Comparison

Chladni Screen vs Frequency Generator

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

Head to head
About

Chladni Screen

Explore the mesmerizing patterns created by sound vibrations on a digital surface. This app simulates Chladni figures, visualizing how different sounds, including your voice and instruments, create intricate geometric shapes.

Highlights
  • Simulates Chladni figures digitally
  • Visualizes sound vibrations
  • Uses voice and instruments as sound sources
  • Displays geometric patterns
  • Offers multiple display modes
Features
Read full description

Chladni figures were geometric figures first discovered by Robert Hooke in 1680 and was researched and published by Ernst Chladni in 1787. These geometric figures are typically rendered on a rigid, vibrating membrane made from materials such as metal, plastic, glass, or bowl, covered with grains, like salt and sand, and changes shapes in response to different sounds that are transmitted by mediums such as speakers and actuators. The study of such phenomena is also known as cymatics. Chladni is able to simulate the phenomena digitally. A further 3 programs can be displayed by pressing and holding each of the 3 mode buttons. Some texts in this document are taken from the following Wikipedia Creative Commons license (inheritance). https://en.wikipedia.org/wiki/Ernst_Chladni Explore the wonders and beauty of the Chladni figures as it manifests from varying sound sources such as your voice and instruments!

About

Frequency Generator

Enhance sleep and focus with scientifically engineered sound frequencies. This app offers customizable modes for deep slumber and peak concentration, utilizing binaural and isochronic beats. Enjoy an intuitive interface and offline access to boost your well-being and productivity.

Highlights
  • Sleep Mode with Delta & Theta frequencies
  • Focus Mode with Alpha & Beta frequencies
  • Binaural and Isochronic beats
  • Customizable duration and volume
  • User-friendly interface
  • Offline Mode
Features
Read full description

Introducing the Frequency Generator App, your new best friend for snoozing like a baby and concentrating like a caffeine-fueled squirrel! Are you tossing and turning like a pancake at a brunch buffet, or do you find your attention span rivaling that of a goldfish? Fear not! This app is here to serenade your brain with soothing sounds and focus-enhancing tones, turning your chaotic mind into a zen garden of productivity. So, plug in, chill out, and prepare to conquer that to-do list like a boss! Frequency Generator Features: SLEEP MODE: - Tired of counting sheep that have apparently gone on vacation? Enter Sleep Mode: your personal insomnia-busting ninja! - Select from a delightful buffet of brainwave frequencies like Delta and Theta to coax your mind into a deep slumber. (No sheep required.) - Adjust your snooze fest with customizable settings for duration and volume—because even your sleep deserves a personalized touch! FOCUS MODE: - Want to channel your inner productivity wizard? Focus Mode is here to sprinkle some brain-boosting magic dust on your concentration! - Tap into Alpha and Beta brainwave frequencies—science-approved enhancers of cognitive prowess. - Set timers that will keep you in the zone, ensuring that "procrastination" remains just a distant memory (or a Netflix binge for later). BINAURAL BEATS: - Get ready to groove with the Frequency Generator App! Our fancy binaural and isochronic beats will have your brain dancing to the rhythm of productivity. - These beats are engineered for maximum effectiveness, so you'll be riding the wave of genius in no time! User-Friendly Interface: - Our sleek design is so intuitive, even your grandma could navigate it while knitting! - Quick-start options and presets mean you can dive right in—no PhD in frequency science required! Offline Mode: - No Wi-Fi? No worries! The Frequency Generator App is your trusty sidekick, ready to deliver your favorite frequencies wherever you roam. It’s like having a personal DJ in your pocket, minus the questionable dance moves! SUBSCRIPTION AND TERMS When you download the app you can opt into a 7-day free trial. Frequency Generator offers auto-renewing monthly/yearly/weekly subscription options for access to the app's features and content. Your subscription will automatically renew at the end of each term and payment will be charged through your iTunes account. You can turn off auto-renew at any time from your iTunes account settings but refunds will not be provided for any unused portion of the term. To avoid renewal, you must cancel at least 24 hours before your subscription or trial ends. Your account will be charged for renewal within 24 hours prior to the end of the current period. Any unused portion of a free trial period will be forfeited if you purchase a subscription. Make the most of your downtime and supercharge your productivity with Frequency Generator App. Experience the power of brainwave synchronization and witness the transformative effects on your sleep and focus. Achieve better sleep, heightened focus, and an improved quality of life today. Terms of Use: https://canonicalized.com/includes/terms-and-conditions.html

Screenshots

Chladni Screen4 screens
Frequency Generator4 screens

Verdict

The call

The clearest difference is price: Frequency Generator at Free against Chladni Screen's $1.99. Frequency Generator also leads on update cadence (every 3 weeks vs every 8 months) and ratings volume (474 vs 81). Chladni Screen's advantage is in-app purchases (none vs 10) and ads (none vs shown). On rating, review sentiment 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

Frequency Generator is free to download; Chladni Screen costs $1.99 up front. Frequency Generator sells 10 in-app purchases, starting at $4.99 per 7 days. Chladni Screen asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Chladni Screen holds the better App Store score, 4.6 against 4.4. That said, the two scores are not equally well evidenced: Frequency Generator has 474 ratings behind it against 81, so its average is the more settled of the two. Written reviews point the same way: 49% of Chladni Screen's written reviews are positive against 47% of Frequency Generator's.

UpkeepUpdate frequency

Chladni Screen ships an update every 8 months, Frequency Generator every 3 weeks. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.

Scorecard7 real differences · 3 level
Chladni Screen versus Frequency Generator: the parameters behind the verdict, then further details
ParameterChladni ScreenFrequency Generator
Price$1.99Free — better
Rating4.6 (81 ratings) — better4.4 (474 ratings)
Positive reviews48.6% of reviews — better47.0% of reviews
Number of ratings81474 — better
Update frequencyEvery 8 monthsEvery 3 weeks — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better17.0
Further details — not scored
Size1 MB206 MB
Age rating4+4+
DeveloperNarumi InadaBoss Web SRL

Customer experience

Chladni Screen

All ratings81 ratings
Positive90.1%
Neutral1.2%
Negative8.6%
Written reviews35 reviews
Positive48.6%
Neutral5.7%
Negative45.7%

Frequency Generator

All ratings471 ratings
Positive83.2%
Neutral3.4%
Negative13.4%
Written reviews66 reviews
Positive47.0%
Neutral3.0%
Negative50.0%

Bugs and requests

Chladni Screen

Not enough reviews yet to summarise bugs or requests.

Frequency Generator

Reported bugs

4 issues
  • Timer shuts off after 30 seconds
  • Subscription issues
  • Free trial doesn't work
  • Frequency-Spectrum issues

Requested features

5 requests
  • Add AirPlay support
  • Increase frequency range up to 15 kHz
  • Add more sound options
  • Allow custom frequency selection
  • Improve user instructions

In-app purchases

None

Chladni Screen

No in-app purchases

10 purchases

Frequency Generator

Subscriptions9
  • Weekly Subscription$4.997 Days
  • Monthly Subscription$9.991 Month
  • Yearly Subscription Discount$19.991 Year
Show 6 more
  • Discount Best Value$24.991 Year
  • Yearly with 30 day 50% off1 Month trial$24.991 Year
  • Yearly Discount POPULAR$29.991 Year
  • Yearly Subscription$39.991 Year
  • Yearly Subscription7 Days trial$39.991 Year
  • Annual Subscription7 Days trial$39.991 Year
One-time1
  • Lifetime$149.99

Questions

Is Chladni Screen free?
Chladni Screen costs $1.99, with no in-app purchases.
Is Frequency Generator free?
Frequency Generator is free to download, with in-app purchases available.
Which has better reviews, Chladni Screen or Frequency Generator?
Chladni Screen is rated higher. Chladni Screen averages 4.6 out of 5 from 81 ratings, while Frequency Generator averages 4.4 from 474 ratings.
Do Chladni Screen or Frequency Generator have ads?
Frequency Generator shows ads; Chladni Screen does not.
Which is updated more often, Chladni Screen or Frequency Generator?
Chladni Screen ships an update every 8 months, and Frequency Generator every 3 weeks. Most recently, Chladni Screen was updated on November 6, 2026 and Frequency Generator on November 3, 2026.

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