OscDrax vs Opaline FM
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
OscDrax
Create unique sounds by drawing waveforms with your finger. This app allows you to combine four independent tracks for complex soundscapes, offering professional controls for detailed sound design.
- Draw custom waveforms
- 4-track multi-timbral synthesis
- High-resolution waveform editor
- Adjustable frequency range (20Hz-20kHz)
- Portamento effect
- Individual track volume control
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Your Fingertips Create New Sounds OscDrax is an innovative iOS waveform synthesizer that enables professional sound design through intuitive touch controls. Simply draw waveforms with your finger to instantly create original tones. Combine four independent tracks to build complex, rich soundscapes. Unleash Creativity with the Waveform Editor Our waveform drawing system maximizes the potential of touchscreen technology. With 512-point high resolution, accurately reproduce any waveform you imagine. Classic waveforms like sine, triangle, square, and sawtooth are also available at a single tap. Designed for everyone from beginners to professionals. 4-Track Multi-Timbral Synthesis Each track operates completely independently with its own waveform, frequency, and volume settings. Layer multiple tracks simultaneously to create thick, complex tones impossible with a single oscillator. Professional Controls Frequency Adjustment (20Hz-20kHz) Full coverage of human hearing range. Logarithmic scale slider provides musically natural control from bass to treble. Portamento Function (0-1000ms) Smooth glide effect between pitches. Faithfully reproduces the warm expression of analog synthesizers. Individual Volume Control Fine-tune each track's volume from 0-100%. Achieve ideal balance with precision mixing.
Opaline FM
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【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
Screenshots
Verdict
The clearest difference is price: Opaline FM at Free against OscDrax's $0.49. OscDrax's advantage is update cadence (daily vs every 6 days). On ads, in-app purchases, device support and iOS requirement 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
Opaline FM is free to download; OscDrax costs $0.49 up front. Neither carries in-app purchases, so what you see is what you pay.
OscDrax ships an update daily, Opaline FM every 6 days. The most recent releases landed on October 10, 2026 and October 4, 2026 respectively.
| Parameter | OscDrax | Opaline FM |
|---|---|---|
| Price | $0.49 | Free — better |
| Rating | 4.0 (1 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Daily — better | Every 6 days |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 17.6 | 16.0 — better |
| Further details — not scored | ||
| Size | 1 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Junpei Wada | Hideki Konishi |
In-app purchases
OscDrax
No in-app purchases
Opaline FM
No in-app purchases









