Comparison

Probability Distribution vs iMSSpiece

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

Head to head
About

Probability Distribution

This app allows users to calculate probabilities and visualize various continuous and discrete probability distributions. It supports a wide range of common distributions and plans to add more in the future.

Highlights
  • Calculate probabilities
  • Visualize distributions
  • Normal (Gaussian) distribution
  • Binomial distribution
  • Poisson distribution
  • Exponential distribution
Features
Read full description

Calculate probabilities and visualize probability distributions. Supported continuous probability distributions: - Normal (Gaussian) - t (Student's t) - Chi-Squared - F - Exponential - Gamma - Beta - Log-normal Supported discrete probability distributions: - Binomial - Poisson - Pascal - Geometric - Hypergeometric and more are coming.

About

iMSSpiece

This app allows users to experiment with interactive motion sound systems and instrumental scenegraphy. It features a comprehensive score system, an intuitive cue management interface, and a flexible preset system for sound customization. Users can also define and edit regions for motion detection.

Highlights
  • Interactive motion sound systems
  • Instrumental scenegraphy
  • Mask Motion with OpenCV
  • Customizable score system
  • Intuitive cue management
  • Faust Soundplayer editor
  • Editable region system
Features
Read full description

### Overview Experience the cutting edge of interactive motion and sound with iMSSpiece, an advanced demonstration of the iMSS framework designed for iPad. Combining instrumental scenography, real-time sound processing, and OpenCV-based image analysis, iMSSpiece provides a flexible environment for experimenting with Mask Motion and interactive audiovisual works. **Example scores:** - Glossary – LWS_Part1 / LWS_Part2 / LWS_Part3 ### Cross-Platform Piece Management Create, export, import, and share complete works using the `.imsspiece` format across iPad, macOS, and Windows: - Package cues, masks, presets, Player mappings, and authorized audio files into a single work. - Import shared Pieces through Files, AirDrop, or other iOS sharing methods. - Preserve Piece UUID and revision information across devices. - Validate complete packages before installation and activation. - Support Free Pieces containing up to 16 independent audio files. - Use the same 42 Player menu values across platforms, including Stop, Thru, and Audio 1–40. - Maintain compatible Motion, Region, Cue, Custom Mask, and Faust Player controls. - Safely update an existing Piece or retain the imported work as a separate copy when conflicts occur. #### Cue System Easily manage and trigger cues through an intuitive interface: - Define cues with precise triggers and timing. - View countdowns and Region-trigger activity. - Edit cue settings during real-time experimentation. - Use above and below comparison modes for motion-based triggers. #### Preset System (Pattr) Customize and automate sound using the Faust Soundplayer editor: - Configure up to 16 Players linked to cues and motion parameters. - Select Stop, Thru, or one of 40 audio parts for each Player. - Control harmonization, gain, playback, looping, and motion mapping. - Restore defaults, validate changes, and save global presets. - Automatically preserve Player and interface settings with each Piece. #### Region Editing System Create and manage Regions for Mask Motion detection: - Configure four editable Regions linked to individual cues. - Restore defaults or create custom Region presets. - Choose from Rotated Rectangle, Rotated Ellipse, Circle, and Custom Drawing masks. - Adjust motion threshold, motion gain, and summed motion gain. - Preview camera input, masks, motion activity, and mapped values in real time. - Preserve compatible Region and Custom Mask data across iPad, macOS, and Windows.

Screenshots

Probability Distribution4 screens
iMSSpiece4 screens

Verdict

The call

The clearest difference is in-app purchases: iMSSpiece at none against Probability Distribution's 1. iMSSpiece also leads on rating (5.0 vs 4.5) and update cadence (every 3 days vs every 2 weeks). Probability Distribution's advantage is ratings volume (17 vs 1). On price, ads and iOS requirement 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. Probability Distribution sells 1 one-off in-app purchase. iMSSpiece asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

iMSSpiece holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Probability Distribution has 17 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Probability Distribution ships an update every 2 weeks, iMSSpiece every 3 days. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

Scorecard6 real differences · 4 level
Probability Distribution versus iMSSpiece: the parameters behind the verdict, then further details
ParameterProbability DistributioniMSSpiece
PriceFreeFree
Rating4.5 (17 ratings)5.0 (1 ratings) — better
Positive reviews33.3% of reviews—
Number of ratings17 — better1
Update frequencyEvery 2 weeksEvery 3 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationPaidFree — better
DevicesiPhone, iPadiPhone, iPad, iPod, Apple Watch — better
Requires iOS16.015.6 — better
Further details — not scored
Size7 MB321 MB
Age rating4+4+
DeveloperMadiyar AitbayevLisilog

Customer experience

Probability Distribution

All ratings15 ratings
Positive86.7%
Neutral0.0%
Negative13.3%
Written reviews3 reviews
Positive33.3%
Neutral0.0%
Negative66.7%

iMSSpiece

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

Probability Distribution

One-time1
  • Unlock All Distributions$2.99
None

iMSSpiece

No in-app purchases

Questions

Is Probability Distribution free?
Probability Distribution is free to download, with in-app purchases available.
Is iMSSpiece free?
iMSSpiece is free to download, with no in-app purchases.
Which has better reviews, Probability Distribution or iMSSpiece?
iMSSpiece is rated higher. Probability Distribution averages 4.5 out of 5 from 17 ratings, while iMSSpiece averages 5.0 from 1 ratings.
Do Probability Distribution or iMSSpiece have ads?
Neither Probability Distribution nor iMSSpiece shows ads.
Which is updated more often, Probability Distribution or iMSSpiece?
Probability Distribution ships an update every 2 weeks, and iMSSpiece every 3 days. Most recently, Probability Distribution was updated on November 3, 2026 and iMSSpiece on October 30, 2026.

Other comparisons