Comparison

Opaline FM vs KAGARIBI

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

Head to head
About

Opaline FM

Create and perform music with a virtual keyboard and advanced sound editing tools. Explore various playing modes, connect external MIDI devices, and manage your sound library. Offers deep control over FM synthesis parameters.

Highlights
  • Virtual keyboard for immediate performance
  • Detailed sound editing (algorithm, operators, envelopes, LFO, effects)
  • Poly/Mono and Full/Fingered portamento
  • Single, Dual, and Split playing modes
  • External MIDI keyboard support
  • 32-voice SysEx bank management
  • Built-in reverb, delay, chorus, and tone effects
Read full description

【演奏と音色編集】 iPhone単体で起動し、画面鍵盤からすぐに演奏できます。Play画面では音色選択、ピッチベンド、モジュレーション、ポルタメントなどを操作できます。 Edit画面では、アルゴリズム、各オペレーターのRatio、Detune、Level、エンベロープ、キーボードレベルスケーリング、LFO、エフェクトなどを細かく編集できます。 POLY/MONO、FULL/FINGEREDポルタメントに対応。SINGLEに加え、2つの音色を重ねるDUAL、鍵盤を分割するSPLIT演奏も利用できます。 【外部MIDI対応】 外部MIDIキーボードを接続して演奏できます。Note On/Off、ピッチベンド、モジュレーションホイール、サステインペダル、ポルタメント制御、All Sound Off、All Notes Offに対応しています。 【音色ライブラリ】 32音色SysExバンクの読み込みと保存に対応。音色とエフェクト設定を含むライブラリを管理でき、作成した音色をバンクごとに整理できます。 【主な機能】 ・4オペレーターFM音源 ・8種類のFMアルゴリズム ・オペレーター4のフィードバック ・ピッチエンベロープ、振幅エンベロープ、LFO ・Ratio、Detune、Level設定 ・キーボードレベルスケーリング ・ベロシティ、振幅モジュレーション ・リバーブ、ディレイ、コーラス、Tone ・POLY/MONO演奏 ・FULL/FINGEREDポルタメント ・ピッチベンド範囲:0~12半音 ・SINGLE/DUAL/SPLIT演奏モード ・外部MIDI入力 ・32音色SysExバンク対応

About

KAGARIBI

This music creation tool allows users to shape and understand sound with a powerful synthesizer and an integrated sound anatomy feature. It offers extensive sound design capabilities, MIDI support, and advanced tuning options for both standalone use and as an AUv3 instrument.

Highlights
  • Dual oscillators with analog waveforms and wavetables
  • Extensive modulation matrix and effects suite
  • Integrated Sound Anatomy for sound explanation
  • Support for MPE and MIDI 2.0
  • Advanced tuning systems beyond 12-TET
  • Offline WAV export
  • Live Safe mode for reduced audio dropouts
Features
Read full description

Play a sound. Shape it. Understand why it sounds that way. KAGARIBI is a free synthesizer for iPhone and iPad with no ads, tracking, account, or network connection required. Play it standalone or load it as an AUv3 instrument. CREATE YOUR SOUND • Two oscillators with analog waveforms and six wavetable families • Up to seven-voice unison, FM, ring modulation, and hard sync • Six filter types, three envelopes, two LFOs, and an eight-slot modulation matrix • Drive, phaser, chorus, delay, reverb, compressor, and limiter • Arpeggiator and four performance macros UNDERSTAND IT — SOUND ANATOMY Sound Anatomy reads the patch you are playing and explains why it sounds the way it does. Connect what you hear to unison, filters, envelopes, LFOs, effects, and more—without leaving the instrument. PLAY AND PRODUCE • 30 factory presets • Multitouch keyboard, Hold, and Arpeggiator • MPE and MIDI 2.0, plus USB and Bluetooth MIDI input • AUv3 host automation for 95 parameters • One preset library shared between the app and AUv3 • A/B comparison, search, favorites, and a recoverable trash • Offline 48 kHz / 24-bit WAV export BEYOND 12-TET Explore 16 included tunings—from just intonation and Pythagorean to Japanese scales, 19/24/31-EDO, and Bohlen–Pierce. Import Scala .scl and .kbm files and set reference pitch from A=415 to 466 Hz. READY FOR LIVE PLAY Live Safe watches real-time processing headroom and adjusts the voice limit when needed to reduce the risk of audio dropouts. Choose Studio or Offline HQ when the session calls for more detail. Your data stays on your device. KAGARIBI includes no third-party ad SDKs, tracking, or network transmission.

Screenshots

Opaline FM3 screens
KAGARIBI4 screens

Verdict

The call

The clearest difference is update cadence: KAGARIBI at every 2 days against Opaline FM's every 6 days. On price, rating, ratings volume and ads 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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Opaline FM holds the better App Store score, 4.7 against 4.5. Both are backed by a comparable volume of ratings — 3 and 4 respectively.

UpkeepUpdate frequency

Opaline FM ships an update every 6 days, KAGARIBI every 2 days. The most recent releases landed on October 21, 2026 and October 12, 2026 respectively.

Scorecard1 real difference · 9 level
Opaline FM versus KAGARIBI: the parameters behind the verdict, then further details
ParameterOpaline FMKAGARIBI
PriceFreeFree
Rating4.7 (3 ratings) — better4.5 (4 ratings)
Positive reviews—0.0% of reviews
Number of ratings34 — better
Update frequencyEvery 6 daysEvery 2 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhoneiPhone, iPad — better
Requires iOS16.0 — better17.0
Further details — not scored
Size3 MB5 MB
Age rating4+4+
DeveloperHideki KonishiCode and DESIGN inc.

In-app purchases

None

Opaline FM

No in-app purchases

None

KAGARIBI

No in-app purchases

Questions

Is Opaline FM free?
Opaline FM is free to download, with no in-app purchases.
Is KAGARIBI free?
KAGARIBI is free to download, with no in-app purchases.
Which has better reviews, Opaline FM or KAGARIBI?
Opaline FM is rated higher. Opaline FM averages 4.7 out of 5 from 3 ratings, while KAGARIBI averages 4.5 from 4 ratings.
Do Opaline FM or KAGARIBI have ads?
Neither Opaline FM nor KAGARIBI shows ads.
Which is updated more often, Opaline FM or KAGARIBI?
Opaline FM ships an update every 6 days, and KAGARIBI every 2 days. Most recently, Opaline FM was updated on October 21, 2026 and KAGARIBI on October 12, 2026.

Other comparisons