Comparison

Osculatrix vs Pentatone

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

Head to head
About

Osculatrix

This audio effect plugin offers modulated filters, delays, and saturation for creative sound design. It can transform audio from subtle coloration to complete destruction. Use it within your favorite music production apps.

Highlights
  • Modulated filters
  • Delay effects
  • Saturation
  • AUv3 plugin
  • Subtle coloration to destruction
Features
Read full description

Osculatrix is a tremolo with ideas above its station. With modulated filters, delays, a bit of saturation. Like its predecessors, it is cryptic and opinionated, and it goes from subtle colouration to total destruction at the twist of a knob. Osculatrix is an AUv3 effect plugin. It does nothing on its own. Use it in GarageBand, AUM or your favourite audio application. Osculatrix does not want your money and it doesn't want your data. It is 100% free. No ads, no in-app purchases, no subscriptions, no surveillance, no nag screens.

About

Pentatone

This music app offers a unique pentatonic keyboard and built-in synthesizer, inspired by instruments like the kora and mbira. It features a sophisticated scale selection system and is optimized for touchscreen devices, providing an expressive and easy-to-play musical experience.

Highlights
  • Easy-to-play 'strummable' pentatonic keyboard
  • 9 selectable pentatonic scales
  • Custom FM synthesizer engine
  • 25 preset sounds with macro controls
  • Polyphonic touch and aftertouch response
  • AUv3 functionality for host apps
Features
Read full description

"Beautiful, fun and inspiringly expressive" - The Arithmophone Pentatone is a music app featuring an easy to play pentatonic keyboard and a built-in synthesizer. Instead of using piano keys or a grid-based interface, Pentatone takes a fresh approach, optimised for the ergonomics of touchscreen devices and inspired by instruments like the kora and mbira. The app also has a sophisticated scale selection system that includes all the common pentatonic scale types and unlocks some more unusual ones. Pentatone features: - An easy-to-play and 'strummable' keyboard, split for two handed playing - An original pentatonic scale system with 9 selectable scales, in just intonation or standard tuning - A custom synth engine (binaural 2x2 op FM with stereo detune, resonant filter, delay and reverb) - 25 preset sounds with macro sliders for tone and ambience - Initial touch and aftertouch response, both polyphonic - AUv3 functionality for use within host apps like GarageBand, Koala Sampler and Loopy Pro Pentatone user feedback: "Amazing! Love the simple UI and the musical keyboard. Also the sounds are lovely!" "This is very cool - beautiful interface and instantly musical." "This really is a joy to play and the tones are really expressive in fun ways that invite different types of creativity." "This app is such a brilliant idea!" "This is amazing. So fun to play. So easy to play with my daughter and my niece. The tones are wonderful." "This is an inspiringly expressive instrument! Really a joy to interact with." "This thing is AWESOME! It’s so easy to make up new stuff with it!" *** Pentatone is part of the Arithmophone project An Arithmophone is a thing that turns numbers into sounds, or math into music. Its name is derived from the ancient Greek words arithmos (number) and phone (sound). Any iPhone or iPad is itself an Arithmophone, because it routinely turns lists of binary numbers into sounds, for example when you use it to listen to music. But this app is a bit more 'arithmophonic' still, because it takes pure and simple harmonic ratios like 3:2 and 5:4 and uses these to build musical scales. You can use it as an easy-to-play instrument, a source of melodic and harmonic inspiration or a tool for learning about music and exploring the deep connection it has with numbers. Keep an eye out, future plans for the Arithmophone on iOS include: - PENTATONE JR., a simplified and text-free version of Pentatone, optimized for young/beginning musicians - DIATONE, the diatonic companion to Pentatone, featuring a 7-note-per-octave keyboard with all the familiar major and minor scales and modes - MIDI / MPE versions of Pentatone and Diatone - TONEHIVE, a microtonal keyboard synth for 7 limit just intonation - HUYGENS, a microtonal keyboard synth for 31 EDO To stay posted, join the community at reddit.com/r/arithmophone or subscribe to the Arithmophone youtube channel: https://www.youtube.com/@arithmophone

Screenshots

Osculatrix2 screens
Pentatone4 screens

Verdict

The call

Osculatrix and Pentatone are too close to call on the numbers: across 10 compared parameters — price, rating, review sentiment and ratings volume among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Osculatrix against 5.0 for Pentatone. Both are backed by a comparable volume of ratings — 7 and 13 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

Osculatrix ships an update monthly, Pentatone every 5 weeks. The most recent releases landed on October 24, 2026 and October 13, 2026 respectively.

ScorecardNo meaningful differences
Osculatrix versus Pentatone: the parameters behind the verdict, then further details
ParameterOsculatrixPentatone
PriceFreeFree
Rating5.0 (7 ratings)5.0 (13 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings713 — better
Update frequencyMonthly — betterEvery 5 weeks
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.0 — better15.6
Further details — not scored
Size2 MB16 MB
Age rating4+4+
DeveloperMatthew CaldwellChiel Zwinkels

Customer experience

Osculatrix

All ratings7 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Pentatone

All ratings13 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Osculatrix

No in-app purchases

None

Pentatone

No in-app purchases

Questions

Is Osculatrix free?
Osculatrix is free to download, with no in-app purchases.
Is Pentatone free?
Pentatone is free to download, with no in-app purchases.
Which has better reviews, Osculatrix or Pentatone?
Osculatrix and Pentatone are both rated 5.0 out of 5 on the App Store, from 7 and 13 ratings respectively.
Do Osculatrix or Pentatone have ads?
Neither Osculatrix nor Pentatone shows ads.
Which is updated more often, Osculatrix or Pentatone?
Osculatrix ships an update monthly, and Pentatone every 5 weeks. Most recently, Osculatrix was updated on October 24, 2026 and Pentatone on October 13, 2026.

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