphone access (the NSMicrophoneUsageDescription permission) so that Apple's AVAudioEngine can capture a short audio buffer while you hum. The microphone is opened only while you are inside the capture screen and is released as soon as the recording stops.

Pink Crumb does NOT run speech recognition, voice-print analysis, speaker identification, or any other intelligence on the audio. The buffer is fed to a real FFT (vDSP_fft_zrip) to find the loudest frequency bin; nothing about the recording is interpreted as language.

What stays on your device

• Your crumb entries (the short m4a audio clip of the hum, the dominant frequency in hertz, the matched musical note label such as C4 or A4, an optional note you typed, and the created-at timestamp). Stored in on-device SwiftData with the audio bytes held as external storage.
• The date the app was first launched (used to time the three-day no-strings free window). Stored in UserDefaults.
• Whether the day-three gift screen has been acknowledged.

The audio clip and the analysis result are written only to Pink Crumb's private container. The app does not upload the audio anywhere and does not save it to any shared location.

All of the above lives on your device and never leaves it. Uninstalling the app deletes everything Pink Crumb has stored.

On-device audio analysis

Pink Crumb runs the FFT and the frequency-to-note mapping locally using Apple's Accelerate framework (vDSP) on your iPhone's CPU. The audio buffer is passed to the FFT in-process and never leaves the device. Pink Crumb does not use any cloud audio service, does not contact a music-recognition API, and does not match your hum against a song database.

Lock Screen widget

Pink Crumb Pro includes a Lock Screen widget that shows today's crumb count. The widget reads only the count and the timestamp of the most recent entry from an App Group container on your device. No audio data is rendered on the Lock Screen and nothing is sent off the device for the widget to function.

In-app purchases

If you choose to subscribe (Monthly, Annual) or buy the Lifetime unlock, that transaction is handled by Apple's StoreKit. Apple processes the payment and shares only the receipt with the app so we can verify your entitlement. We never see your card number, billing address, or any personal information beyond Apple's opaque transaction identifier.

Subscription receipts are stored on-device by iOS and used to validate your entitlement when you re-open the app. They are not sent to any server we operate.

Family Sharing

Pink Crumb Pro purchases (Monthly, Annual, Lifetime) are Family-Shareable through Apple's standard Family Sharing mechanism. Apple handles eligibility checks; we do not see who is in your family group.

Children

Pink Crumb is rated 4+ in the App Store. Because the app collects no data at all, it complies with COPPA and similar children's-privacy regulations by design.

Your rights

Because Pink Crumb does not collect data, there is nothing for us to export, correct, or delete on your behalf. To revoke Microphone permission, use iOS Settings → Privacy & Security → Microphone. To remove all on-device state, delete the app.

For questions, write to dchalikovasss@gmail.com.

Changes

If we ever introduce a feature that involves any data leaving the device (for example, cloud sync or sharing), this page will be updated and the “Last updated” date at the top will change. For v1.0, no such feature exists.