Comparison

SigmaNote vs neoloopy

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

Head to head
About

SigmaNote

This app acts as an AI-powered knowledge hub, allowing users to capture, manage, learn from, and create knowledge across various formats. It uses AI agents to organize content, answer questions, and facilitate voice-driven writing and content creation.

Highlights
  • Capture knowledge from diverse sources
  • AI agents for organization and retrieval
  • Learn through conversation and listening
  • Voice-driven AI writing and content creation
  • Unified knowledge lifecycle management
  • Cross-format knowledge integration
Features
Read full description

SigmaNote — AI-Powered Knowledge Hub SigmaNote lets you build your own AI-powered knowledge hub — a single place to capture, manage, learn from, and create knowledge. It goes beyond notes or chat. SigmaNote gives you AI agents that work with your knowledge, across every format. Capture Knowledge from Anywhere Bring knowledge into SigmaNote from any source: • Notes and markdown documents • PDFs, files, and document scans • Images with OCR • Web pages and web archives • YouTube videos (with or without subtitles) • Voice recordings and system audio • Real-time, multi-language transcripts No format limits. Everything becomes searchable and usable. AI Agents That Organize for You SigmaNote’s AI agents help you: • Find relevant knowledge instantly • Organize content into the right Spaces • Connect related ideas across files and formats • Reduce clutter as your knowledge grows Your knowledge hub stays structured — without manual effort. Learn by Listening, Reading, and Conversation Knowledge shouldn’t just sit there. With SigmaNote, AI agents can: • Proactively read or speak knowledge to you • Explain complex topics in simple terms • Answer questions grounded in your materials • Help you think through ideas step by step It’s like discussing your knowledge with a personal tutor or teammate. Talk to Write. Build New Knowledge. SigmaNote introduces voice-driven AI writing. You can talk to an AI agent to: • Write new documents • Edit and update markdown files • Refine ideas through conversation • Create knowledge using your entire hub or a selected document This turns thinking out loud into structured writing — powered by everything you’ve learned. From Capture to Creation SigmaNote supports the full knowledge lifecycle: • Capture information • Understand it with AI • Absorb it through reading and listening • Create new knowledge by talking and writing All in one personal system. Who It’s For Students, researchers, founders, consultants, lawyers, clinicians, creators — anyone who wants to own their knowledge and build with it. Why SigmaNote • One hub for all knowledge formats • AI agents grounded in your data • Learn by conversation, not just reading • Turn knowledge into output Legal Term of services & privacy policy: https://www.signifyid.com/terms/view.html?doc=privacy_policy https://www.signifyid.com/terms/view.html?doc=term_of_service

About

neoloopy

Features
Read full description

neoloopy is a local-first tool for systems thinking. Map any system as a causal-loop diagram, let neoloopy find the feedback loops that drive it, grow a Graph: a system map that holds your ideas next to live references to your models, variables, loops, and concepts — and model a process as a Petri net and keep every run as evidence. PROCESSES — PETRI NETS (PRO) • Draw a process on the canvas: places hold tokens, transitions fire, arcs connect them. • Check a draft's health before you run it. Missing data, disconnected elements and undocumented meanings are listed; the draft tells you when it is executable. • Step the process and keep the run. Every run is immutable, pinned to the exact source revision it ran from, and replays the same way every time. • Document each element's meaning in Process Docs, right next to the drawing. • Export a process with its saved source, runs and analyses, and import it elsewhere with an explicit identity decision — create, replace or duplicate. • Part of Pro; included for everyone during the launch period. What you build stays free to open and replay. GRAPH — YOUR SYSTEM MAP • Put an idea on the canvas and link it to the real thing: a model, a variable, a loop, a concept from your vault. References stay live, so the map is never a stale drawing of your thinking. • Focus on one node and the map re-centers around it. A +N badge counts its hidden relations — tap to bring them in, tap again to prune. • Search the structure. The board lists every node and relation with search and filters, so a hundred-node map is still navigable on a phone. • Plain files. Every graph is a Markdown note in your vault, and graphs import from and export to Cypher for tools that speak property graphs. CAUSAL LOOPS, FOUND FOR YOU • Draw a variable, connect causes to effects, and mark each link same-direction (+) or opposite (−). neoloopy continuously detects every closed feedback loop and badges it Reinforcing (R) or Balancing (B) — the heart of how systems grow, stall, and stabilize. • Recognize the patterns. Classic archetypes like Limits to Growth and Tragedy of the Commons surface when your structure matches them. • Read the dynamics. Mark delays, flag virtuous vs. vicious cycles, and see how much of your model sits inside feedback loops. • See an edit's impact before you commit it: which loops it creates and which it breaks. • Annotate richly. Write a note on any loop or variable to capture what it means and why it matters. STOCKS AND FLOWS • When a map is ready for more, draw it in stock-and-flow notation on the same canvas — stocks as tanks, flows as channels — and export the result as SVG. ENGAGE — BUILD FROM YOUR INTENT • Tell Engage what you want a model to help you understand or decide. It asks one model-specific question at a time until the next useful increment is clear — not a generic checklist. • Guidance stays scoped to the model in front of you, so it asks about what your model actually depends on. • Pick a journey up where you left it, or end it and start another. LEARN AS YOU GO • A built-in systems-thinking glossary explains every term — causal link, polarity, delay, reinforcing, balancing — right where you need it. LOCAL-FIRST BY DESIGN • No account required. Download it and work offline. • Your models and graphs are plain Markdown files in a folder on your device — yours to keep, back up, and open in other tools. • Obsidian-compatible vault format. Your thinking is never locked in. • Search languages: English is always on; turn on Korean for a vault and its search index covers Korean text as well. • No ads, no tracking, no analytics inside the app. • Optional cross-device Sync (in development) is end-to-end encrypted: notes are encrypted on your device before they ever leave it, so we relay only ciphertext and cannot read your models. Map a business, a habit, a team, an ecosystem, a policy, a process — anything with moving parts that affect each other. Think in loops, and keep the map.

Screenshots

SigmaNote4 screens
neoloopy4 screens

Verdict

The call

The clearest difference is in-app purchases: neoloopy at none against SigmaNote's 4. neoloopy also leads on update cadence (every 2 days vs weekly) and iOS requirement (15.0 vs 18.0). On price, ads 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. SigmaNote sells 4 in-app purchases, starting at $8.99 per month. neoloopy asks for nothing beyond the download.

UpkeepUpdate frequency

SigmaNote ships an update weekly, neoloopy every 2 days. The most recent releases landed on October 24, 2026 and October 28, 2026 respectively.

Scorecard3 real differences · 6 level
SigmaNote versus neoloopy: the parameters behind the verdict, then further details
ParameterSigmaNoteneoloopy
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyWeeklyEvery 2 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemium—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS18.015.0 — better
Further details — not scored
Size90 MB37 MB
Age rating4+4+
DeveloperSignifyID LLCAbraham Kim

In-app purchases

4 purchases

SigmaNote

Subscriptions4
  • SigmaNote Premium Monthly$8.991 Month
  • SigmaNote Premium Plus Monthly$12.991 Month
  • SigmaNote Premium Yearly$80.991 Year
Show 1 more
  • SigmaNote Premium Plus Yearly$116.991 Year
None

neoloopy

No in-app purchases

Questions

Is SigmaNote free?
SigmaNote is free to download, with in-app purchases available.
Is neoloopy free?
neoloopy is free to download, with no in-app purchases.
Do SigmaNote or neoloopy have ads?
Neither SigmaNote nor neoloopy shows ads.
Which is updated more often, SigmaNote or neoloopy?
SigmaNote ships an update weekly, and neoloopy every 2 days. Most recently, SigmaNote was updated on October 24, 2026 and neoloopy on October 28, 2026.

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