Comparison

OThree AI vs Prysm AI

Price, ratings, monetisation and update history for both apps, side by side โ€” with what reviewers say about each.

Head to head
About

OThree AI

This AI chat application provides instant answers and assistance using advanced language models. It offers both offline and cloud-based access, prioritizing user privacy with a zero-data-storage policy. Enjoy seamless compatibility across Apple devices for a convenient AI experience.

Highlights
  • Offline Large Language Model
  • Ultra-fast Cloud LLM
  • Zero-data storage privacy
  • Universal Apple device compatibility
  • Quick answers and brainstorming
  • Drafting emails and documents
Read full description

Meet OThree AI, the AI chat app that's ready to assist you anytime, anywhere. Experience the power of cutting-edge language models right at your fingertips, completely free and with unwavering privacy. Key Features: Offline Access: No internet? No problem! OThree AI includes a local Large Language Model that works even when you're offline. Perfect for emergencies, travel, or simply when you want to stay private. Get helpful responses and information, regardless of your connection, completely free! Ultra-Fast Cloud LLM: When speed and up-to-date knowledge are crucial, OThree AI's cloud-based LLM delivers lightning-fast, intelligent responses. Stay informed with the latest information and enjoy dynamic, engaging conversations. Privacy First: Your privacy is our top priority. OThree AI is designed with a zero-data-storage policy. We never store your conversations. Chat with confidence, knowing your data remains yours. Universal Compatibility: OThree AI works seamlessly across your Apple devices. Use it on your iPhone, iPad, Mac, and even your Apple Vision Pro. OThree AI is perfect for: โ€ข Getting quick answers to your questions (offline & free with Local LLM) โ€ข Brainstorming ideas and creative writing โ€ข Drafting emails and documents โ€ข Learning new things and exploring different topics โ€ข Having engaging and informative conversations Download OThree AI today and unlock the potential of AI, with privacy and convenience at its core! Start for free with our Local LLM! Terms of Use: https://othreeai.com/eula Privacy Policy: https://othreeai.com/privacy

About

Prysm AI

Features
Read full description

Prysm AI brings the power of advanced language models directly to your Apple devices, with a focus on privacy, performance, and ease of use. KEY FEATURES: โ— Private & Secure All processing happens on-device using Apple's Foundation Models framework. Your conversations never leave your device, ensuring complete privacy. โ— Smart Conversations Engage in natural, contextual conversations with an AI that understands nuance and can help with a wide variety of tasks. โ— Creative Tools Generate structured content including recipes, travel itineraries, book summaries, and product reviews with specialized templates. โ— Adaptive Interface Beautiful, native experience optimized for iPhone, iPad, and Mac with support for light/dark modes and customizable themes. โ— No Subscription Required Core features are completely free with no ads or tracking. Optional premium features enhance your experience. โ— Examples Library Get inspired with curated prompts and templates across categories like productivity, creativity, learning, and entertainment. PERFECT FOR: โ€ข Students and educators โ€ข Writers and content creators โ€ข Developers and designers โ€ข Business professionals โ€ข Anyone curious about AI Prysm AI respects your privacy while delivering powerful AI capabilities. No account required, no data collection, just pure AI assistance when you need it. Built with SwiftUI and powered by Apple Intelligence, Prysm AI represents the future of on-device AI assistance.

Screenshots

OThree AI3 screens
Prysm AI4 screens

Verdict

The call

The clearest difference is in-app purchases: Prysm AI at none against OThree AI's 1. Prysm AI also leads on update cadence (every 2 days vs every 9 days). OThree AI's advantage is iOS requirement (18.0 vs 26.0). On price, ads and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. OThree AI sells 1 in-app purchase, starting at $14.99 per month. Prysm AI asks for nothing beyond the download.

UpkeepUpdate frequency

OThree AI ships an update every 9 days, Prysm AI every 2 days. Both last shipped on October 30, 2026.

Scorecard3 real differences ยท 5 level
OThree AI versus Prysm AI: the parameters behind the verdict, then further details
ParameterOThree AIPrysm AI
PriceFreeFree
Positive reviews0.0% of reviewsโ€”
Update frequencyEvery 9 daysEvery 2 days โ€” better
AdsNoNo
In-app purchasesYesNo โ€” better
MonetizationFreemiumโ€”
DevicesiPhone, iPad, Mac โ€” betteriPhone, iPad
Requires iOS18.0 โ€” better26.0
Further details โ€” not scored
Size1.7 GB2 MB
Age rating17+4+
DeveloperSeven Delta Seven LLCAndrew Bierman

In-app purchases

1 purchases

OThree AI

Subscriptions1
  • OThree Premium7 Days trial$14.991 Month
None

Prysm AI

No in-app purchases

Questions

Is OThree AI free?
OThree AI is free to download, with in-app purchases available.
Is Prysm AI free?
Prysm AI is free to download, with no in-app purchases.
Do OThree AI or Prysm AI have ads?
Neither OThree AI nor Prysm AI shows ads.
Which is updated more often, OThree AI or Prysm AI?
OThree AI ships an update every 9 days, and Prysm AI every 2 days. Most recently, OThree AI was updated on October 30, 2026 and Prysm AI on October 30, 2026.

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