Private AI Chat Apps

Kindroid's legal page (effective October 6, 2026) is the most specific in this group. It says chats and other sensitive data are encrypted at rest and in transit, and states plainly that "Kindroid is not end-to-end encrypted". Support staff "cannot browse your chats"; authorized staff may see only excerpts flagged by automated safety systems, and Trust and Safety opens flagged context only when you appeal a lock and consent. Production access is limited to a small group of engineers.

Chats stay until you delete a Kindroid or your account, and a self-serve export runs every 30 days from Profile, Preferences, Account privacy. The policy says "We will not sell or share your Personal Data", and its Yoti age check passes back only a pass or fail. Gaps: the policy does not say whether chats train its models, and the App Store label lists a user ID and product interaction as used to track you. More in our Kindroid review.

Skip it if you want a free plan (none since October 1, 2026) or a written answer on training.

Nomi's US App Store label has no "Data Used to Track You" section at all, which Surfshark's 2025 and 2026 studies also singled out. Its policy says it uses session cookies only, does not currently use advertising networks, and "We do not and will not sell or rent to any third party any of your personal information". Sign-in is Google or Apple only, and Apple's Hide My Email relay works.

Deletion is clear: Profile, Account Settings, Delete account, then type DELETE. Personal information is removed "within 28 or so days", with only unattributable training archives, support emails and legal records kept. The gaps are training (aggregated, anonymised chat data improves the AI, with no opt-out), encryption (only "not end-to-end" is stated) and staff access (not addressed). See our Nomi review.

Skip it if you need a chat export or written limits on who can read your messages.

Nastia AI (Nastia Cybernetics, France) has the cleanest deletion rules among the adult platforms. Settings, Account, Danger zone deletes everything at once and immediately: companions, chats, images, videos, settings and remaining tokens. Single chats and media can be deleted any time. The policy then lists what survives and why: payment records for tax law, records of rule violations (up to 7 years), cancellation answers, and backups that are overwritten on a regular cycle.

Where the law requires age checks, an outside provider returns only a pass or fail, and Nastia does not receive your ID or face image. The policy says "we do not sell your personal information" and states encryption in transit. It is vaguer on training ("the quality of companion replies") and silent on staff reading ordinary chats, and services are hosted in the US. Our Nastia AI review covers the rest.

Skip it if you want a store app; and type nastia.ai yourself, because nastia.app redirects elsewhere.

Replika's May 2026 privacy policy gives real numbers: messages and content are kept up to 60 days after your contract ends, account and financial records at least 10 years, and anonymised analysis data is deleted within a year. Training is limited to its own safety algorithms and chatbot performance; outside language model providers are contractually barred from training on your data, and an erasure request reaches them too. The help center says no humans read your messages.

The downsides are real. Conversation data now goes to unnamed third-party AI providers, while the store listings still say conversations are "not shared with any third parties". Encryption is stated for transit only, the App Store label lists advertising data used to track you, you cannot delete chat history without deleting the account, and Italy fined its developer EUR 5 million in 2025. Read the Replika review.

Skip it if you object to outside AI companies processing your chats.

Character.AI is the only app here with a switch to stop your chats training its models: untick "Improve the Model for Everyone" in data settings. Its help article describes it for EEA and UK users and a July 2026 summary says users can opt out at any time; it does not cover search, recommendations or safety classifiers. It also offers a self-serve data export and account deletion, and its age-check partner Persona deletes biometric data and IDs within 7 days.

Everything else counts against it: moderators can review flagged content, the App Store label lists location, contact info, identifiers and usage data for tracking, and there is no fixed retention period. Above all, the company filed for Chapter 11 on October 12, 2026 to sell itself, and its policy allows data to pass to a buyer. Forty attorneys general have asked the court to let users delete data first. See our Chapter 11 explainer.

Skip it if you want adult content (not allowed) or certainty about who will hold your data next year.

Janitor AI's US App Store label lists every data type as "not linked to you" and nothing as used to track you, and its Google Play label says no data is shared with third parties. The Safety page adds: "We never sell your personal data or share private conversations with third parties for advertising or commercial purposes." Deletion sits under Settings, Security, Delete account (with an emailed code), and k-ID age checks return only a yes or no.

The policy leaves important gaps: whether chats train its own model, whether staff can open private chats, and how long data is kept. Deleted accounts may keep your email and sign-in metadata. And if you connect an outside model through an API proxy or the Router, your chats go to that provider under its own rules. Our Janitor AI review explains the model options.

Skip it if you plan to use an external model and want one privacy policy to cover everything.

Romantic AI's September 2026 Content Management Policy says "We do not continuously review all interactions in real time" and lists the only situations in which a moderator looks: a user report or removal request, an appeal, a notice from a rights holder, payment partner, regulator or police, or an ambiguous case. Deleting your account removes your data permanently, personal data is deleted "without undue delay", and the policy says "We do not sell personal data".

Against that: anonymised chat data is used to train its models with no opt-out, the App Store label lists contact info as used to track you, and its Google Play label says some data may be shared with third parties. Mozilla's 2024 review counted 24,354 trackers in one minute of its Android app, though that predates the current policy. More in the Romantic AI review.

Skip it if you want your chats kept out of training.