Comparison

On‑Device AI vs fullmoon

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

Head to head
About

On‑Device AI

Transform your device into a private AI assistant for meetings and complex tasks. Features include speaker diarization, live transcription, and specialized subagents for research, analysis, and writing. Control your AI via messaging apps, with options for 100% offline processing or cloud connectivity.

Highlights
  • Speaker Diarization for meeting transcripts
  • Real-time live transcription
  • Natural AI speech generation
  • Deploy specialized AI subagents
  • AI-powered web browser automation
  • Control AI via messaging apps
  • 100% offline processing option
Read full description

On-Device AI puts chat, listening, transcription, notes, and research in one private app for iPhone, iPad, Mac, and Apple Vision Pro. Your data stays on your device. Download a model once and keep working on a plane, on the subway, or without a signal. Chats, documents, recordings, and notes stay on your device. Online providers and web features are optional and work only after you enable them. ONE APP, YOUR WAY Open every workspace from a customizable Menu. Keep favorites under Pinned and everything else close by under Available. AI CHAT Chat with local or cloud models. • Run local models from families such as Gemma, Qwen, DeepSeek, and Mistral, or connect your own provider account • Browse, download, and manage models that fit your device, including ones for text, vision, reasoning, and tools • Drop in documents, images, and scanned PDFs; approve private on-device OCR only when a PDF needs it • Fork any conversation and compare several models on the same prompt • Let the model use tools for calculations, web requests, documents, Calendar, and Reminders, and review proposed changes before they apply • Create reusable Agent Profiles, then add AI Skills, MCP servers, and tools from one clearer Agent Workflows setup • Keep facts you repeat often in Global Memory LISTEN LIBRARY AND RSS FEEDS Read less, listen more. • Turn PDFs, Markdown, plain text, web articles, and scanned books into a listening queue • Scan photographed pages, correct the OCR the app runs on device, and keep each page with its spoken text • Follow sites through RSS, Atom, and JSON feeds, then send articles to Up Next • Choose Apple voices or local neural voices, follow along in the reader, and set a sleep timer VOICE NOTE, VOICE TYPING, AND TEXT TO SPEECH Speak instead of typing, and listen instead of reading. • Record and transcribe meetings, lectures, interviews, and quick ideas • Dictate with Voice Typing on Mac or the voice keyboard on iPhone and iPad • Transcribe with Apple Speech, Whisper, Parakeet, Nemotron, Qwen3-ASR, MOSS, and other engines • Turn text, or text captured from a photo, into audio with Apple voices, Kokoro, Supertonic, VoxCPM2, IndexTTS2, and other engines • Export transcripts as text, subtitles, or Markdown AI SEARCH AND AI BROWSER Research with a second pair of hands. • Search the web in a conversation and let the model read the results for you • Browse with tabs, profiles, history, and downloads, then ask your model to read, assist, or act on the page • Hand a task to the browser agent, watch each step, and take over whenever you want KNOWLEDGE AND TEXT NOTE Give your AI your own material to work from. • Add PDFs, text, Markdown, code, images, and website content to a private searchable library • Write and edit Markdown notes in the app • Import AI chats, voice notes, Text to Speech items, and AI Search results • Tune retrieval and index edited content again APP HELP Ask how a feature or setting works. App Help answers from a guide that ships inside the app, keeps help out of your saved chats, and points to the right settings. MADE FOR APPLE DEVICES • Native layouts adapt from focused navigation on iPhone to category sidebars on larger screens • Settings are grouped by purpose, including Voice Typing, Agent Workflows, Models & Storage, Privacy & Data, Memory, and—on Mac—Instant Messaging • Widgets for Listen, Voice Note, Text Note, and Quick Actions • Siri, Apple Shortcuts, App Intents, the Mac menu bar, and keyboard shortcuts you can customize • Apple hardware acceleration for supported local models • Browse chat, transcription, speech, and embedding models in one Model Library • Store models internally, on an external drive, or on a shared volume, with separate tools for cleanup and recovery • Interface in English, Dutch, French, German, Italian, Japanese, Spanish, Portuguese, and Traditional Chinese EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

fullmoon

This app provides a private and offline way to interact with local large language models. It runs models directly on your device, optimized for Apple silicon, and is available across multiple Apple platforms. Personalize your experience and integrate with other apps via Shortcuts.

Highlights
  • Private LLM chat
  • Fully offline operation
  • On-device model execution
  • Cross-platform Apple support
  • Customizable themes and fonts
  • Shortcut integration
Read full description

the simplest way to use private LLMs: works fully offline and private when you don’t have internet. runs models on-device optimized for Apple silicon. works on every platform: iOS, iPadOS, macOS, visionOS personalize: adjust the theme, fonts, and system prompt in the app. Shortcut: chat with fullmoon or get an output from a local model to use with other actions. free, open source, private.

Screenshots

On‑Device AI4 screens
fullmoon4 screens

Verdict

The call

The clearest difference is in-app purchases: fullmoon at none against On‑Device AI's 4. fullmoon also leads on review sentiment (78% vs 64%). On price, rating, ratings volume and update cadence 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. On‑Device AI sells 4 in-app purchases, starting at $3.99 per month. fullmoon asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.4 for On‑Device AI against 4.4 for fullmoon. Both are backed by a comparable volume of ratings — 162 and 100 respectively. Written reviews are what separate them: 64% of On‑Device AI's written reviews are positive against 78% of fullmoon's.

UpkeepUpdate frequency

On‑Device AI ships an update every 2 weeks, fullmoon every 10 days. The most recent releases landed on September 22, 2026 and August 11, 2026 respectively.

Scorecard3 real differences · 7 level
On‑Device AI versus fullmoon: the parameters behind the verdict, then further details
ParameterOn‑Device AIfullmoon
PriceFreeFree
Rating4.4 (162 ratings)4.4 (100 ratings)
Positive reviews63.6% of reviews77.8% of reviews — better
Number of ratings162 — better100
Update frequencyEvery 2 weeksEvery 10 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, Mac, Vision ProiPhone, iPad, Mac, Vision Pro
Requires iOS18.017.6 — better
Further details — not scored
Size1.8 GB30 MB
Age rating17+17+
DeveloperZijie DengMainframe Computer, Inc.

Customer experience

On‑Device AI

All ratings162 ratings
Positive82.1%
Neutral8.0%
Negative9.9%
Written reviews107 reviews
Positive63.6%
Neutral15.9%
Negative20.6%

fullmoon

All ratings100 ratings
Positive86.0%
Neutral3.0%
Negative11.0%
Written reviews81 reviews
Positive77.8%
Neutral4.9%
Negative17.3%

User reviews

On‑Device AI

From 162 App Store ratings

What we love

  • 🚀 Game-changing AI assistant
  • 🔍 Powerful search functionality
  • 👍 Customizable and versatile
  • 🌐 Seamless multi-device experience
  • 💡 Innovative character-based interactions

Room to improve

  • 🐛 Crashes on larger models
  • 🔋 Heating issues on some devices
  • 🔍 Slow and unreliable web search
  • 💻 Buggy on macOS

fullmoon

From 100 App Store ratings

What we love

  • 🚀 Fast and efficient
  • 🔒 Offline usage
  • 👍 Clean and polished interface
  • 👍 Works on older devices
  • 👍 Friendly for less tech-savvy users

Room to improve

  • 🐛 Compatibility issues
  • 🐛 Downloading/installing models can be slow
  • 🐛 Responses can be inaccurate or incomplete
  • 🐛 App crashes when using certain features

Bugs and requests

On‑Device AI

Reported bugs

3 issues
  • Crashes on startup
  • Model selection issues
  • Inability to copy generated text

Requested features

9 requests
  • Automated multi-character conversations
  • Character set saving and syncing
  • Streamlined search integration
  • UI optimization for icons
  • Remote endpoint support for multi-agents
Show 4 more
  • HomeKit integration
  • Improved documentation
  • Enlarged agent input window
  • Per-agent model assignment

fullmoon

Reported bugs

2 issues
  • Incompatibility with iPhone SE2 and iPad Pro Gen3 despite supporting Metal 3
  • Deepseek models not working on some devices

Requested features

6 requests
  • Add support for saving/copying full chat conversations
  • Expand functionality through Shortcuts integration
  • Provide more advanced language models
  • Allow users to remove/delete downloaded models
  • Add support for attaching files and images
Show 1 more
  • Implement voice mode and customizable AI models

In-app purchases

4 purchases

On‑Device AI

Subscriptions2
  • Pro Member Subscription$3.991 Month
  • Pro Member Subscription$34.991 Year
One-time2
  • Lifetime Pro Member$49.99
  • Lifetime Pro Member$99.99
None

fullmoon

No in-app purchases

Questions

Is On‑Device AI free?
On‑Device AI is free to download, with in-app purchases available.
Is fullmoon free?
fullmoon is free to download, with no in-app purchases.
Which has better reviews, On‑Device AI or fullmoon?
On‑Device AI and fullmoon are both rated 4.4 out of 5 on the App Store, from 162 and 100 ratings respectively.
Do On‑Device AI or fullmoon have ads?
Neither On‑Device AI nor fullmoon shows ads.
Which is updated more often, On‑Device AI or fullmoon?
On‑Device AI ships an update every 2 weeks, and fullmoon every 10 days. Most recently, On‑Device AI was updated on September 22, 2026 and fullmoon on August 11, 2026.

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