Comparison

Theremin I/O vs AllGoRhythmics

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

Head to head
About

Theremin I/O

Transform your iPhone into a touchless musical instrument using your camera and flash. Control sound generation by hand proximity, with options for scales, sound presets, and effects. An in-app purchase enables MIDI controller functionality.

Highlights
  • Touchless instrument control via camera
  • Adjustable scales and harmony quantization
  • Multiple sound presets with effects
  • MIDI controller functionality (in-app purchase)
  • Interactive tutorial overlay
Features
Read full description

Play with light – Theremin I/O turns your iPhone into a touchless music instrument. It uses your camera and flash to measure the distance to your hand, this signal is then processed by a synthesizer to generate a tone. Features: • Old-school synthesizer • Constrain input to scales (harmony quantization) • 8 sound presets with effect controls • 50+ scale presets • Use as a MIDI controller (requires in-app purchase) • Learn fast with the tutorial overlay For more information visit http://theremin.io

About

AllGoRhythmics

Features
Read full description

AllGoRhythmics is a professional rhythm-notation tool for musicians, students, teachers, and composers who want to SEE the rhythm — not just hear it. Most metronome apps give you a click. AllGoRhythmics gives you a living score. Every pattern you build renders in real Bravura music notation — the SMuFL standard used by professional engraving software — with intelligent rest merging, beam grouping, tuplet brackets, and an animated comet playhead that tracks your place through the bar. • REAL MUSIC NOTATION Notes, rests, beams, and brackets render with the Bravura font. Smart rest merging keeps the score clean: four sixteenth rests collapse to one quarter, three to a dotted quarter, and so on. Dorico-style compact spacing keeps even dense bars readable. • TUPLETS, ANY RATIO Place any tuplet straight on the dial — triplets, quintuplets, septuplets, and beyond — engraved with proper brackets and X:Y ratio labels. Nest a tuplet inside a tuplet member when you need it. Notation and playback follow exactly what you build. • LIVE EDIT, ZERO FRICTION Tap any beat to silence it. Drag the time signature to change meters. Tap-tempo a feel by hand. Edit a pattern during playback — your changes land on the next loop. • PROFESSIONAL TIMING & SOUNDS Sample-accurate audio scheduling on a high-precision clock and AVAudioEngine — no drift, no jitter. Choose from eight sound sets, from claps and percussion to marimba, piano, 808, and a clean sine. • TRAINER + PRACTICE LOG (free for everyone) Tap along and get scored against any rhythm, with adjustable tolerance and a results summary. Every session is logged automatically with aggregate stats and a 7-day accuracy trend. • RHYTHM GENERATORS Binary Rhythms builds every 2ⁿ on/off permutation of a beat as one playlist, instantly. The new AMD (Additive / Aksak) generator builds aksak meters from 2s and 3s on a clean dotted grid at a steady pulse — a serious tool for odd-meter practice. • PLAYLISTS, BUILT FOR PRACTICE Chain presets into practice sessions. Lock BPM or RPM across the whole playlist, set per-entry repeats, and play in order, shuffled once, or reshuffled every loop. Sort your playlists, Select-All when adding presets, and Export or Import a whole playlist as a single shareable file. • EXPORT AND SHARE Render any pattern to MIDI or audio and drop it straight into your DAW or notation software. Share presets and whole playlists as files over AirDrop, Messages, or Files — and import what others send you. FREE — full power, no trial timer • All notation, comet playhead, eight sound sets, and audio • Trainer mode and Practice Log, unlimited • Time signatures and subdivisions up to 5 • 5 presets, 2 playlists of 5 entries each • 2 Binary and 2 AMD generations; 5 MIDI and 5 audio exports UNLOCK PRO — one purchase, forever • Time signatures up to 32 and subdivisions up to 16 — quintuplets, septuplets, odd meters • Tuplets with any X or Y above 5, including nested tuplets • Unlimited presets and playlists • Export and import whole playlists as shareable files • Unlimited MIDI and audio export • Unlimited Binary and AMD generation • iCloud sync across your devices WHO IT'S FOR Drummers working through Stick Control or Syncopation, jazz students feeling odd meters, composers sketching rhythms, teachers presenting in class — anyone who's wanted a metronome that shows what they're playing. BUILT FOR THE LONG RUN Made by Çağlayan Yıldız at Puja Music Productions, alongside MathRonome, Aquadrum Pro and Elvin's Numbers. Runs on iPhone, iPad, and Mac. One developer, no ads, no subscriptions, no tracking. Buy it once, own it forever. Privacy policy: https://www.pujamusic.com/privacy Support: support@pujamusic.com

Screenshots

Theremin I/O3 screens
AllGoRhythmics4 screens

Verdict

The call

The clearest difference is price: AllGoRhythmics at Free against Theremin I/O's $2.99. AllGoRhythmics also leads on update cadence (every 9 days vs every 24 months). Theremin I/O's advantage is iOS requirement (8.0 vs 17.0). 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

AllGoRhythmics is free to download; Theremin I/O costs $2.99 up front. Theremin I/O sells 1 one-off in-app purchase and AllGoRhythmics sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Theremin I/O ships an update every 24 months, AllGoRhythmics every 9 days. The most recent releases landed on August 17, 2026 and September 20, 2026 respectively.

Scorecard3 real differences · 7 level
Theremin I/O versus AllGoRhythmics: the parameters behind the verdict, then further details
ParameterTheremin I/OAllGoRhythmics
Price$2.99Free — better
Rating4.0 (5 ratings) — better—
Positive reviews76.9% of reviews—
Number of ratings5 — better—
Update frequencyEvery 24 monthsEvery 9 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationPaid—
DevicesiPhone, iPodiPhone, iPad
Requires iOS8.0 — better17.0
Further details — not scored
Size18 MB7 MB
Age rating+44+
DeveloperFFFF00 Agents ABPUJA MUZIK PRODUKSIYON ORGANIZASYON TURIZM TICARET LIMITED SIRKETI

In-app purchases

1 purchases

Theremin I/O

One-time1
  • Network MIDI$5.99
1 purchases

AllGoRhythmics

One-time1
  • AllGoRhythmics Pro$3.99

Questions

Is Theremin I/O free?
Theremin I/O costs $2.99, and also offers in-app purchases.
Is AllGoRhythmics free?
AllGoRhythmics is free to download, with in-app purchases available.
Do Theremin I/O or AllGoRhythmics have ads?
Neither Theremin I/O nor AllGoRhythmics shows ads.
Which is updated more often, Theremin I/O or AllGoRhythmics?
Theremin I/O ships an update every 24 months, and AllGoRhythmics every 9 days. Most recently, Theremin I/O was updated on August 17, 2026 and AllGoRhythmics on September 20, 2026.

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