Nu vs speedyBallet
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Nu
This music player allows you to create custom playlists from your device's music library and apply real-time audio effects. Adjust playback speed, pitch, EQ, and reverb to personalize your listening experience. It's ideal for learning music by ear or practicing songs.
- Custom playlist creation
- Real-time speed and pitch adjustment
- 10-band equalizer with presets
- Reverb effect with adjustable decay
- Center Cancel/Emphasis for stereo
- Repeat and quick jump playback controls
- Spectrum display
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This music player lets you create custom playlists from songs on your device and apply effects in real time. (This app's playlists are registered as song links; song data is not imported into the app.) Let's use this for learning music or voice by ear. Effects List : - Speed change - Pitch change - 10-Band EQ (Equalizer) - Reverb - Center Cancel / Center Emphasis Tap the buttons (Player, Tune, EQ, Reverb) on the toolbar (bottom bar) toggles the effects UI displayed on the control screen. The app retains the effect parameters you set, so your settings remain in effect even when you switch songs. Main features : - Add songs from your music library to a playlist within this app and play songs from the playlist. - Speed change (Change playback speed while maintaining pitch): 50-200% (maximum 12.5-800% (*)) - Pitch change (Change pitch while maintaining playback speed): ±1 octave (maximum ±2 octaves (*)) - 10-Band EQ (Equalizer): Frequency (32, 64, 125, 250, 500, 1k, 2k, 4k, 8k, 16k) Hz) / 22 presets - Reverb: Adjustable decay time (Low freq, High freq) / 13 presets - Center Cancel / Center Emphasis. (for stereo file) - Repeat playback : repeat off, all songs repeat, 1 song repeat. - Quick jump (back, forward) : Select jump interval from 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 15, 20, 25, 30 sec. - Switch songs (switch one song at a time based on the order of the playlist in the app) - Sort songs (Artist, Title, Recently Added, Formerly Added) - Supports spectrum display. (Calculation Method: Max, Average) - Supports Auto-Lock ON/OFF. - Supports displaying the player on the lock screen. (*) In-App Purchase requires to use the expanded maximum change range (speed: 12.5-800%, pitch: ±2 octaves). If you'd like to try out AUv3 host and export, please use our app "Audio Unit Player". ================================================ [Note] This app can't read songs of the following formats. - Songs from Apple Music, iCloud, iTunes Match - Songs that are protected by digital copyright (DRM) ================================================
speedyBallet
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実際にプロのバレエ団でクラスやリハーサルで使用されているプレイヤーです。 ボタンがひとつひとつ大きく押しやすいのが特徴的、テンポ調整やアップルウォッチでの操作もできます。 クラスレッスンに特化したレッスンプレイヤーとリハーサルに特化したリハーサルプレイヤーはそれぞれ指導者や音出しをする団員に納得の使い心地です。 レッスンプレイヤーでは1曲終わるごとに停止し、センターレッスンでは途切れることなく曲が続くループ機能がタイトなクラスレッスン時間に役立ちます。 リハーサルプレイヤーでは曲の途中からすぐに再生できるマーキングを複数つけたり、ヴァリエーションなど頭出しが必要な曲に個別でキューを設定できます。 ・PCで取り込んでiPhoneにいれたCDの曲とiTunesストアで購入した楽曲が利用できます。 ・iPhoneで撮影した動画の音声を抽出できます。 ・ファイルアプリから音楽ファイルを取り込めます。音響さんにUSBメモリーに入れてもらってください。 ・PCなしでiPad対応のCDドライブから曲を取り込むことも可能です。(他社製の無料アプリとCDドライブとバックアップ用のUSBメモリーなどが必要です) 著作権などの関係でAppleMusicなどの月額サービスの曲には未対応です。 個人はもちろん、お教室専用iPadにすべてのレッスンCDを取り込んで使用するのに適しています。 iPhoneまたはiPadとコンパクトなスピーカーがあれば、貸しリハーサル室や舞台上稽古の時も便利です。
Screenshots
Verdict
The clearest difference is price: Nu at Free against speedyBallet's $9.99. speedyBallet's advantage is in-app purchases (none vs 2) and ads (none vs shown).
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Nu is free to download; speedyBallet costs $9.99 up front. Nu sells 2 one-off in-app purchases. speedyBallet asks for nothing beyond the download.
Nu ships an update every 3 months, speedyBallet every 6 days. The most recent releases landed on October 29, 2026 and October 7, 2026 respectively.
| Parameter | Nu | speedyBallet |
|---|---|---|
| Price | Free — better | $9.99 |
| Rating | 4.3 (63 ratings) — better | — |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | 63 — better | — |
| Update frequency | Every 3 months | Every 6 days — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod, Apple Watch — better |
| Requires iOS | 17.0 | 14.0 — better |
| Further details — not scored | ||
| Size | 5 MB | 44 MB |
| Age rating | 4+ | 4+ |
| Developer | Loop-Sessions.LLC. | taku emoto |
In-app purchases
Nu
- Expand Speed / Pitch range$0.99
- Always remove ads.$6.99
speedyBallet
No in-app purchases








