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35 characters run entirely on your iPhone—roleplay even offline
Visit Official WebsiteProduct Type
Software
Platform
Apple
Languages
English
Regions
Global
Pricing
Freemium
Price
Free to download with in-app purchases (Pro / Mature mode, etc.); the on-device model requires a one-time ~2 GB download.
Free Trial
✓ Trial Available
Free to roleplay with 35 characters and 127 scenarios; advanced features like Mature (18+) mode unlock via in-app purchases.
Last updated 2026-10-30· Content established
Data may be delayed — always check the official website for the latest info.
Visit Official WebsiteAbout This Tool
Castmates is a privacy- and offline-first AI roleplay app: 35 hand-crafted characters (a detective, a vampire countess, a pirate captain and more) live on your iPhone, and conversations are generated and stored entirely on-device—they never leave your phone. Flow: install from the App Store and download the on-device model once (~2 GB) → pick or build a character and drop into one of 127 built-in scenarios (or write your own opening) → start roleplaying; characters act and narrate, stay in character, and remember your prior story. Highlights include fully on-device, no account, works offline (subway, flight), custom characters (persona, avatar, tone, tags), and an optional Mature (18+) mode. Developed by JOSIP MARKOVIC, launched on iOS in Jul 2026, rated 17+.
Background
Developed by JOSIP MARKOVIC and launched on iOS in Jul 2026, positioned as fully on-device, offline-playable AI roleplay.
Technology
The AI model runs entirely on-device on iPhone; generation and storage never leave the device. Offers 35 hand-crafted characters, 127 scenarios and custom characters; optional Mature mode. Specific on-device model not disclosed.
Market
Launched Jul 2026, rated 17+, with a 4.2 store rating across 5 reviews—a small but positively rated early product; no public download figure.
Best For
Privacy-minded users who want offline roleplayPlayers who like many characters and genresCreators who want to build their own characters and scenes
Editorial Note
Fully on-device + offline + privacy is a clear differentiator, suiting roleplay players who want data to stay on device; downsides are iOS-only, a sizable one-time model download and a small rating sample.
Strengths
- + Fully on-device, chats never leave phone
- + Offline roleplay (subway / flight)
- + 35 characters, 127 scenarios, custom builds
Drawbacks
- − iOS-only
- − One-time ~2 GB on-device model download
- − Small rating sample (5 reviews)
Value Assessment：Privacy- and offline-minded multi-character roleplay fans may try it.
External Resources
FAQ
Does it cost money, and how is it priced?
Free to download with in-app purchases (Pro / Mature mode, etc.); the on-device model requires a one-time ~2 GB download. Advanced features unlock via in-app purchases.
How is my conversation data handled?
Conversations happen inside the product; exact data handling follows the official privacy policy—read it before use.
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All information on this site is for reference only. Data may be delayed — always verify on the official website. Listings are in no particular order.