Where Do Your AI Companion Conversations Actually Go?
"Runs on your device" and "stays on your device" are different claims. Here is how to tell what an AI companion app really does with your conversations, and what questions to ask before you get attached.
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 rare, and for good reason. Understanding the difference tells you most of what you need to know.
🧠 Why Almost Nothing Runs Entirely Locally
A convincing companion needs a capable language model behind it. Models that hold a personality across a long conversation are large — too large to run on a phone at conversational speed while also rendering a 3D character in real time.
So in practice the work splits:
| What happens where | Typically |
|---|---|
| Character rendering, animation, lip sync | On your device |
| Voice synthesis | Varies |
| Understanding and replying | On servers |
| Conversation history | On servers, tied to your account |
That last row is what makes a companion feel continuous — she remembers yesterday because yesterday was stored somewhere that survives closing the app.
The feature you want and the data flow you might not want are the same mechanism. That trade is worth making knowingly rather than by accident.
❓ Five Questions Worth Asking
Before you get attached to any companion app, the answers should be findable:
- 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.
- 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.
- Can you delete it? Look for account deletion, not just "clear chat". Clearing a view is not the same as removing data.
- Who is the model provider? Some apps use a third-party model, which adds another party to the chain.
- 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.
🎭 How AniSoul and RealSoul Work
Being direct about our own apps, since the point of this post is that vagueness is the problem.
AniSoul and RealSoul render the character locally — that is why the animation responds the instant you speak, and why sustained use warms your device. That part genuinely is on your phone.
Conversations are processed by services, not entirely on the handset. Your companion and your history are tied to your account, which is what carries them across sessions and devices. We say this plainly in the documentation rather than leaving "runs on your device" to imply something broader.
What is collected and how it is handled is in the privacy policy. Read it before sharing anything sensitive — with these apps or any others.
🛡️ Practical Habits
Regardless of which app you choose:
- Treat it like a cloud service, because it is one. Anything you would not put in an email to a stranger deserves a pause.
- Be careful with identifying details. Full name, address, workplace, financial information — an AI companion has no reason to need any of it.
- Know your deletion path before you need it. Find the account deletion control while you are calm, not while you are upset.
- Use a separate account if it matters to you. Nothing stops you from keeping this identity separate from your primary one.
None of this is about avoiding these apps. It is about using them with an accurate picture of where the words go.
💬 The Honest Summary
A real-time 3D companion gives you local rendering, genuine responsiveness, and a character that persists across days. What it does not give you — and what essentially no app in this category gives you today — is a system where your conversations never leave the phone.
Apps that imply otherwise are usually being imprecise about which part is local.
Knowing which is which is the whole difference between an informed choice and an assumption.
Read more: AniSoul guide · RealSoul guide · what real-time rendering actually costs
Practices differ between apps and change between versions. A current privacy policy is authoritative — including ours.