Comparison

Lumi AI vs Eris.

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

Head to head
About

Lumi AI

This AI companion operates entirely on your device, ensuring privacy and offline functionality. Customize its personality and engage in conversations, even sharing documents and photos for deeper understanding. It's designed for personal use and runs on powerful hardware.

Highlights
  • On-device AI companion
  • Offline chat functionality
  • Customizable AI personality
  • Voice mode conversations
  • Photo and document sharing
  • Runs on Gemma 4
Features
Read full description

Looking for a more personal AI companion you can actually keep with you? Lumi is a private, on-device AI companion built to work right from your pocket. Chat without relying on the cloud, shape Lumi’s personality to fit you, and enjoy conversations that stay on your device. With Lumi, you can: Chat with a personalized AI companion Use Lumi offline when Wi-Fi or service is unavailable Keep your conversations private and on-device Choose a personality or create your own custom one Talk with Lumi in a dedicated voice mode Share photos and documents for Lumi to understand Lumi now runs on Gemma 4, making it much more capable, more natural to talk to, and more useful for everyday conversation. Because Lumi runs locally, it needs serious power under the hood. Lumi is a large download and requires a device with 6GB or more of RAM. Supported devices include: iPhone 12 Pro or later iPhone 14 or later iPhone 17 or later unlocks the more powerful Ascended Lumi iPad and Apple Vision Pro are supported too This major update for Lumi makes a big step toward making it feel truly useful every day. More improvements are on the way as Lumi becomes more agentic, and I’d love to hear how it works for you. ~ Matt

About

Eris.

Experience private AI conversations entirely on your device. This app offers offline access to multiple AI models, ensuring your data never leaves your iPhone or iPad. Enjoy fast, secure AI assistance without internet connectivity or subscriptions.

Highlights
  • 100% Private conversations
  • No internet required
  • Multiple AI models supported
  • Optimized for Apple Silicon
  • One-time download, use forever
  • Dark Mode support
  • Haptic feedback
Features
Read full description

Eris brings the power of AI conversation to your iPhone and iPad while keeping your privacy intact. Unlike cloud-based AI assistants, Eris runs entirely on your device using Apple's cutting-edge MLX framework. KEY FEATURES: • 100% Private - All conversations stay on your device • No Internet Required - Chat with AI completely offline • Multiple AI Models - Choose from Llama, Qwen, DeepSeek, and more • Lightning Fast - Optimized for Apple Silicon performance • No Subscriptions - One-time download, use forever • Dark Mode Support - Easy on your eyes • Haptic Feedback - Tactile responses for better interaction SUPPORTED MODELS: • Llama 3.2 (1B, 3B) - Meta's efficient language models • Qwen 2.5 Series - Multilingual capabilities • DeepSeek R1 - Advanced reasoning • Gemma 2, Phi 3.5, Mistral - Various specialized models • Code Models - For programming assistance PRIVACY FIRST: Your conversations never leave your device. No cloud servers, no data collection, no tracking. What you say to Eris stays with Eris. REQUIREMENTS: • iPhone XS/XR or newer (A12 chip required) • iOS 17.6 or later • 2-8GB storage per model Perfect for users who want AI assistance without compromising privacy. Whether you're brainstorming ideas, getting help with code, or just having a conversation, Eris is your private AI companion. Note: First launch includes a one-time model download. Models are stored locally for offline use.

Screenshots

Lumi AI4 screens
Eris.4 screens

Verdict

The call

The clearest difference is rating: Lumi AI at 4.2 against Eris.'s 3.4. On price, ratings volume, update cadence and ads 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

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Lumi AI holds the better App Store score, 4.2 against 3.4. Both are backed by a comparable volume of ratings — 5 and 10 respectively.

UpkeepUpdate frequency

Lumi AI ships an update every 3 weeks, Eris. every 2 weeks. Both last shipped on October 24, 2026.

Scorecard1 real difference · 9 level
Lumi AI versus Eris.: the parameters behind the verdict, then further details
ParameterLumi AIEris.
PriceFreeFree
Rating4.2 (5 ratings) — better3.4 (10 ratings)
Positive reviews—80.0% of reviews
Number of ratings510 — better
Update frequencyEvery 3 weeksEvery 2 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPadiPhone, iPad
Requires iOS18.417.6 — better
Further details — not scored
Size2.5 GB34 MB
Age rating9+4+
DeveloperMatt KrussowIgnacio Palacio

Customer experience

Lumi AI

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Eris.

All ratings6 ratings
Positive83.3%
Neutral0.0%
Negative16.7%
Written reviews5 reviews
Positive80.0%
Neutral0.0%
Negative20.0%

In-app purchases

None

Lumi AI

No in-app purchases

None

Eris.

No in-app purchases

Questions

Is Lumi AI free?
Lumi AI is free to download, with no in-app purchases.
Is Eris. free?
Eris. is free to download, with no in-app purchases.
Which has better reviews, Lumi AI or Eris.?
Lumi AI is rated higher. Lumi AI averages 4.2 out of 5 from 5 ratings, while Eris. averages 3.4 from 10 ratings.
Do Lumi AI or Eris. have ads?
Neither Lumi AI nor Eris. shows ads.
Which is updated more often, Lumi AI or Eris.?
Lumi AI ships an update every 3 weeks, and Eris. every 2 weeks. Most recently, Lumi AI was updated on October 24, 2026 and Eris. on October 24, 2026.

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