Your conversations stay on your phone

Effective date: March 24, 2026  ·  Last updated: March 31, 2026

This Privacy Policy describes how PlusOne and its operator collect, use, and handle information when you use the PlusOne iOS app and the chatplusone.com website. By using PlusOne, you agree to this policy. If you don't agree, please don't use the app.

1. What PlusOne does not collect

Let's be direct about what we don't do, because it's the most important part:

• We do not collect your conversation content. The text you type into PlusOne and the AI's responses are processed entirely on your device by a locally running language model. None of that content is transmitted to our servers.
• We do not collect image generation inputs or outputs. When you ask PlusOne to generate an image, the prompt and the resulting image are generated on your device. Nothing is sent to us or any image processing service we operate.
• We do not require an account. We have no user accounts, no login, no email list. We have no way to associate your app usage with your identity unless you reach out to us directly.
• We do not track you across apps or websites. PlusOne does not use third-party advertising SDKs or cross-app trackers.

2. How the on-device model works

When you first launch PlusOne, the app downloads an open-source language model (~1.5–2 GB) to your device over Wi-Fi. This download is the only time the core AI functionality requires a network connection. After that:

• The model weights are stored in the app's private local storage on your iPhone.
• When you send a message, it is passed directly to the model running in your device's RAM — no network call is made.
• The model generates a response on your device (using Apple's Neural Engine and processor).
• Responses are displayed in the app and stored locally.

The same applies to image generation: the Stable Diffusion model runs in RAM on your device and generates images locally without any server communication.

3. Where conversation history is stored

Your conversation history is stored in the app's private sandboxed storage on your iPhone. This is the standard iOS app container that only PlusOne can access. It is not:

• Uploaded to any server we operate
• Synced to our cloud
• Accessible to other apps on your phone

If you have iCloud device backup enabled in your iOS Settings, Apple may back up app data (including PlusOne's local storage) to iCloud as part of your overall device backup, according to Apple's own privacy policy. This is controlled entirely by your iOS settings — PlusOne does not initiate or control iCloud syncing.

4. What happens when you delete the app

When you uninstall PlusOne from your iPhone, iOS deletes all of the app's private data — including your entire conversation history, downloaded model files, and any locally generated images you haven't saved to your photo library. There is no server-side backup. There is no account to log back into. Deletion is permanent.

5. Subscription management (RevenueCat)

PlusOne offers optional paid features via in-app subscription. Subscriptions are processed by Apple, and we use RevenueCat to manage subscription entitlements (i.e., to know whether you have an active subscription so we can unlock features).

RevenueCat receives the minimum information needed for this purpose: a pseudonymous app-user identifier, your subscription status and tier, and renewal events from Apple. RevenueCat does not receive your conversation content, image generation data, or any personal information beyond what's needed for subscription validation.

RevenueCat's own privacy policy applies to the data they process: revenuecat.com/privacy

Payment card data and Apple ID information are handled entirely by Apple and never pass through PlusOne or RevenueCat. Apple's privacy policy governs those transactions.

6. Technical and diagnostic data

Like most apps, PlusOne may collect limited technical data to help us understand crashes and improve performance. This may include:

• Device model and iOS version
• App version
• Crash reports and stack traces (if you haven't opted out of sharing diagnostic data with developers in iOS Settings)
• Aggregate performance signals (e.g., model load times)

This data does not include the content of your conversations or image generation requests. Crash reports are collected through Apple's standard crash reporting infrastructure, subject to your iOS diagnostic sharing settings.

7. The chatplusone.com website

The chatplusone.com website is a simple static site. We do not operate user accounts on the website, run behavioral tracking pixels, or collect form submissions beyond what you explicitly send us. Standard web server logs (IP address, browser type, page visited, timestamp) may be retained for a short period for security and operational purposes.

8. Support communications

If you contact us at privacy@chatplusone.com, we will process your email address and the contents of your message in order to respond. We keep support communications for a reasonable period to help with follow-up questions. We do not share your support communications with third parties except as required by law.

9. Children's privacy

PlusOne is not directed at children under 13. We do not knowingly collect personal information from children. If you believe a child has provided us with personal information, contact us and we will delete it.

10. Your rights and choices

Because PlusOne does not collect or store your conversation data on our servers, most data rights requests (access, deletion, export) are simply satisfied by your control over your own device. You can:

• Delete all conversation data by deleting the app
• Manage iCloud backup behavior in iOS Settings → [Your name] → iCloud → iCloud Backup
• Opt out of sharing diagnostic data with developers in iOS Settings → Privacy & Security → Analytics & Improvements

Depending on your jurisdiction (California, EU, UK, etc.), you may have additional rights regarding any personal data we do hold (primarily support communications and any subscription-related pseudonymous identifiers). Contact us at the address below to exercise those rights.

11. Data security

We implement reasonable technical and organizational measures to protect the limited data we handle. Your conversation data is never transmitted off your device, which is the strongest security posture we could adopt. For subscription and support data, we rely on industry-standard security practices.

12. Changes to this policy

We may update this policy from time to time. When we do, we'll update the "Last updated" date above. Material changes will be noted in the app or on this page. Your continued use of PlusOne after changes become effective constitutes acceptance of the revised policy.

13. Contact

For privacy questions, to exercise your rights, or to report a concern, please start with our Contact Us page. Privacy: privacy@chatplusone.com.

END OF PRIVACY POLICY