Privacy Policy

Last updated: July 21, 2026

Privacy Policy

Products: ByteEngine Translator (Peiko) and PLLL
Website: https://peiko.app
Effective date: 2026-07-21
Last updated: 2026-08-02

Operator: PEIKO
Contact: support@peiko.cn

This Privacy Policy explains how PEIKO (“PEIKO,” “we,” “our,” or “us”) collects, uses, discloses, stores, and protects information when you use:

The ByteEngine Translator / Peiko mobile application for iOS and Android (the “Translator App”)
The PLLL mobile application for iOS and Android (the “PLLL App”)
Our related websites, backend services, help pages, firmware services, and support channels

Together, these are referred to as the “Services” or the “Apps.”

Not every section applies equally to both Apps. Where information relates only to the Translator App or the PLLL App, we identify that distinction below.

Please read this Privacy Policy before using the Services. Where applicable law requires consent for a particular activity, we will request that consent separately.

1. Who we are

PEIKO operates the Apps and related Services.

The Translator App is a companion application for Peiko Bluetooth translation earbuds and provides translation, speech, OCR, AI, offline translation, and related features.

The PLLL App is a companion application for compatible smart flashlights and Nova-series devices. It provides account authentication, Bluetooth device discovery and connection, device binding, flashlight controls, alarm and vibration configuration, firmware updates, help, and activity information.

The Apps currently use shared PEIKO authentication infrastructure. Depending on your account configuration, the same PEIKO account may be recognized across more than one PEIKO App.

If you have questions about this Privacy Policy or your personal data, contact us at support@peiko.cn.

2. Information we collect and process

We process information in the following categories. Some features are optional. If you do not use a feature, we generally do not process the information required only for that feature.

2.1 Account and authentication information

When you register, sign in, reset your password, or manage your account, we may process:

Email address
Password or authentication credentials
Display name or nickname
Firebase user ID
Authentication provider and sign-in method
Authentication tokens and session information
Profile information supplied by Google Sign-In or Sign in with Apple, such as your email address, display name, profile photo URL, Apple private relay email address, or provider account identifier
Account settings and profile changes you choose to make

The current PLLL App requires sign-in to access its main device features. Account creation or sign-in may be optional for some Translator App features.

Authentication is provided through Firebase Authentication. Passwords are processed by Firebase Authentication; we do not intentionally store your plaintext password in our own PEIKO backend.

Google Sign-In may request access to your basic profile and email address. Sign in with Apple may provide your name and email address, depending on your choices and whether Apple has previously provided that information.

Because the Apps use shared authentication infrastructure, account information and account identifiers may be used to recognize your account across participating PEIKO Apps.

2.2 Device, App, and network information

Depending on the App and feature, we may process:

An App-generated random installation identifier
Device platform, such as iOS or Android
Device operating system and system version
Device model or brand, where required for compatibility or support
App version and build information
App language, locale, and related regional settings
Firebase user ID and authentication status
IP address and basic network request information
Request timestamps, request identifiers, response status, and security or error information
Configuration, help, activity, and firmware-catalog requests

The PLLL App installation identifier is a randomly generated UUID stored on the device. It is not an advertising identifier, IMEI, or hardware serial number.

Our servers, Firebase, firmware hosts, and web-content providers may automatically receive IP addresses and ordinary HTTP request metadata when the Apps connect to them.

2.3 Translator App content

When you use the Translator App’s translation and AI features, we may process:

Audio and voice: microphone recordings used for speech recognition, transcription, speech translation, or conversation features
Text: text entered for translation, AI chat, group translation, feedback, or help
Images: photos taken or selected for camera translation, image translation, OCR, or QR-related features
Group translation information: messages, display name, language preferences, and related session information

This content is processed to provide the feature you request and may be transmitted to the service providers identified in Section 4.

This subsection applies to the Translator App. The current PLLL App does not use the microphone, camera, or photo library and does not submit flashlight-control data to translation, OCR, speech, or AI providers.

2.4 PLLL Bluetooth accessory and device-binding information

When you use the PLLL App to scan for, connect to, bind, or control a compatible device, the App may process:

Nearby Bluetooth device name
Bluetooth identifier, advertised hardware address, or device MAC address
Advertised Bluetooth service information
Signal strength and connection status
Compatible device model
Device binding and activation status
Binding or activation time
Identifier of the most recently connected device
Device firmware version and upgrade status
Device battery level and device operating information
Device temperature readings, where reported by the flashlight
Device lock status and related configuration state

Bluetooth scan results are generally processed temporarily on the phone to identify compatible nearby devices.

When you bind a compatible device to your account or retrieve your bound-device list, the PLLL App sends information to our backend , which may include:

Firebase user ID
Firebase authentication token
App-generated installation identifier
Random request identifier
Platform
App language
Device MAC address or stable Bluetooth identifier
Device model or name

Our backend may return the device model, device identifier, activation time, and binding status associated with your account.

2.5 PLLL controls, alarms, and vibration data

The PLLL App may process control and configuration information such as:

Lighting mode, brightness, and power state
Warning-light or flashing settings
Buzzer status and volume
Vibration sensitivity and warning thresholds
Alarm time, timer duration, and reminder type
Device lock settings
Firmware version and update status
Other compatible flashlight operating parameters

These settings and commands are generally exchanged directly between your phone and the connected flashlight over Bluetooth.

When you use vibration-scene calibration, the App receives vibration-event counts from the connected flashlight. The App may temporarily process raw event counts and locally retain derived sample values and thresholds used to configure vibration alerts.

PLLL vibration data:

Comes from the connected flashlight’s vibration sensor
Is not a microphone or audio recording
Is not precise location information
Is not intended to be health, medical, or fitness data
Is stored locally unless you separately choose to include it in a support request

We do not transmit PLLL vibration samples or ordinary flashlight-control settings to translation, speech, OCR, or AI providers.

2.6 Local history, preferences, and cached information

Depending on the App, information stored locally may include:

Translator App:

Translation history and favorites
Feature preferences
Cached service configuration
Temporary audio or image files
Downloaded offline translation models or language packs

PLLL App:

App-generated installation identifier
Cached bound-device list
Device MAC address, model, and activation time
Identifier of the most recently connected device
Vibration-scene samples and thresholds
Last applied firmware version
App language and feature preferences
Temporary firmware package data
Device-control and connection state

Some PLLL settings may also remain stored on the connected flashlight until they are changed or the device is reset.

Local information generally remains within the App’s private storage. It may be included in operating-system backups depending on your device and backup settings.

2.7 Analytics, diagnostics, and operational logs

For the Translator App, we may process:

Feature-usage events and product analytics through Firebase Analytics or our backend
Crash reports and diagnostic logs through Firebase Crashlytics
Device, App, and error information included in feedback or support requests

The current PLLL App does not integrate Firebase Analytics, Firebase Crashlytics, an advertising SDK, or a dedicated third-party analytics SDK.

However, Firebase Authentication, our backend, web pages, firmware hosts, and content hosts may create ordinary operational, authentication, security, access, and error logs. These logs may include IP address, request time, endpoint, response status, App identifier, and related technical information.

If you submit feedback or a support request, we process the content you submit and any device, App, account, or diagnostic information you choose to provide.

2.8 Bluetooth-related location permission

On some Android versions, Bluetooth Low Energy scanning is treated by the operating system as a location-related capability. The Apps may therefore declare or request location permission to discover and connect to nearby compatible Bluetooth devices.

We use this permission for Bluetooth compatibility and nearby-device discovery. We do not use it to obtain, store, or profile your precise GPS location.

On iOS, the PLLL App requests Bluetooth access and does not request location permission for its Bluetooth features.

Service providers may infer an approximate region from your IP address when you use an online feature, but we do not intentionally create precise location trails.

2.9 Information we do not intentionally collect

We do not intentionally collect:

Contacts or address-book information
Call logs or SMS content
Health or medical records
Payment-card information through the Apps
Precise GPS location trails
Information about other installed applications
Advertising identifiers for targeted advertising

The current PLLL App does not access the microphone, camera, photo library, contacts, health data, or notifications.

The Apps currently do not include advertising SDKs used to serve targeted advertisements.

3. How we use information

We use information to:

Provide, operate, maintain, and improve the Services
Create, authenticate, secure, and manage user accounts
Provide password reset and account-management functions
Recognize a PEIKO account across participating PEIKO Apps
Provide translation, speech, OCR, AI chat, group translation, and offline translation features in the Translator App
Discover, connect to, bind, and control compatible Bluetooth accessories
Associate compatible PLLL devices with a user account
Cache bound-device information for offline use and automatic reconnection
Read and configure compatible flashlight settings
Configure alarms, timers, warning modes, and vibration thresholds
Provide firmware catalogs and firmware-package downloads
Verify firmware packages and perform Bluetooth firmware updates
Deliver service configuration, help pages, activities, feedback links, and product information
Respond to support requests and feedback
Diagnose errors and improve reliability and compatibility
Protect accounts, devices, and Services from abuse, fraud, or unauthorized access
Comply with applicable law and enforce our rights

We do not use PLLL control settings or vibration samples to train translation or AI models unless we obtain separate authorization for a clearly disclosed purpose.

4. How we disclose information

We do not sell or rent personal information. We do not disclose personal information for cross-context behavioral advertising.

We disclose information only as needed to provide, secure, and maintain the Services, including to the following categories of providers:

| Provider or category | Applicable Services | Purpose | | --- | --- | --- | | Firebase Authentication (Google) | Both Apps | Account registration, authentication, password reset, account management, authentication tokens, security, and abuse prevention | | Firebase Analytics and Crashlytics (Google) | Translator App, where enabled | Product analytics, diagnostics, and crash reporting | | Google Sign-In | Both Apps | Optional account sign-in and authorized basic profile information | | Sign in with Apple | iOS versions of the Apps | Optional Apple account sign-in and authorized name or email information | | Google security or reCAPTCHA services | Where invoked by Firebase Authentication | Authentication security, verification, and abuse prevention | | Our backend ( www.peiko.app, and related PEIKO domains) | Both Apps | Service configuration, account-related APIs, support, activities, device binding, bound-device retrieval, installation identifiers, and firmware catalogs | | Google or Microsoft translation and speech services | Translator App | Online text translation, speech recognition, and speech synthesis | | OpenAI-compatible Whisper or LLM providers configured through our backend | Translator App | Speech transcription and AI-chat features | | OCR providers, such as OCR.space | Translator App | Image recognition and OCR translation | | LeanCloud | Translator App | Group translation messaging and related session services | | Google ML Kit or on-device libraries | Translator App | Offline translation and related on-device processing | | Huawei HMS ML, where applicable | Android Translator App | OCR or related on-device processing | | Firmware, CDN, image, or media-hosting providers | PLLL App | Delivery of firmware packages, firmware images, activity images, and related content | | External websites or activity providers | Where you open an external page | Display of web content and processing under the external provider’s own privacy policy |

The current PLLL App does not send flashlight controls, vibration samples, microphone recordings, photos, or translation content to Translator App AI, speech, translation, or OCR providers.

Service providers may process information in countries or regions other than where you live. Where required by law, we take appropriate steps regarding international transfers.

We may also disclose information:

When required by law, regulation, court order, or legal process
To protect the rights, safety, or security of users, PEIKO, or others
To investigate fraud, abuse, or security incidents
As part of a merger, acquisition, financing, restructuring, or transfer of business assets, subject to applicable law

5. Permissions

Depending on your device, App, and features used, the Apps may request:

Bluetooth / Nearby Devices — discovering, connecting to, binding, controlling, and updating Peiko earbuds or compatible PLLL devices
Location on older Android versions — Bluetooth Low Energy compatibility and nearby-device scanning; not precise-location tracking
Microphone — Translator App voice translation and speech features
Camera — Translator App camera translation, image recognition, and QR features
Photo Library — selecting images for Translator App translation, OCR, or QR features
Speech Recognition on iOS — Translator App speech features
Storage or Files — Translator App offline models, downloads, and temporary media where required
Display over other Apps on Android — Translator App cross-App translation overlay, where available

The PLLL App uses private App storage for device caches, vibration settings, and firmware information without intentionally accessing unrelated personal files.

You can manage permissions through your device settings. Denying a permission may limit or disable the related feature.

6. Data retention

We retain information only for as long as reasonably necessary for the purposes described in this Privacy Policy, including service operation, account management, security, dispute resolution, and legal obligations.

Retention may include:

Account information: retained while the account remains active and for a limited period afterward where required for security, fraud prevention, dispute resolution, or law
PLLL backend device-binding records: retained while needed to associate a compatible device with your account and operate related services
PLLL local data: installation identifier, device-binding cache, most recently connected device, vibration-scene samples, and firmware-version records remain locally until removed through an applicable feature, App data is cleared, or the App is uninstalled, subject to operating-system backup and restore behavior
PLLL firmware packages: generally held temporarily for verification and installation; the App retains a local record of the last applied firmware version
Translator App history and favorites: retained locally until you clear them or remove the App
Translation, speech, AI, or OCR content: processed to fulfill the request; provider retention depends on the applicable provider and our configuration
Group translation messages: retained according to the group-session lifecycle and messaging infrastructure
Analytics, crash, security, and operational logs: retained for a reasonable period for reliability, security, and product improvement
Feedback and support requests: retained as needed to respond, maintain support records, and resolve disputes

7. Your choices and rights

Depending on your location, you may have rights to:

Access personal information we hold about you
Correct inaccurate personal information
Request deletion of personal information
Restrict or object to certain processing
Withdraw consent where processing is based on consent
Request a portable copy of certain information
Complain to an applicable data-protection authority

Within the Apps, where available, you may:

Update your display name
Change or reset your password
Sign out
Delete your account
Delete PLLL vibration samples
Clear local history or preferences
Disable permissions in system settings
Clear App data or uninstall the App

PLLL account deletion

Deleting an account through the current PLLL App:

Deletes the Firebase Authentication account after any required reauthentication
Clears locally cached device-binding information associated with that Firebase user ID

At the time this Privacy Policy was last updated, the in-App deletion action does not itself automatically delete all PLLL device-binding or related business records held by our backend. It also does not automatically remove the App-generated installation identifier, locally stored vibration-scene data, or the last applied firmware-version record.

To request confirmation or deletion of associated backend records, contact support@peiko.cn. To remove remaining local PLLL data, delete vibration samples through the applicable feature, clear the App’s local data, or uninstall the App.

If your account is shared across participating PEIKO Apps, deleting the shared Firebase Authentication account may affect your access to more than one App.

Deleting a Firebase Authentication account may not automatically delete information held in separate group-messaging, backend, support, or security systems. We will process verified deletion requests in accordance with applicable law and any lawful retention requirements.

We may need to verify your identity before completing a privacy request.

8. Children’s privacy

The Services are not directed to children under 13 years of age, or the minimum age required by applicable law in the user’s jurisdiction.

We do not knowingly collect personal information from children below the applicable minimum age. If you believe a child has provided personal information to us, contact support@peiko.cn and we will take appropriate steps.

9. Security

We use reasonable technical and organizational measures designed to protect information, including encrypted network connections where supported, authentication controls, and access restrictions.

Some PLLL local information is stored using ordinary App-private preferences or files and is not separately end-to-end encrypted by the App.

No method of transmission or storage is completely secure. You should protect your account credentials, mobile device, and connected accessories.

10. Third-party links, WebViews, and external content

The Services may display or open:

Help and feedback pages
Privacy and terms pages
Official websites
Product activities
Group invitations
Firmware images or downloads
Other external web content

Some pages may open inside an App WebView and may use JavaScript, cookies, local storage, or similar web technologies. Other links may open in your device’s external browser.

External websites, content hosts, and service providers may receive your IP address and browser or device request information and are governed by their own privacy policies.

This Privacy Policy applies only to Services operated by PEIKO.

11. International users

Our providers and systems may process information in countries or regions other than where you live.

By using online features, you understand that information may be transferred and processed internationally as described in this Privacy Policy. Where required, we use appropriate measures for international transfers.

12. Changes to this Privacy Policy

We may update this Privacy Policy when our Apps, data practices, providers, or legal obligations change.

We will publish the updated version with a revised “Last updated” date. Material changes may also be communicated through the Apps or our website where appropriate.

If applicable law requires additional notice or consent, we will provide it before the change takes effect.

13. Contact us

PEIKO
Email: support@peiko.cn
Website: https://peiko.app

For privacy, access, correction, or deletion requests, include enough information for us to identify the relevant App and account, but do not send your password or authentication token by email.