Comparison

SigmaNote vs Chrono Planner

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

Chrono Planner

Features
Read full description

Chrono is built on a simple idea: planning your life should lower your stress, not add to it. No red badges shouting at you. No guilt over yesterday's unfinished list. Just a calm, focused space where your tasks, calendar, and goals live together — with an AI planner that doesn't just talk about your day. It acts on it. Plan. Focus. Achieve. AN AI PLANNER THAT ACTUALLY DOES THINGS (PRO) Tell Chrono what's on your mind in plain language and watch the plan take shape. In one chat, the AI Planner can: • Create new tasks, move them to better times, and mark them complete • Delete what no longer matters • Create and update goals as your priorities shift No copying suggestions back and forth. You ask, Chrono does — like a thoughtful assistant tidying your week while you talk. A CALENDAR YOU'LL ACTUALLY ENJOY • Day, multi-day, month, and year views — zoom from this afternoon to the whole year • Drag to move or resize anything, so replanning takes seconds • Overlay your Apple Calendar and see everything in one place Planning your week becomes a quiet two-minute ritual instead of a chore. TASKS THAT DON'T NAG • Capture everything in seconds, then let it go • Recurring tasks for the things that come back every day, week, or month • Priorities and categories that keep your list tidy In Chrono, an unfinished task is a plan to adjust — never a failure. GOALS THAT MOVE FORWARD Big ambitions become doable when they're connected to daily action. Link tasks to your goals and watch progress build steadily — small steps, clearly visible. FOCUS WITHOUT FRICTION Start a Pomodoro focus session and follow it right from your Lock Screen with Live Activities. Put your phone face down and stay in flow. A CALM WEEKLY RESET (PRO) Close each week with gentle insights into what you accomplished and what to carry forward. Reflection, not judgment — so every week starts with a clear head. EVERYWHERE YOU NEED IT • Home screen widget for a glanceable view of your day • Siri shortcuts to add tasks hands-free • Face ID app lock to keep your plans private • Works fully offline — your plans are always with you CHRONO PRO The AI Planner and Weekly Review are part of Chrono Pro, available as a monthly or yearly subscription. Everything else — tasks, calendar, goals, focus timer, widget, and Siri shortcuts — is included from the start. Payment is charged to your App Store account, and subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. You can manage or cancel anytime in your App Store settings. Productivity tools often borrow their energy from anxiety — streaks to protect, alarms to silence, red numbers to clear. Chrono takes the opposite path. Calm is the whole point: when your plan feels lighter, you actually follow it. Learn more at getchrono.app Terms of Use (EULA): https://getchrono.app/terms.html Privacy Policy: https://getchrono.app/privacy.html

Screenshots

SigmaNote4 screens
Chrono Planner4 screens

Verdict

The call

SigmaNote and Chrono Planner are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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 and Chrono Planner sells 2 in-app purchases, starting at $8.99 per month. Whichever you choose, the download price is not the number that matters.

ScorecardNo meaningful differences
SigmaNote versus Chrono Planner: the parameters behind the verdict, then further details
ParameterSigmaNoteChrono Planner
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyWeekly—
AdsNoNo
In-app purchasesYesYes
MonetizationFreemium—
DevicesiPhone, iPad — betteriPhone
Requires iOS18.017.0 — better
Further details — not scored
Size90 MB9 MB
Age rating4+4+
DeveloperSignifyID LLCLuc Boreas

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
2 purchases

Chrono Planner

Subscriptions2
  • Chrono Pro7 Days trial$8.991 Month
  • Chrono Pro7 Days trial$69.991 Year

Questions

Is SigmaNote free?
SigmaNote is free to download, with in-app purchases available.
Is Chrono Planner free?
Chrono Planner is free to download, with in-app purchases available.
Do SigmaNote or Chrono Planner have ads?
Neither SigmaNote nor Chrono Planner shows ads.

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