Comparison

polymachine vs Roboto AUv3 Singing Synth

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

Head to head
About

polymachine

This app offers a unique approach to music creation by combining geometric principles with modular synthesis. Explore generative algorithmic drums, oscillators, and harmonies, with specialized tools for 808s and kick drum integration.

Highlights
  • Geometric music theory integration
  • Modular synthesis engine
  • Generative algorithmic drums
  • Oscillators and harmonies
  • 808 and kick drum linking
  • Log drum pattern generator
Features
Read full description

Geometry of Music + Modular Synthesis Powerhouse, Generative Algorithmic Drums + Oscillators and Harmonies. FL Soft Clip and FL Distortion on 808s. 808s tied to Kicks. Log Drum Pattern generator

About

Roboto AUv3 Singing Synth

Create synthesized singing voices by drawing melodies and typing lyrics. Offers ten distinct voice presets, extensive vocal parameter control, and automation curves. Export your creations as WAV audio or MIDI files.

Highlights
  • Piano roll melody editor
  • Lyric input per note
  • Ten voice presets
  • Vocal parameter automation
  • WAV audio export
  • MIDI file export
  • AUv3 and standalone support
Features
Read full description

Write a melody, type a word on each note, and Roboto sings it. A synthesized singing voice with ten presets, automation curves, WAV and MIDI export. AUv3 and standalone. Roboto is a singing voice synthesizer. Write a melody in the piano roll, type a word on each note, and Roboto sings it. No samples are used: the voice comes from a glottal pulse source, five formant resonators and shaped noise for the consonants. An animated robot face follows the voice with its LED eyes and mouth, next to a live waveform and the lyrics lit in time. PIANO ROLL AND LYRICS • Draw the melody in the piano roll and type a word on each note • A note named + sings the next syllable of the previous word • English words are turned into phonemes by built-in rules and a word list • Phonemes can be typed directly, for example S-T-R-IY-T • Select notes with a box, then move, duplicate, cut, copy and paste them • A note named - keeps singing the vowel before it at a new pitch • 23 built-in songs to try, in every language TEXT TAB • The whole song as text, one entry per note in the form word:note:beats • Type a song from scratch or paste one in LANGUAGES • Sings in English, German, French, Spanish, Japanese, Russian, Finnish, Swedish, Italian and Portuguese • Spelling rules for each language and vowels measured from native speakers VOICE • Ten voice presets: Default, Robot, Soprano, Bass, Child, Whisper, Choir, Opera, Giant, Alien • Transpose and tempo, with optional sync to the host • Glide: how fast the pitch slides between legato notes • Vibrato depth and rate, jitter and breath • Consonant level and length • Formant shift (vocal tract size) and formant bandwidth • Reverb and double track • Sliders show their value on the thumb, and above your finger while you drag AUTOMATION • Curves along the song for volume, pitch bend, vibrato depth, breath, formant shift and chorus • Curve points snap to the grid and are sized for touch • All voice parameters can be automated by the host MIDI • Keys from C1 upwards sing from the matching bar for as long as they are held • Keys on MIDI channel 2 change the sung pitch live without changing the words, sliding between keys at the Glide speed • Controllers drive volume, vibrato, breath, formant shift and chorus • Bluetooth MIDI in the standalone app EXPORT • WAV audio • MIDI file with notes, lyrics, tempo and the curves as controllers AUv3 + STANDALONE Run Roboto as a standalone app on iPhone and iPad, or as an AUv3 instrument inside any AUv3 host.

Screenshots

polymachine4 screens
Roboto AUv3 Singing Synth1 screens

Verdict

The call

The clearest difference is in-app purchases: Roboto AUv3 Singing Synth at none against polymachine's 2. polymachine's advantage is review sentiment (67% vs 33%). On price, update cadence, ads 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

Both are free to download. polymachine sells 2 one-off in-app purchases. Roboto AUv3 Singing Synth asks for nothing beyond the download.

UpkeepUpdate frequency

polymachine ships an update weekly, Roboto AUv3 Singing Synth every 9 days. The most recent releases landed on October 31, 2026 and November 1, 2026 respectively.

Scorecard3 real differences · 7 level
polymachine versus Roboto AUv3 Singing Synth: the parameters behind the verdict, then further details
ParameterpolymachineRoboto AUv3 Singing Synth
PriceFreeFree
Rating3.4 (13 ratings) — better—
Positive reviews66.7% of reviews — better33.3% of reviews
Number of ratings13 — better—
Update frequencyWeekly — betterEvery 9 days
AdsNoNo
In-app purchasesYesNo — better
MonetizationPaidFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.015.0
Further details — not scored
Size106 MB18 MB
Age rating4+4+
DeveloperMike GaoDiscoDSP LLC

Customer experience

polymachine

All ratings5 ratings
Positive40.0%
Neutral0.0%
Negative60.0%
Written reviews3 reviews
Positive66.7%
Neutral0.0%
Negative33.3%

Roboto AUv3 Singing Synth

Written reviews3 reviews
Positive33.3%
Neutral0.0%
Negative66.7%

In-app purchases

2 purchases

polymachine

One-time2
  • Sound Expansion$1.99
  • Pro Features$34.99
None

Roboto AUv3 Singing Synth

No in-app purchases

Questions

Is polymachine free?
polymachine is free to download, with in-app purchases available.
Is Roboto AUv3 Singing Synth free?
Roboto AUv3 Singing Synth is free to download, with no in-app purchases.
Do polymachine or Roboto AUv3 Singing Synth have ads?
Neither polymachine nor Roboto AUv3 Singing Synth shows ads.
Which is updated more often, polymachine or Roboto AUv3 Singing Synth?
polymachine ships an update weekly, and Roboto AUv3 Singing Synth every 9 days. Most recently, polymachine was updated on October 31, 2026 and Roboto AUv3 Singing Synth on November 1, 2026.

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