Comparison

Set Theory Calculator vs Rhythm+

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

Head to head
About

Set Theory Calculator

This app analyzes musical pitch class sets using post-tonal theory. It calculates normal and prime forms, displays Forte numbers, and generates interval class vectors. Users can also transpose, invert, complement, and play sets as melodies or chords, with an included overview of set theory.

Highlights
  • Calculate Normal Form and Prime Form
  • Display Forte Number
  • Calculate interval class vector
  • Transpose and invert sets
  • Display set matrix
  • Sort, invert, or complement sets
  • Play sets as melody or chord
Features
Read full description

Set Theory Calculator is a musical set theory analysis tool and compositional aid. Using the app, you can define pitch class sets, then analyze and perform various musical set theory operations on the sets. For pitch sets you define, the app will: * Calculate Normal Form and Prime Form * Display the Forte Number * Calculate the interval class vector * Show transposed and inverted sets * Display a set matrix * Sort, invert or complement the set * Play the notes of the set as a melody or chord The app also includes a comprehensive written overview of musical set theory. Composers like Arnold Schoenberg, Alban Berg and Anton Webern employed set theory techniques to organize the pitch content of their works.

About

Rhythm+

Features
Read full description

Finally, Rhythm+ is here! After many years’ experience as musicians, we’ve never found a metronome that could do everything we wanted, therefore we are proud to present Rhythm+. Rhythm+ is an extremely accurate, user-friendly metronome packed with features and boasting a simple design. In Rhythm+ there is emphasis on easy accessibility, so no maneuvering through menu after menu cluttering up the screen. Offering everything the best professional metronomes do and more, Rhythm+ has a very intuitive ‘Pendulum Mode’ where you can make and adjust rhythmic figures. In pendulum mode as well as working with common beats and subdivisions you can access more advanced polyrhythmic functions, a unique feature to Rhythm+. What we consider to be perhaps the greatest strength of Rhythm+, (and where it differs from the best of the other metronomes), is the ‘Rhythmic Notation’ mode. In the rhythmic notation mode, you are not limited by a selection of ready-made rhythms, but with a clear ‘note keyboard’ you can input exactly the rhythms you want regardless of how complex. Working with up to 4 simultaneous staves (and as many bars as you want) you can easily input simple rhythmic patterns or complex polyrhythms. So, on the one hand you can input a drum groove (hi-hat, snare bass drum etc), alter the feel with flexible swing features add repetitions or even meter changes; and on the other hand, you can create your own time signatures to work with, create irrational rhythms, tuplets within tuplets and a myriad of other unique features. Regardless of the mode you work in, with Rhythm+ you can automate the tempo and select from a range of sounds with the added option of assigning different sounds and volume levels to each of the 4 tracks which you can then store in presets. In our view, Rhythm + is perfect as an educational tool. You can easily enter and play the rhythm you want to teach and or learn, without having to use complicated and expensive notation software. An especially useful feature of Rhythm+ for teachers is the ability to store and share exercises in the many levels of folders and sub-folders. Our ambition - to create the simplest, yet most powerful metronome on the market. So whether you are a seasoned pro or a new beginner we believe you will find Rhythm+ a most valuable tool. Enjoy! Key features: - Professional metronome - Rhythmic notation - Pendulum - Precise timing - Intuitive and easy to use - Huge sound library with programable presets - Practice mode with automated tempo changes - Tempo (tap/swipe) with range from 20 to 500 bpm - Advanced save/playlist with share functionality - In-app light and dark mode Pendulum mode: - Beats - Subdivisions - Polyrhythm Notation mode: - Easy to use notation keyboard - Note/rest values from 1/128 - double whole note - Dots, ties and marcato - Rhythmic notation in up to four staves and as many bars as you want - Navigation arrows with editing features like delete, insert or replace note/rest - Advanced time signature tool with 31 predefined time signatures and possibility to create advanced custom time signatures - Advanced adaptive tuplet tool that matches the most professional music notation software. Possibility for tuplets in tuplets. - Repeat tool - Advanced playback features: - Play click on/off with option to select click sound and click volume - Count in measure(s) - Swing 8th or 16th with possibility for continuous adjustment from light to hard swing. - Loop on/off with option to loop selected bars Playlist: - Save items with title and description text - Add or delete folders and sub folders - Reorder items in folders - Rename items/folders - Update saved items - Share items and folders(mail, airdrop) - Backup items/folders to iCloud

Screenshots

Set Theory Calculator4 screens
Rhythm+4 screens

Verdict

The call

The clearest difference is price: Set Theory Calculator at $3.99 against Rhythm+'s $8.99. Set Theory Calculator also leads on update cadence (every 3 weeks vs every 2 months). Rhythm+'s advantage is iOS requirement (13.0 vs 26.0). 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

Set Theory Calculator costs $3.99 and Rhythm+ $8.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Set Theory Calculator ships an update every 3 weeks, Rhythm+ every 2 months. The most recent releases landed on October 10, 2026 and October 25, 2026 respectively.

Scorecard3 real differences · 7 level
Set Theory Calculator versus Rhythm+: the parameters behind the verdict, then further details
ParameterSet Theory CalculatorRhythm+
Price$3.99 — better$8.99
Rating5.0 (4 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings4 — better—
Update frequencyEvery 3 weeks — betterEvery 2 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhoneiPhone, iPod — better
Requires iOS26.013.0 — better
Further details — not scored
Size8 MB24 MB
Age rating4+4+
DeveloperL TomlinBerserk Software AS

In-app purchases

None

Set Theory Calculator

No in-app purchases

None

Rhythm+

No in-app purchases

Questions

Is Set Theory Calculator free?
Set Theory Calculator costs $3.99, with no in-app purchases.
Is Rhythm+ free?
Rhythm+ costs $8.99, with no in-app purchases.
Do Set Theory Calculator or Rhythm+ have ads?
Neither Set Theory Calculator nor Rhythm+ shows ads.
Which is updated more often, Set Theory Calculator or Rhythm+?
Set Theory Calculator ships an update every 3 weeks, and Rhythm+ every 2 months. Most recently, Set Theory Calculator was updated on October 10, 2026 and Rhythm+ on October 25, 2026.

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