Comparison

DeepThink vs Luminary AI

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

Head to head
About

DeepThink

This AI assistant operates entirely on your device, offering private and unlimited conversations without needing an internet connection. It utilizes a self-reflection model for accurate reasoning and provides formatted output for easy use. Share with family for a secure, offline thinking partner.

Highlights
  • Complete privacy on-device processing
  • Offline functionality
  • Unlimited conversations
  • Markdown and LaTeX rendering
  • Full chat history
  • Family Sharing up to 6 members
  • AI self-reflection for thoughtful responses
Features
Read full description

Transform your device into a personal AI assistant that works completely offline. DeepThink runs entirely on your device, giving you unlimited conversations with absolute privacy – no internet required and we never transmit your messages anywhere. One purchase, unlimited access. No subscriptions, no accounts, no API keys needed. Share with up to six family members through Family Sharing. While we may transition to a subscription model in the future, anyone who purchases now will have lifetime access to the app at no additional cost. DeepThink is powered by DeepSeek R-1, a groundbreaking AI model distilled and optimized for mobile devices. R-1 represents a new generation of AI assistant that carefully performs internal self-reflection and reasoning before responding. Until recently, even leading AI services would generate answers without proper reasoning steps. This led to errors on seemingly simple questions like "Is 9.11 greater than 9.9" and "How many letter R's are in the word Strawberry". DeepThink, through R-1's methodical reasoning process, tackles these examples and much more with accuracy. Key Features: • Complete privacy – all processing happens on your device • Works offline – think with AI anywhere, anytime • Unlimited conversations – no usage limits or extra fees • Output has formatted Markdown and LaTeX rendering • Full chat history with conversation review and resume • Copy responses as rich text or Markdown • Family Sharing enabled – share with up to 6 family members • Thoughtful responses through AI self-reflection • Simple temperature controls to fine-tune responses • Advanced settings for power users While DeepThink may not beat online enterprise AI services for many uses, it excels at being your offline and private thinking partner. The rare occasions where it needs a reset are easily handled with the stop button or by adjusting temperature settings. Coming Soon to free updates: • Additional AI models • Faster performance • Editable context Like all AI systems, DeepThink may occasionally make mistakes. Users should verify important information and are responsible for how they use the AI's output. We believe in being transparent about both capabilities and limitations while delivering genuine value through private, offline AI assistance. We're passionate about making DeepThink better with each update. Your feedback and suggestions play a crucial role in shaping future versions – we read every comment and feature request. Join us in evolving DeepThink into an even more capable offline AI companion. Share your thoughts with us @3DTOPO on X (formally Twitter), through App Store reviews or support contact information. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Additional Terms of Use: Any user assumes full responsibility for any and all use of information provided by DeepThink. The app's AI-generated responses are provided "as is" without any warranties of accuracy or fitness for any particular purpose. Any user must independently verify any information provided by the app before relying on it.

About

Luminary AI

Read full description

Luminary AI is a private, on-device AI chat app. Every conversation runs locally on your iPhone using optimized machine learning models. Nothing is sent to the cloud. Choose from a curated library of compact AI models from leading open-source families including Llama, Gemma, Qwen, and more. Each model is optimized for Apple silicon, so you get fast, responsive conversations without an internet connection. KEY FEATURES • 100% On-Device: All inference runs locally. Your data stays on your phone. • Multiple Models: Browse, download, and switch between AI models to find the best fit. • No Account Required: Start chatting immediately. • Real-Time Performance: See tokens-per-second metrics and benchmark models on your hardware. • Conversation Management: Pin favorites, search across chats, and export conversations. • Device-Aware Recommendations: The app identifies which models run best on your specific iPhone. • Dark Mode: Full light and dark theme support. Luminary AI is designed for people who value privacy and want to explore what on-device AI can do without giving up their data to do it.

Screenshots

DeepThink4 screens
Luminary AI4 screens

Verdict

The call

The clearest difference is price: Luminary AI at Free against DeepThink's $2.99. DeepThink's advantage is iOS requirement (18.0 vs 26.2). On ads, in-app purchases and device support there is nothing between them.

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

CostPrice · In-app purchases · Ads · Monetization

Luminary AI is free to download; DeepThink costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Scorecard2 real differences · 7 level
DeepThink versus Luminary AI: the parameters behind the verdict, then further details
ParameterDeepThinkLuminary AI
Price$2.99Free — better
Rating3.0 (2 ratings) — better—
Number of ratings2 — better—
Update frequencyEvery 2 days—
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPad — betteriPhone
Requires iOS18.0 — better26.2
Further details — not scored
Size21 MB19 MB
Age rating+44+
Developer3DTOPO Inc.Rebecca Despoiu

In-app purchases

None

DeepThink

No in-app purchases

None

Luminary AI

No in-app purchases

Questions

Is DeepThink free?
DeepThink costs $2.99, with no in-app purchases.
Is Luminary AI free?
Luminary AI is free to download, with no in-app purchases.
Do DeepThink or Luminary AI have ads?
Neither DeepThink nor Luminary AI shows ads.

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