Monolithos Core vs LocalBrain AI
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Monolithos Core
This app acts as a personal agent OS, connecting your knowledge, writing, and AI tasks in a local-first workspace. It helps you organize information, generate content, and manage projects with a focus on user control and data ownership.
- Local-first workspace
- Organize notes into knowledge
- AI-powered task execution
- On-device transcription and insights
- Markdown editing and file organization
- Convert documents to audio podcasts
- Create presentations from Markdown
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YOUR PERSONAL AGENT STARTS WITH MEMORY. Monolithos connects your knowledge, writing and AI work in one local-first workspace. We are building a Personal Agent OS that remembers your context, helps move work forward and keeps you in control. Your memory is the foundation. What you do with it is the point. Bring your own Markdown vault. Turn notes into knowledge, meetings into next steps, and ideas into finished work. Your files remain yours to inspect, edit and take with you. MEMORY THAT BELONGS TO YOU - Two layers: Crystals organize what you know; a personal memory layer captures your preferences, judgment and patterns. - The Mirror: inspect how AI understands you, trace traits to their sources, and adjust or remove them. - Night Watch: discover connections and proposed memories from your work. You decide what to accept. - Recall: find relevant knowledge through keyword, graph and semantic retrieval, with sources you can inspect. - Private Domain: choose folders to exclude from cloud AI context while keeping them available for your own local work. FROM IDEAS TO ACTION - Flow: run multi-step AI tasks for research, writing and finished work. Steps that require your judgment pause for approval. - Black Hole: collect material through capture tools and the iPhone share sheet, then bring it into your workspace. - Minutes: record and transcribe on-device, separate speakers after recording, review insights and save Markdown meeting archives. Turn follow-up items into AI tasks. - Synapse: use AI actions on selected text, with access to multiple model families through one interface. - Deep Research: investigate a question across multiple steps and bring the findings into a structured report. CREATE, NOT JUST CHAT - Codex: write and edit Markdown, organize files and work directly with your own material. - Prism: a four-agent presentation workflow with 126 layouts and 14 themes. Turn Markdown into decks you can refine and present. - Audio Brief: turn documents into podcast-style audio in four formats across 12 languages. - Projects: keep related material and AI work within a defined scope. LOCAL-FIRST, WITH CLEAR BOUNDARIES Your vault is stored on your device as Markdown and YAML, without a proprietary file format. It is Obsidian-compatible, supports multiple vaults, and can sync between Apple devices through iCloud. Local-first does not mean every AI operation is offline. Cloud AI processes the context needed for the tasks you request. Private Domain content is excluded from cloud AI context. Minutes audio stays on your device. Live insights send transcript text to cloud AI; turning insights off stops further live analysis. Generating a summary sends the full transcript for cloud processing. Search your files with fast, Rust-native full-text search, including Chinese, Japanese and Korean. Use the interface in English, Simplified Chinese, Traditional Chinese, Japanese or Korean. BUILT AROUND YOUR WORK For researchers, writers, founders and anyone building knowledge over time. Keep your materials, develop your thinking and put AI to work without giving up ownership of what you create. Your memory. Your decisions. Your agent. Local file management, search and Markdown editing do not require an AI subscription. AI features require a subscription. Plans and pricing are available in Settings. Terms of Use (EULA): https://monolithos.ai/terms.html Privacy Policy: https://monolithos.ai/privacy.html
LocalBrain AI
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LocalBrain AI helps you organize articles, documents, recordings and ideas into a personal knowledge base. Record or import audio and local videos in a dedicated Recordings & Transcripts tab. Audio shared from other apps opens there directly. Transcribe on your device with Whisper, listen while editing, save your changes and follow the currently playing paragraph. AI selects highlights as direct transcript excerpts with playback timestamps. Recordings and transcripts remain saved in this workspace. You can also add their content to your knowledge base through an explicit action. Chat separately, browse saved source categories and related topics, and ask questions about your knowledge base. Translate conversations using text and voice; voice availability depends on your device, language and downloaded models. AI inference runs on device. Initial model downloads, web search and external links require internet access. Supported local features work offline after model setup. Transcription, correction and translation can contain errors; review important details. Pro costs NT$90 for one calendar month or NT$990 for one calendar year. Access expires unless you choose to purchase again; there are no automatic charges. Free includes 10 chat questions and 5 text or voice translations per day, and transcription up to 10 minutes per file. Pro removes those paid limits while active; device and source limits still apply. Existing lifetime and early paid users keep permanent Pro; existing lifetime Family Sharing is preserved. App Store pricing and availability apply. Text, PDF and image knowledge imports have no paid quantity limit.
Screenshots
Verdict
The clearest difference is update cadence: LocalBrain AI at weekly against Monolithos Core's every 5 weeks. Monolithos Core's advantage is iOS requirement (17.0 vs 26.0). On price, 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
Both are free to download. Monolithos Core sells 8 in-app purchases, starting at $39.99 per month and LocalBrain AI sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
Monolithos Core ships an update every 5 weeks, LocalBrain AI weekly. The most recent releases landed on October 13, 2026 and October 29, 2026 respectively.
| Parameter | Monolithos Core | LocalBrain AI |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 5 weeks | Weekly — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | — |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 17.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 185 MB | 44 MB |
| Age rating | 17+ | 17+ |
| Developer | Monolithos,LLC | YI-HONG Lin |
In-app purchases
Monolithos Core
- THE CORE — Monthly7 Days trial$39.991 Month
- THE MAX — Monthly7 Days trial$89.991 Month
- THE CORE — Annual$349.001 Year
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- THE MAX — Annual$859.001 Year
- 1,500 Creation Credits$11.99
- MMC Memory Boost Pack$11.99
- 3,500 Creation Credits$29.99
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- 10,000 Creation Credits$79.99
LocalBrain AI
- LocalBrain Pro 1 Month$2.99
- LocalBrain Pro$19.99
- LocalBrain Pro 1 Year$29.99









