Comparison

Lumi AI vs Monstro X

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

Monstro X

Features
Read full description

Keep your family’s classes and fitness routines on track—without the hassle with Monstro X. Monstro X makes managing your family’s busy schedule simple and stress-free. Whether it’s gym sessions, martial arts, dance classes, swimming lessons, or other activities. Monstro X keeps everything organized in one place. With Monstro X, you can: - View and track all your family’s upcoming classes and activities. - Get reminders so no one misses a session. - Manage multiple family members easily. - Stay on top of fitness and wellness routines without juggling multiple apps or calendars. - Designed to make your life easier, so you can focus on enjoying the activities rather than managing them.

Screenshots

Lumi AI4 screens
Monstro X4 screens

Verdict

The call

The clearest difference is ads: Lumi AI at none against Monstro X's shown. Monstro X's advantage is update cadence (every 10 days vs every 3 weeks) and iOS requirement (15.1 vs 18.4). On price, 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

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

UpkeepUpdate frequency

Lumi AI ships an update every 3 weeks, Monstro X every 10 days. The most recent releases landed on October 24, 2026 and October 28, 2026 respectively.

Scorecard3 real differences · 6 level
Lumi AI versus Monstro X: the parameters behind the verdict, then further details
ParameterLumi AIMonstro X
PriceFreeFree
Rating4.2 (5 ratings) — better—
Number of ratings5 — better—
Update frequencyEvery 3 weeksEvery 10 days — better
AdsNo — betterYes
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS18.415.1 — better
Further details — not scored
Size2.5 GB75 MB
Age rating9+17+
DeveloperMatt Krussow8BITAPP LLC

In-app purchases

None

Lumi AI

No in-app purchases

None

Monstro X

No in-app purchases

Questions

Is Lumi AI free?
Lumi AI is free to download, with no in-app purchases.
Is Monstro X free?
Monstro X is free to download, with no in-app purchases.
Do Lumi AI or Monstro X have ads?
Monstro X shows ads; Lumi AI does not.
Which is updated more often, Lumi AI or Monstro X?
Lumi AI ships an update every 3 weeks, and Monstro X every 10 days. Most recently, Lumi AI was updated on October 24, 2026 and Monstro X on October 28, 2026.

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