Where Do Your AI Companion Conversations Actually Go?

Where Do Your AI Companion Conversations Actually Go? 🔐

People tell AI companions things they would not tell a search engine. That makes the privacy question different from most apps — not more paranoid, just more consequential.

The confusing part is that two very different claims sound almost identical:

• "Rendered on your device" — the character's animation is computed locally.
• "Stays on your device" — your conversations never leave.

The first is common. The second is rarer, because it is harder to build and it costs you something. Understanding the difference tells you most of what you need to know.

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🧠 Why Most Companions Still Send Your Words Away

A convincing companion needs a capable language model behind it. The usual way to get one is to run it on a server, where size is not a problem, and send your messages to it.

So in most apps the work splits like this:

That last row is what lets those apps restore your history on a new phone: yesterday was stored somewhere that survives deleting the app.

Keeping the conversation on the phone is possible. It means a language model small enough to run on the device at conversational speed, while the device also renders a 3D character in real time. And it has a price beyond engineering: the model is a large download, and with no copy on a server there is nothing to restore from if you lose the phone.

Where the conversation lives decides both your privacy and what you can get back. That trade is worth making knowingly rather than by accident.

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❓ Five Questions Worth Asking

Before you get attached to any companion app, the answers should be findable:

1. Is conversation processing local or remote? If the marketing says "on-device" but is vague about what is on-device, assume it is the rendering. A simple test: does a whole conversation still work in Airplane Mode?
2. Is history tied to an account? If it survives reinstalling the app or appears on a second device, it is stored server-side. That is not sinister — but it is a fact worth knowing.
3. Can you delete it? Look for account deletion, not just "clear chat". Clearing a view is not the same as removing data.
4. Who is the model provider? Some apps use a third-party model, which adds another party to the chain.
5. Is any of it used for training? This should be answerable from the privacy policy. If it is not addressed at all, treat that as an answer.

If an app cannot answer these from its own documentation, that is information too.

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🎭 How AniSoul and RealSoul Work

Being direct about our own apps, since the point of this post is that vagueness is the problem. Here are our answers to the five questions.

1. Local. In AniSoul and RealSoul, her language model, her synthesised voice and her lip-sync all run on your iPhone or iPad, and speech recognition uses Apple's on-device recogniser. Once her model is in place, a whole conversation works in Airplane Mode.
2. There is no account. No sign-up, no email, nothing to log into. Your conversations and her memories stay on the device that had them.
3. Deleting the app removes them from your phone. There is no copy on our servers, so there is nothing for us to delete on your behalf.
4. No third-party cloud AI. Your messages, your microphone audio, your prompts and her memories never leave the device, to us or to anyone else.
5. Training. We never receive your conversations, so there is nothing of yours for us to train on.

The apps do send three things, all to our own servers: a device identifier provided by iOS and a count of messages sent, to meter the daily free messages, and your App Store receipt once you subscribe. None of it is sold or used for advertising or cross-app tracking. The details are in the privacy policy.

The cost is the one described above. Her model is a download of roughly 400 MB to 1 GB, and if you delete the app or move to a new phone, your conversations and her memories do not come with you. Restore Purchases brings back a subscription, through your Apple Account, not memories.

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🛡️ Practical Habits

Regardless of which app you choose:

• Treat a companion like a cloud service unless you have checked it is not. Anything you would not put in an email to a stranger deserves a pause in an app that sends your words to a server. The Airplane Mode test above takes a minute.
• Be careful with identifying details. Full name, address, workplace, financial information — an AI companion has no reason to need any of it, wherever it runs.
• Remember who else can open your phone. When the conversation lives on the device, the device is what protects it. A passcode does more here than any setting in the app.
• Know your deletion path before you need it. For an app with an account, find the account deletion control while you are calm, not while you are upset. For one without, it is the app itself.

None of this is about avoiding these apps. It is about using them with an accurate picture of where the words go.

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💬 The Honest Summary

Most AI companions give you local rendering and keep the conversation on a server, which is what lets them restore your history anywhere. A companion can also keep the whole conversation on your phone, as AniSoul and RealSoul do, at the price of a large model download and nothing to restore from.

Neither is wrong. What is wrong is an app that says "on your device" and leaves you to guess which part it means.

Knowing which is which is the whole difference between an informed choice and an assumption.

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Read more: AniSoul guide · RealSoul guide · what real-time rendering actually costs