Tempo Counter vs Opaline FM
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Tempo Counter
This application helps musicians and composers determine and adjust the tempo of music. It provides real-time feedback on average and last beat tempos, aiding in composition and analysis.
- Real-time tempo detection
- Average tempo display
- Last beat tempo display
- Tempo adjustment assistance
- Music composition aid
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“Want to find a BPM that feels right while composing?” “Curious about the BPM of the song you’re listening to?” This app lets you quickly find the tempo of music. Tap the “start” button, then tap the musical note button once for each beat. The average tempo appears in the “average tenpo” field, and the tempo of the most recent beat appears in the “last lap” field.
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.
- 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
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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 Tempo Counter's $1.99. Opaline FM also leads on rating (4.7 vs 1.0) and in-app purchases (none vs 1). Tempo Counter's advantage is chart position (#194 vs unranked). On ratings volume, 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; Tempo Counter costs $1.99 up front. Tempo Counter sells 1 one-off in-app purchase. Opaline FM asks for nothing beyond the download.
Opaline FM holds the better App Store score, 4.7 against 1.0. Both are backed by a comparable volume of ratings — 2 and 3 respectively.
Tempo Counter ships an update every 28 months, Opaline FM every 6 days. The most recent releases landed on November 11, 2026 and October 31, 2026 respectively.
| Parameter | Tempo Counter | Opaline FM |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | 1.0 (2 ratings) | 4.7 (3 ratings) — better |
| Positive reviews | 33.3% of reviews | — |
| Number of ratings | 2 | 3 — better |
| Update frequency | Every 28 months | Every 6 days — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Paid | Free — better |
| Best chart rank | #194 — better | — |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 15.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 4 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | y-design | Hideki Konishi |
In-app purchases
Tempo Counter
- Full Version$0.99
Opaline FM
No in-app purchases
Questions
Is Tempo Counter free?
Is Opaline FM free?
Which has better reviews, Tempo Counter or Opaline FM?
Do Tempo Counter or Opaline FM have ads?
Which is updated more often, Tempo Counter or Opaline FM?
Other comparisons
