Comparison

Argon4 vs Notum

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

Head to head
About

Argon4

This app allows developers to create augmented reality experiences using open web standards. It seamlessly integrates advanced AR technology with iOS web capabilities, enabling the internet to be experienced in the real world through a device's sensors.

Highlights
  • Augmented Reality Browser
  • Open Web Standards
  • iOS Web Technology Integration
  • Device Sensor Leverage
  • AR Web Application Development
  • JavaScript API Exposure
Read full description

The Argon Augmented Reality Browser was the worlds first Augmented Reality browser based on open web standards. Argon4 is the next step in the revolution started by Argon and continued by Argon2 Isotope and Argon3, seamlessly integrating advanced AR technology with iOS web technology. Argon4 enables traditional web developers to create augmented reality applications that combine the iOS device hardware sensors with computer vision tracking technology, making it simple to move the Internet off your desktop and into the world around you. Argon4 delivers AR experiences exactly the same way traditional web experiences are delivered, by entering a URL into the address bar. Web applications for Argon4 are created using the argon.js javascript library. Visit the Argon developer site to see how to create your own AR-enabled web site. Documentation and tutorials for creating AR-enabled web content for Argon can be found on http://argonjs.io, the developer site for the argon.js library used to create platform-independent AR web content. *** For best results we recommend an iPhone5s or later. Argon4 leverages a variety of iOS device sensors including the camera, gyroscopes, compass, and accelerometers. Following the same development model as a traditional web browser, Argon4 is designed to allow rapid development and deployment of Web 2.0 style AR content. Argon4 exposes a suite of Javascript APIs into iOSs built-in web renderer, allowing developers to define a channel of augmented reality content delivered from a standard web server. This powerful combination allows easy authoring and hosting of interactive AR content, with complete control over the presentation and interactivity experienced by the user. Augmented reality experiences can be designed using existing web technologies, including WebGL, HTML, CSS and JavaScript. Just about anything that can be presented in the iPhone's Safari web browser can be pushed out into 3D in the world around the user

About

Notum

Features
Read full description

You're in the meeting but not really there. Half your attention on the conversation, half on trying to capture everything. And afterwards ‐ messy notes, missing context, forgotten details. What if you could just listen? Notum records, transcribes, and summarizes your conversations automatically. One hour of talking becomes one minute of reading. Key points, decisions, action items ‐ extracted and organized without you lifting a pen. Full transcripts you can search, copy, and share. AI summaries that cut through the noise. Background recording that works with your screen locked. End-to-end encryption so your conversations stay private. Works for meetings, calls, interviews, lectures ‐ any conversation worth remembering. Built for professionals, consultants, students, and anyone who wants to stop writing and start listening. Privacy Policy: https://sites.google.com/view/notum/privacy-policy Terms of Service: https://sites.google.com/view/notum/terms-of-service

Screenshots

Argon44 screens
Notum4 screens

Verdict

The call

The clearest difference is in-app purchases: Argon4 at none against Notum's 5. Argon4 also leads on iOS requirement (8.0 vs 13.0). On price, update cadence, 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. Notum sells 5 in-app purchases, starting at $4.99 per 7 days. Argon4 asks for nothing beyond the download.

UpkeepUpdate frequency

Argon4 ships an update every 2 weeks, Notum every 3 weeks. The most recent releases landed on November 2, 2026 and October 25, 2026 respectively.

Scorecard2 real differences · 8 level
Argon4 versus Notum: the parameters behind the verdict, then further details
ParameterArgon4Notum
PriceFreeFree
Rating5.0 (1 ratings) — better—
Positive reviews50.0% of reviews—
Number of ratings1 — better—
Update frequencyEvery 2 weeks — betterEvery 3 weeks
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS8.0 — better13.0
Further details — not scored
Size62 MB143 MB
Age rating17+4+
DeveloperGeorgia TechArtyom Frolov

In-app purchases

None

Argon4

No in-app purchases

5 purchases

Notum

Subscriptions2
  • Notum Pro Weekly7 Days trial$4.997 Days
  • Notum Pro Monthly$14.991 Month
One-time3
  • Notum 60 Extra Minutes$1.49
  • Notum 200 Extra Minutes$3.49
  • Notum 500 Extra Minutes$7.99

Questions

Is Argon4 free?
Argon4 is free to download, with no in-app purchases.
Is Notum free?
Notum is free to download, with in-app purchases available.
Do Argon4 or Notum have ads?
Neither Argon4 nor Notum shows ads.
Which is updated more often, Argon4 or Notum?
Argon4 ships an update every 2 weeks, and Notum every 3 weeks. Most recently, Argon4 was updated on November 2, 2026 and Notum on October 25, 2026.

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