SolPlayer vs Woon
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SolPlayer
Transform your favorite music into Solfeggio sound sources. This app allows you to play music, create playlists, and adjust playback speed. It also features a unique Solfeggio mode to convert audio to specific healing frequencies.
- Music playback with repeat and resume
- Background audio playback
- Adjustable playback speed (0.1x to 8.0x)
- Playlist creation and editing
- Solfeggio mode with frequency conversion
- Two Solfeggio conversion types available
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あなたの好きな曲をソルフェジオ音源に。 あなたが普段聴いているのはどんな曲ですか? あなたの好きな曲のジャンルは? 「ヒーリング」「瞑想音楽」「クラシック」… このように、「人の身体や精神を癒やす、高める」音楽もあれば、 「J-POP」「ロック」「演歌」… このようなジャンルの音楽がすきな方もいらっしゃるでしょう。 人の好みは、人それぞれ。 だからこそ、あなたの好きな音楽を… 「人の身体や精神を癒やし、高める」効果を持つ ソルフェジオ音源(528Hz)に変えてしまいましょう! 【機能】 1.音楽再生機能 「再生」「リピート(一曲リピート・全曲リピート)」「指定位置から再生」等、一般的な音楽プレイヤーとしての機能を搭載しています。 2.バックグラウンド再生 他のアプリを使いながら、あるいはiPhoneの画面をオフにした状態で音楽を聴くことができます。 3.再生速度変更 再生スピードを0.1〜8.0倍に変更できます。リアルタイムに、高い音質のままスピードを変えられます。速聴などにどうぞ。 4.プレイリスト作成・編集 このアプリで再生する音源のプレイリストを作成・編集することが出来ます。 5.ソルフェジオモード このアプリの肝です。このプレイヤーで流せる音源すべてをソルフェジオ化することができます。ON/OFF切り替えの他、「設定」からソルフェジオ化の種類を選ぶことが出来ます。(2016/6/27現在:2種類) Ver1: 440Hzを444Hz(C:528Hz)に変換 Ver2: 440Hzを432Hzに変換 ※すでにソルフェジオ化されている音源には使用しないでください。本来の効果が半減する可能性があります。 【注意点】 ・ヘッドフォンを抜し差しした際は、安全のためプレイヤーを「停止」する仕様となっております。 ・音量変更はiPhoneのボタンで行ってください。(音量にはご注意ください)
Woon
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Some songs end too soon. Woon keeps them going. Play a song and let it run endlessly, folded back on itself so smoothly that the moment it starts again slips right past you. The drums keep moving. The atmosphere stays. After a while, you forget it was ever going to end. WHY IT FEELS DIFFERENT Repeat takes you from the ending back to the beginning. You hear the transition, and it pulls you out. Woon listens to the whole song first, finds places where it can come back around smoothly, and joins it there. Often, you simply cannot tell where the loop is. DON'T REPEAT IT. TRAVEL IT. Journey Mode goes beyond a single loop. Woon travels through the song, staying with a verse for a while, moving on, and coming back around with smooth transitions. A four-minute song becomes a place you can stay all afternoon. Try it on the built-in track the moment you open the app. Just tap TRAVEL THE SONG. MORE THAN ONE WAY TO LIVE INSIDE A SONG Woon finds different ways to loop your music. The whole song. The stretch around the chorus. The quiet part you always wished lasted longer. Each option comes with a clear quality rating. Pick the one you want to stay inside, or press play and let Woon choose the best one. TURN THE SONG YOU LOVE INTO THE SONG YOU FOCUS TO Ever wished your favourite song had an instrumental version? VOICE DOWN brings the singer into the background so you can focus on the music. Explore further with DRUMS DOWN, MELODY ONLY or BASS SOLO. All processing happens on your device. Some songs retain a faint trace of the voice, and Woon tells you when they do. MADE FOR STAYING * Endless play. When you release the loop, the song finishes naturally. * Hear the join. Jump straight to the loop point and judge it yourself. * Shape your sound with deep bass, wide space, mono fold, channel swap and a five-band equaliser. * Set a sleep timer that finishes the current pass and stops at the loop point, never mid-phrase. * Woon learns which parts of your chosen songs you prefer and starts you there. This learning stays on your device. * If a file won't open, Woon explains why, whether it is a streaming fragment, a copy-protected purchase or a surround mix. * Follow each loop with a quiet pass counter on your lock screen. * Say "Hey Siri, continue my loop in Woon" to resume your last song hands-free. * Play playlists from beginning to end, then come back around endlessly. * Keep listening with the screen off and control playback from your lock screen or headphones. * Your playlists follow your Apple ID across your devices. No separate account, password or sign-up required. WOON BRIDGE YOUR DEVICES TALK TO EACH OTHER Your devices running Woon discover each other on the same Wi-Fi network and transfer songs with the analysis already done. The receiving device can pick up without starting from zero. Transfers are encrypted, and only devices signed into your Apple ID can join. Songs move directly between your devices, with no server in the transfer path. FOR WORK, SLEEP, TRAINING, DRIVING, STUDYING One song, held for as long as you want it. No shuffle deciding for you. No ads breaking the spell. No algorithm changing the mood halfway through. Just the part you love, for as long as you love it. Woon includes a track to try immediately, so you can hear what it feels like from the moment you open the app.
Screenshots
Verdict
The clearest difference is update cadence: Woon at every 8 days against SolPlayer's every 3 weeks. On price, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
SolPlayer ships an update every 3 weeks, Woon every 8 days. The most recent releases landed on September 18, 2026 and September 12, 2026 respectively.
| Parameter | SolPlayer | Woon |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (1 ratings) — better | — |
| Positive reviews | 57.1% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 3 weeks | Every 8 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPad, Mac — better |
| Requires iOS | 15.6 — better | 16.0 |
| Further details — not scored | ||
| Size | 3 MB | 9 MB |
| Age rating | 4+ | 4+ |
| Developer | Naoya Morioka | Siroj Kasemrut |
In-app purchases
SolPlayer
No in-app purchases
Woon
No in-app purchases







