Comparison

Noteflow vs ISSY Sentry

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

Head to head
About

Noteflow

This app offers a digital notebook experience designed to replace pen and paper. It allows for note-taking, PDF annotation, sketching, and freeform idea capture with vector ink that scales without quality loss. Seamlessly integrate real-world content and organize your thoughts digitally.

Highlights
  • Digital notebook replacement for pen and paper
  • Annotate PDFs and sketch freely
  • Convert real-world images to vector ink
  • Fluid editing without traditional layers
  • Drag-and-drop integration with iOS
  • Cloud storage synchronization
Features
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Noteflow is designed to replace pen and paper. It is a modern digital notebook that lets you get the most from your iPad and iPhone. Use it for taking notes, annotating PDFs, sketching and doodling, plus a whole lot more: Copy and paste from the real world: Use Inkport gen 2 to snap a picture of a whiteboard or writing and convert it into Noteflow's native vector ink. No special paper needed. Then resize, re-color, or edit as if you wrote it in Noteflow. Create layered drawings without layers: Use the highlighter tool to color and shade behind existing ink. Use Color-Select to separate and edit individual colors. It's a much more fluid and natural editing experience than with layers. Use the straight-line tool with a grid for fast and intuitive wireframes and drafting. Drag-and-drop, cloud-storage, and more: Noteflow natively integrates with iOS's file system and drag-and-drop capabilities. Drop photos and text into Noteflow, and drag your drawings into other apps. Store your files locally or sync with the cloud service of your choice. Make Noteflow a seamless part of your workflow, the way you like. SPACE FOR YOUR IDEAS TO ROAM Our vision for Noteflow is simple: to be digital pen and paper. The magic of pen and paper is in their versatility. They are useful for so many things, but particularly for the freeform capture of ideas. Noteflow expands upon this quality. You can naturally do all the things you normally do with pen and paper: take notes in meetings or class, and jot down flashes of inspirations on the go. And you can take that to a whole new level: One of Noteflow’s best uses is for "thinking on digital paper": quickly capture key ideas and concepts, then move and organize them on the screen. Noteflow's vector ink engine lets you scale and edit your work without any loss of quality. Your words and drawings remain tack sharp when zoomed in, giving you a huge effective working canvas even on a single page. There are analogues in the physical world, such as sketchnotes or everyday working on a white board, but being able to fluidly edit and move your ideas around the page is something you can only do digitally. When you represent the ideas in your head with your own personal scribbles on the screen, it effectively becomes an extension of your mind - giving you more room to think. We've designed every part of Noteflow to let you intuitively capture and work on your ideas the way you like. Whether it's dropping in existing information, quickly sketching concepts, or assembling polished presentations for others. EVALUATE NOTEFLOW RISK FREE Rather than just read about Noteflow, go ahead and try it out: We've decided to make the Basic Edition completely FREE. The Basic Edition is a full featured note-taking and sketching app. It comes with the Fountain Pen with black ink, photos, and a standard set of 5 popular fonts for text. Books max out at 20 pages each, but you can create as many as you like. NOTEFLOW+ Upgrade instantly at any time to get: + Inkport + Import and annotate PDFs + A customizable, full color palette, + The Marker, Write-Behind Highlighter and Straight Line tools. + Rotate, Cut, Copy, Paste Ink, and Page Management, + Notebooks with unlimited pages, + Page backgrounds and sizes, + An additional 50+ fonts, + And more! Learn more in the in-app Quickstart Guide. DIGITAL TOOLS FOR A DIGITAL AGE I hope you'll find Noteflow a useful part of your workflow, and that you'll discover new ways to do things with it that weren't easy before. We're very proud of the work we've put into Noteflow, but we're also just seen the beginning of what's possible with powerful new digital platforms like the iPad. Our goal is to push these platforms to their limits to craft useful tools. Tools that can help us think a little more clearly, communicate a bit more effectively, and connect with other in new and enriching ways. Thanks for joining us on this journey! -- The App Makers @ Qrayon.

About

ISSY Sentry

Features
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ISSY Sentry is the professional guard companion app for residential communities, gated neighborhoods, and commercial buildings. Designed specifically for security personnel, it streamlines visitor management and access control with powerful, Issy to use features. KEY FEATURES ▸ QR Code Scanning Instantly validate visitor QR codes generated by residents. Verify single use, temporary, and permanent access passes with a single scan. ▸ Real-Time Notifications Automatically notify residents when their visitors arrive. Keep everyone informed with instant push notifications. ▸ Visitor Management Register visitor entries and exits with timestamps. Track vehicle plates, companion counts, and capture photos when required. ▸ Live Dashboard View real time statistics including current visitors inside, daily entries/exits, and active alerts at a glance. ▸ Incident Reporting Document security incidents with photos, location data, and detailed descriptions. Track incident status and resolution. ▸ Emergency Alerts One tap panic button for immediate emergency notifications to administrators and supervisors. ▸ Access History Complete searchable log of all access events. Filter by date, movement type, and visitor information. ▸ Offline Capability Continue essential operations even without internet connection. Data syncs automatically when connectivity is restored. SECURITY & PRIVACY - End to end encrypted communications - Secure authentication with biometric support - Role based access controls - Compliant with data protection regulations REQUIREMENTS ISSY Sentry is designed for authorized security personnel only. A valid guard account provided by your community administrator is required to access the app. For residents, please download the ISSY app to generate visitor QR codes and manage your access. ISSY Sentry is part of the ISSY Community Management Platform, the complete solution for modern residential community management. Questions or feedback? Contact us at info@joinissy.com

Screenshots

Noteflow4 screens
ISSY Sentry3 screens

Verdict

The call

The clearest difference is iOS requirement: Noteflow at 12.4 against ISSY Sentry's 15.1. On price, update cadence, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Noteflow ships an update every 6 weeks, ISSY Sentry every 2 months. The most recent releases landed on October 6, 2026 and September 30, 2026 respectively.

Scorecard1 real difference · 9 level
Noteflow versus ISSY Sentry: the parameters behind the verdict, then further details
ParameterNoteflowISSY Sentry
PriceFreeFree
Rating4.2 (182 ratings) — better—
Positive reviews46.7% of reviews—
Number of ratings182 — better—
Update frequencyEvery 6 weeks — betterEvery 2 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS12.4 — better15.1
Further details — not scored
Size14 MB26 MB
Age rating4+4+
DeveloperQrayon, LLCJOSUE LUIS BUESO RIVERA

In-app purchases

None

Noteflow

No in-app purchases

None

ISSY Sentry

No in-app purchases

Questions

Is Noteflow free?
Noteflow is free to download, with no in-app purchases.
Is ISSY Sentry free?
ISSY Sentry is free to download, with no in-app purchases.
Do Noteflow or ISSY Sentry have ads?
Neither Noteflow nor ISSY Sentry shows ads.
Which is updated more often, Noteflow or ISSY Sentry?
Noteflow ships an update every 6 weeks, and ISSY Sentry every 2 months. Most recently, Noteflow was updated on October 6, 2026 and ISSY Sentry on September 30, 2026.

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