Comparison

The Fourth Dimension vs SignalScope Basic 2022

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

Head to head
About

The Fourth Dimension

Explore a complex mathematical concept through an interactive 3D experience. This app uses a unique touch interface to help you visualize and understand the fourth dimension in an engaging and accessible way.

Highlights
  • Interactive 3D touch interface
  • Explains the fourth dimension
  • Accessible language for all
  • 30-page interactive book
  • Visual and hands-on learning
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The Fourth Dimension is a 30-page interactive book that explains a single mathematical idea in language that anyone can understand. Instead of static images or canned videos, this app employs a unique 3D touch interface that lets you literally grasp the concept of the fourth dimension with your own hands. “Not only can you blow your own mind over and over again, you can also enjoy watching your friends’ minds being blown in front of you.” — Cult of Mac “One of the coolest apps I've ever used... The Fourth Dimension is to boring learning apps what Carl Sagan's Cosmos was to staid science documentaries.” — BuzzFeed “The app is very cool, and it's unlike pretty much anything we've seen in the App Store.” — The Verge “This is one of my most favorite iOS apps ever.” — George Musser, contributing editor for Scientific American and author of The Complete Idiot's Guide to String Theory (App Store user reviews follow.) “Blew my mind. I generally don't use 'learning' apps as they're mostly gimmicks. This one, though, truly made me think. I hope this developer comes out with more outstanding apps such as this one. Bravo!” — Iceitic “Astounding. That some people care passionately enough about tesseracts to go create a fantastic app for others to understand them is incredible. The app is extremely well designed, wittily written, and executed with love. That alone is worth buying it, besides the fact that I learned what the hell a tesseract was.” — Duncan MacMichael “Fantastic! This is what someone really smart, and who really knows how to teach well, can do with a tablet. And the authors are funny, too, which is a neat bonus.” — DNY “Fantastic app. I work at a leading UK university. If only all our material was this well written and presented. Definitely worth buying and then spending a bit of time with over a day or two to get your head around the fourth dimension. Great app!” — JulesFM “Great job! This app does the best job explaining the 4th dimension. Why learn it in some boring classroom when here you can have an interactive and visual explanation.” — Aco Strklalj Over 250,000 people have blown their minds with this app.

About

SignalScope Basic 2022

Features
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NOTE: This app is no longer recommended for purchase. SignalScope X version 13+ offers perpetual license options as well as subscriptions. SignalScope Basic 2022 offers a basic tool set to meet your measurement and analysis needs as an engineer, consultant, educator, student, researcher, or savvy hobbyist in areas such as acoustics (sound and vibration), audio, electronics, and electroacoustics. Features: - Analyze signals coming from the Mac or iOS device’s current audio input device. - Assign engineering units to your input signals and calibrate external transducers for accurate measurements. - Assign input channel units and sensitivities for individual USB Audio devices. - Connect lab-grade microphones and sensors to your Mac, iPad, or iPhone with suitable interface hardware for precise measurements. - SignalScope offers enhanced support for select hardware from Digiducer, The Modal Shop, and miniDSP. - Nominal acoustic sensitivities included for iPhone and iPad built-in microphones, voltage sensitivities for headset input (including the standard Lightning-to-headset adapter). - Manually switch between available audio input sources. - Load microphone frequency response data (FRD) and apply frequency response correction (FRC) to FFT-based measurements. - Manually adjust audio sample rates, even up to 768 kHz, depending on input hardware. - Save acquired measurement data to CSV, tab-delimited ASCII text, or MAT files. - Save high-resolution analyzer display images to PDF files. - Retrieve your data files from your device via Files (iCloud Drive), iTunes File Sharing, or through a web browser on another device. Files may also be opened in other compatible apps (e.g. Mail, Notes, Numbers, Dropbox, etc). Basic Tools: - Oscilloscope - Basic oscilloscope and triggering functions. - FFT Analyzer - Spectrum analyzer with user-settable frequency limits and basic triggering - 2D Real-time Spectrogram Analyzer - XY Plotter - Analyze a stereo mix, or create Lissajous curves on your Mac, iPhone, or iPad. - Stereo Signal Generator Learn more about SignalScope Basic 2022 at FaberAcoustical.com. SignalScope Basic 2022 will receive major upgrades, consistent with those available in the SignalScope X Basic Tool Set subscription, through calendar year 2023, after which it will receive maintenance updates through 2025. It can be used indefinitely thereafter on a compatible version of macOS or iOS.

Screenshots

The Fourth Dimension4 screens
SignalScope Basic 20224 screens

Verdict

The call

The clearest difference is price: The Fourth Dimension at $2.99 against SignalScope Basic 2022's $59.99. The Fourth Dimension also leads on iOS requirement (12.0 vs 14.0). SignalScope Basic 2022's advantage is update cadence (every 2 months vs every 4 months). On ads, in-app purchases 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

The Fourth Dimension costs $2.99 and SignalScope Basic 2022 $59.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

The Fourth Dimension ships an update every 4 months, SignalScope Basic 2022 every 2 months. The most recent releases landed on September 26, 2026 and August 27, 2026 respectively.

Scorecard3 real differences · 7 level
The Fourth Dimension versus SignalScope Basic 2022: the parameters behind the verdict, then further details
ParameterThe Fourth DimensionSignalScope Basic 2022
Price$2.99 — better$59.99
Rating4.8 (1.9K ratings) — better—
Positive reviews94.2% of reviews—
Number of ratings1.9K — better—
Update frequencyEvery 4 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Mac — better
Requires iOS12.0 — better14.0
Further details — not scored
Size5 MB10 MB
Age rating4+4+
DeveloperLunar Skydiving LLCFaber Acoustical, LLC

In-app purchases

None

The Fourth Dimension

No in-app purchases

None

SignalScope Basic 2022

No in-app purchases

Questions

Is The Fourth Dimension free?
The Fourth Dimension costs $2.99, with no in-app purchases.
Is SignalScope Basic 2022 free?
SignalScope Basic 2022 costs $59.99, with no in-app purchases.
Do The Fourth Dimension or SignalScope Basic 2022 have ads?
Neither The Fourth Dimension nor SignalScope Basic 2022 shows ads.
Which is updated more often, The Fourth Dimension or SignalScope Basic 2022?
The Fourth Dimension ships an update every 4 months, and SignalScope Basic 2022 every 2 months. Most recently, The Fourth Dimension was updated on September 26, 2026 and SignalScope Basic 2022 on August 27, 2026.

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