LingoAI Translate Privacy Policy

Last updated: 2026-10-30

Overview

LingoAI (“we,” “our,” or “the app”) is a translator built to work on your device. By default, everything you translate stays on your iPhone or iPad: the app translates with Apple’s on-device engine or with an offline translation model you can download once, needs no account, and does not upload your text. There is also an optional Cloud engine that you have to switch on yourself; this policy explains exactly what changes when you do, along with everything else the app processes and the choices you have.

Summary

No account is required. Signing in is optional and only keeps your Cloud credits when you change devices. If you sign in, we store your email address and how you signed in.
The default engines (LingoAI Model and Apple, called System before version 3.1) translate on your device. Your text is not sent to us.
The LingoAI Model is an optional one-time download from Hugging Face or ModelScope. Downloading it reveals your IP address to those services and to our server, but sends none of your text or personal details.
Cloud is optional and off by default. Only when you select it is the text you translate sent to our server to be translated by a third-party AI model. We do not store that text.
The LingoAI Keyboard contains no network code. It never sends or stores what you type.
The free version shows ads from Google AdMob. Pro and Remove Ads turn them off.
Feedback you choose to send from Settings goes to our feedback server, together with the device details the form shows you first.

Data We Collect and Process

Text you translate on your device

Text you type, paste, dictate, scan or import is translated on your device by the LingoAI Model (a translation model you download once) or by the Apple engine (Apple’s built-in on-device translation).
Translation history, saved presets, Relay conversations and Relay voice recordings are stored in the app on your device.
None of this is uploaded to our servers.
If the Apple engine needs a language pack, iOS downloads it from Apple. The download is handled by iOS, not by LingoAI.

Downloading the LingoAI Model

The model is not included in the app. It downloads only after you ask for it, and an interrupted download you asked for carries on when you return to the app, until you pause it or delete it. When it runs:

Choosing a download source: the app asks our server at ai.mzjpg.com, which runs on Cloudflare, which country your IP address appears to be in, so it can pick a nearby source: ModelScope in mainland China, Hugging Face elsewhere. Our server sends the country back and does not store it. If it can’t be reached, the app sends a small test request to each of the two sources and uses whichever answers first, or else your device’s region setting.
Downloading the file: the app fetches the model from Tencent’s official repositories on Hugging Face (huggingface.co) or ModelScope (modelscope.cn), and may switch to the other if one fails or is slow. Those services and their delivery networks see your IP address and ordinary request details, such as the time and the file requested, and handle them under their own privacy policies.
What is not sent: the requests contain no translations, no account or device identifier, and nothing you typed.
The model is stored in the app on your device. It translates without a connection and sends nothing back to those services.

Cloud translation (optional)

Cloud is off until you select it in the engine picker. While it is selected:

What is sent: the text you ask it to translate, the source and target languages, the tone you picked (Match Source, Formal or Casual), and the quality tier. It is sent over HTTPS to our server at ai.mzjpg.com, which runs on Cloudflare.
Who translates it: our server forwards the request through Cloudflare AI Gateway to a third-party AI model provider we choose. Today these are Nebius (DeepSeek models), Alibaba Cloud Model Studio (Qwen, DeepSeek and GLM models) and Google (Gemini models). The provider can change without an app update, and a request may be retried with another provider if the first one fails.
What we keep: we do not store your text or its translation. Response caching and request/response logging are turned off on our gateway. Our operational logs record only non-content details, such as which model answered, how many tokens were used, how many credits were charged, and timings.
What providers keep: each provider processes the request under its own API terms, and some may retain inputs for a limited time, for example for abuse monitoring. Please don’t use Cloud for text you would not want to leave your device. The on-device engines are always available for that.
If Cloud cannot be reached, the app falls back to translating on your device.

Device attestation and Cloud credits

To keep the Cloud service from being abused, and to keep track of the credits you buy, the app uses Apple’s App Attest service to register your installation with our server. This happens when you select Cloud, sign in or buy credits, and not before. Our server stores:

an App Attest key identifier and its public key, which prove requests come from a genuine copy of LingoAI;
a random account identifier with your credit balance and whether Pro is active;
a ledger of credit changes, keyed by App Store transaction identifiers (transactionId, originalTransactionId, and appTransactionId). These make sure each purchase is credited exactly once and let your balance come back when you reinstall with the same Apple Account.

This data identifies an installation and its purchases. Unless you sign in, it does not identify you by name or contact details. It is not linked to your translations.

Signing in (optional)

You never have to sign in. If you choose to, with Apple, Google or a code sent to your email, your Cloud credits can follow you to a new device:

What we store: at account.mzjpg.com, which runs on Cloudflare, your email address (with Apple this can be a private relay address, and may be absent), which sign-in methods you use and the identifier each provider gives us, linked to your credit account. For Apple sign-ins we also keep a token so we can revoke Apple’s access when you delete your account.
Who else is involved: Apple or Google confirm who you are under their own privacy policies. Email codes, and emails about your account such as a deletion confirmation or a refund that takes credits back, are sent through our Cloudflare email service.
Other mzjpg apps: the same sign-in is the same account in our other apps. Credits are kept separately for each app.
Your translations are never linked to your account, because we don’t store them.

LingoAI Keyboard

The keyboard types without any special permission. Translating as you type needs Full Access, only because Apple’s on-device translator is not available to keyboards without it.
With Full Access on, the keyboard reads the text in the field you’re typing in and translates it on your device with Apple’s engine. It contains no network code, so nothing you type leaves your device, and it does not keep a record of your keystrokes.
The keyboard reads your keyboard settings (languages, sound and haptics) from the LingoAI app through a shared App Group on your device.
In password fields, iOS always switches to the system keyboard, so the LingoAI Keyboard never sees them.

Microphone and speech recognition

Voice input uses your microphone and Apple’s Speech framework. Depending on your device and language, Apple may process the audio on the device or on Apple’s servers under Apple’s privacy policy. We do not receive your audio.
Relay voice messages are recorded and stored on your device.

Camera and photos

The camera and any photos you pick are used only to recognize text on the device. Images are not uploaded or kept by the app.

Feedback and ratings

The app may occasionally ask whether you’d like to rate it. It records anonymous, identifier-free events (such as “a translation was completed”) so that the prompt appears at a reasonable moment.
If you send feedback from Settings, the form sends your message, your email address if you enter one, any screenshots you attach, and the device details shown in the form (such as device model, iOS version, app version and language) to our feedback server at rate.mzjpg.com, which runs on Cloudflare. We use this only to reply to you and fix problems.

Advertising

The free version shows ads from Google AdMob. Google and its partners may collect data such as device identifiers, IP address, coarse location and ad interactions to deliver and measure ads, under Google’s own policies.
Where required by law, a consent form from Google lets you choose how your data is used for ads.
Buying LingoAI Pro or Remove Ads turns ads off.

”Our Apps” in Settings

To list our other apps, the app requests public app information from Apple’s iTunes Lookup API, using your App Store country and language. No personal data is sent.

Purchases

Purchases are handled by Apple through the App Store. We never see your payment details. For Cloud credits and the Pro credit grant, the app sends Apple-signed transaction records to our server so the credits can be added to your balance, as described above.

How We Use Data

To translate on your device, and in the cloud when you select Cloud.
To credit purchases, keep your credit balance, and restore it after a reinstall.
To protect the Cloud service against abuse.
To answer feedback and fix bugs.
To show and measure ads in the free version.

We do not use your translations to train models, and we do not build profiles of you.

We do not sell or rent your data.
Cloud requests are shared with the AI model provider that translates them, through Cloudflare, only while you have Cloud selected.
If you sign in, Apple or Google confirm your identity as described above.
Ad data is handled by Google AdMob as described above.
If you download the LingoAI Model, Hugging Face or ModelScope see your IP address and the request details, as described above.
Otherwise, data leaves the app only when you share or export it yourself.

Data Storage and Retention

On your device: history, presets, Relay conversations and voice recordings stay until you delete them or delete the app. The downloaded model stays until you delete it in Settings or delete the app.
Cloud text: we don’t store it.
Credit account and sign-ins: kept so your balance and purchases stay valid. If you are signed in, delete them in Settings ▸ Account ▸ Delete Account; otherwise email us. Any remaining credits are lost, and Pro and other purchases stay with your Apple Account and can be restored.
Feedback: kept as long as needed to handle your report. Email us to have it deleted.

Your Choices

Keep everything on your device: leave the engine on LingoAI Model or Apple. Cloud is never used unless you select it.
Model download: you can skip it and use the Apple engine for the languages it supports, or pause or delete the model in Settings ▸ LingoAI Model.
Account: stay signed out and use every feature without an account, sign out at any time, or delete your account in Settings ▸ Account.
Keyboard: turn Full Access on or off, or remove the keyboard, in Settings ▸ General ▸ Keyboard ▸ Keyboards.
Permissions: manage microphone, speech recognition, camera and photo access in iOS Settings.
Ads: buy Pro or Remove Ads, change your ad consent where offered, or limit ad tracking in iOS Settings.
Your data: delete translations from History, clear Relay conversations, or delete the app to remove everything stored on your device.

Children’s Privacy

The app is not directed to children under 13, and we do not knowingly collect personal data from children.

International Users

Our servers run on Cloudflare’s global network, and AI model providers may process Cloud requests in other countries, such as the United States, the European Union, Singapore or China, depending on the provider. Hugging Face and ModelScope may handle model download requests in other countries; ModelScope, which the app uses first in mainland China, operates from China. On-device translation does not transfer your text anywhere.

Changes to This Policy

We may update this policy. Changes are reflected by the “Last updated” date above.

Contact

For privacy questions or deletion requests, email [email protected].

Legal & Attribution

The LingoAI Model is based on Tencent Hy-MT2-1.8B, licensed under the Apache License, Version 2.0. Copyright © 2026 Tencent. Tencent is not affiliated with, associated with, sponsoring, or endorsing LingoAI.