Comparison

OpenIntelligence vs NoteOS

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

Head to head
About

OpenIntelligence

Transform your files into a private, searchable knowledge base. This app uses advanced AI to answer your questions with citations, supporting a wide range of document, audio, video, and code formats. It's designed for Apple devices with Apple Intelligence capabilities.

Highlights
  • Private knowledge base creation
  • Citation-backed Q&A
  • Supports 50+ file formats
  • On-device transcription and indexing
  • Hybrid search (keyword & vector)
  • Multiple query modes
  • Background file ingestion
Read full description

Ask a question about your own PDFs, contracts, lecture recordings or code, and get an answer with the exact passage it came from. Nothing you import leaves your device unless you allow it. Free to start, no account, no API key. OpenIntelligence reads what you import and answers in plain language, with citations you can tap to see where each claim came from. When your files don't contain the answer, it says so instead of guessing. ANSWERS START IN YOUR FILES Not in a chatbot's imagination. OpenIntelligence searches your library first, pulls the exact passages that matter, and only then writes, using Apple's on-device Apple Intelligence models. Requires an Apple Intelligence-capable device: iPhone 15 Pro or later, or an M1-or-later iPad or Mac, on iOS/iPadOS/macOS 26. Your device already had the intelligence. This gives it your knowledge, and rules of evidence. WHAT YOU CAN DO - Summarize long documents, recordings, or entire libraries. - Compare claims and details across multiple sources. - Find exact facts, dates, specifications, measurements, and table values. - Ask follow-up questions without losing the sources or the thread. - Choose Standard for quick factual work, Deep Think for multi-step questions, or Maximum for broader evidence synthesis. BRING YOUR OWN MATERIAL Import PDFs, Office documents, text and Markdown files, CSVs, code, images and scans, audio, or video. Pages, Numbers and Keynote files need to be exported to PDF first. OpenIntelligence extracts text, uses Vision OCR where needed, transcribes speech, and builds a searchable index for each library. HOW ANSWERS ARE BUILT Exact keyword matching and semantic search work together to retrieve the passages that matter. Apple Foundation Models turn those passages into a natural-language response. Then the app checks its own answer against the passages it actually used, so you can inspect what it's standing on instead of taking its word. If the sources do not establish an answer, the app flags weak support or abstains. No confident filler. WHERE YOUR FILES GO (AND DON'T) Reading your files, searching them, and choosing what to cite all happen on your device, start to finish, before anything is written. On-device answers need no connection at all. On a plane, in a dead zone, in a locked-down office, your library still works. For longer, evidence-heavy questions on iOS, iPadOS or macOS 27, you can optionally allow Apple Private Cloud Compute to do the writing. The app shows you how much would be sent and why, and asks you first. Apple says its servers keep nothing afterwards. Your material is never sent to a third-party AI provider. ANSWERS YOU CAN INSPECT Inline citations connect answers to their supporting pages and passages, one tap from claim to source. If you want more, response details go deeper: source snippets, retrieval quality, verification warnings, timing, and the route that actually produced the answer. The optional telemetry interface goes deeper when you want it and stays out of the way when you don't. LIBRARIES THAT FIT YOUR WORK Keep different subjects, projects, or clients in separate libraries. Choose Local Only or iCloud Drive (paid plans) for each library, and organize ongoing research in saved conversation threads. Siri and Shortcuts actions are available for common document and library workflows. PLANS Every plan runs the same model: Apple Intelligence on your device, Deep Think, and Private Cloud Compute after you approve what is sent. Free: 5 documents, one library, Maximum mode three times a day. Pro lifts that cap and grows to 1,000 documents and 10 libraries, monthly or yearly. Lifetime: one payment, unlimited documents, 20 libraries, Maximum every day, no renewal. OpenIntelligence is built and maintained by one developer. Pro and Lifetime support directly fund continued development. To everyone already supporting the app: thank you. It has been a wild journey. Privacy Policy: https://gunzino.me/openintelligence/privacy

About

NoteOS

Capture thoughts, organize your day, and build routines with an AI-powered productivity app. It unifies note-taking, voice capture, to-dos, and habit tracking into a single, fast workflow, reducing friction between ideas and actions.

Highlights
  • Text and voice note-taking
  • AI note processing and summarization
  • Task and priority tracking
  • Habit building and tracking
  • Unified workspace for ideas and plans
  • Fast capture for on-the-go thoughts
Features
Read full description

Capture your thoughts, organize your day, and build better routines — all in one place. NoteOS is an AI-powered productivity app that brings together note-taking, voice capture, to-dos, and habit tracking in a simple, fast workflow. Instead of jumping between separate apps for notes, tasks, and routines, you can keep everything together and move from idea to action with less friction. Whether you are saving a quick thought, recording a voice note on the go, planning your day, or trying to stay consistent with your habits, NoteOS helps you capture what matters and turn it into something useful. With NoteOS, you can: Take notes with text or voice Use AI to process, organize, and summarize your notes Keep track of tasks and daily priorities Build routines with habit tracking Store ideas, reminders, and plans in one workspace Stay focused with a cleaner system for thinking and doing Built for real life: Ideas do not always come when you are sitting down and ready to type. Sometimes you are walking, driving, working, or in the middle of something else. NoteOS is designed for those moments. Capture a thought quickly, come back later, and let AI help you make sense of it. From note-taking to action: A lot of apps help you collect information. Fewer help you do something with it. NoteOS is built to help you move from messy input to clear output. Save an idea, review it, organize it, and turn it into tasks or routines you can actually follow. One app instead of many: If you are tired of splitting your life between a notes app, a to-do app, a reminders app, and a habit tracker, NoteOS gives you a more unified system. Your thoughts, plans, and daily actions stay connected, so it is easier to stay organized without overcomplicating your workflow. Great for: Personal notes Voice notes on the go Daily planning Task management Habit tracking Brain dumps Idea capture Simple personal organization NoteOS is made for students, professionals, creators, founders, and anyone who wants a faster way to capture ideas and stay on top of daily life. If you think fast, forget things easily, or want a better way to manage notes, tasks, and habits together, NoteOS is built for you. One place to think, plan, and follow through. Developed by Fastemy - Fast and Fun Education Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

OpenIntelligence4 screens
NoteOS4 screens

Verdict

The call

The clearest difference is review sentiment: OpenIntelligence at 100% against NoteOS's 57%. OpenIntelligence also leads on update cadence (every 6 days vs every 2 months) and rating (4.8 vs 4.5). NoteOS's advantage is ratings volume (27 vs 4) and iOS requirement (17.6 vs 26.0). On price, ads, in-app purchases and monetization model 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. OpenIntelligence sells 4 in-app purchases, starting at $5.99 per month and NoteOS sells 11 in-app purchases, starting at $39.99 per year. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

OpenIntelligence holds the better App Store score, 4.8 against 4.5. That said, the two scores are not equally well evidenced: NoteOS has 27 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 100% of OpenIntelligence's written reviews are positive against 57% of NoteOS's.

UpkeepUpdate frequency

OpenIntelligence ships an update every 6 days, NoteOS every 2 months. The most recent releases landed on October 4, 2026 and October 7, 2026 respectively.

Scorecard6 real differences · 4 level
OpenIntelligence versus NoteOS: the parameters behind the verdict, then further details
ParameterOpenIntelligenceNoteOS
PriceFreeFree
Rating4.8 (4 ratings) — better4.5 (27 ratings)
Positive reviews100.0% of reviews — better57.1% of reviews
Number of ratings427 — better
Update frequencyEvery 6 days — betterEvery 2 months
AdsNoNo
In-app purchasesYesYes
MonetizationFreemiumFree with in-app purchases
DevicesiPhone, iPad, Mac — betteriPhone
Requires iOS26.017.6 — better
Further details — not scored
Size167 MB23 MB
Age rating17+4+
DeveloperGunnar HostetlerAbdullah YILMAZ

Customer experience

OpenIntelligence

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

NoteOS

All ratings27 ratings
Positive88.9%
Neutral3.7%
Negative7.4%
Written reviews7 reviews
Positive57.1%
Neutral0.0%
Negative42.9%

In-app purchases

4 purchases

OpenIntelligence

Subscriptions2
  • Pro Monthly$5.991 Month
  • Pro Annual7 Days trial$29.991 Year
One-time2
  • Document Pack$2.99
  • Lifetime Cohort$59.99
11 purchases

NoteOS

Subscriptions4
  • NoteOS Plus Yearly7 Days trial$39.991 Year
  • NoteOS Business Monthly$49.991 Month
  • NoteOS Premium Yearly$99.991 Year
Show 1 more
  • NoteOS Business Yearly$399.991 Year
One-time7
  • NoteOS 1 Hour AI Credits$0.99
  • NoteOS 500MB AI Credits$0.99
  • NoteOS 2GB AI Credits$2.99
Show 4 more
  • NoteOS 5 Hour AI Credits$3.99
  • NoteOS 10GB AI Credits$9.99
  • NoteOS 20 Hour AI Credits$12.99
  • NoteOS Plus Lifetime$49.99

Questions

Is OpenIntelligence free?
OpenIntelligence is free to download, with in-app purchases available.
Is NoteOS free?
NoteOS is free to download, with in-app purchases available.
Which has better reviews, OpenIntelligence or NoteOS?
OpenIntelligence is rated higher. OpenIntelligence averages 4.8 out of 5 from 4 ratings, while NoteOS averages 4.5 from 27 ratings.
Do OpenIntelligence or NoteOS have ads?
Neither OpenIntelligence nor NoteOS shows ads.
Which is updated more often, OpenIntelligence or NoteOS?
OpenIntelligence ships an update every 6 days, and NoteOS every 2 months. Most recently, OpenIntelligence was updated on October 4, 2026 and NoteOS on October 7, 2026.

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