Comparison

SolPlayer vs Speedy

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

Head to head
About

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.

Highlights
  • 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
Features
Read full description

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)

About

Speedy

Automatically adjusts music volume based on your speed, compensating for ambient noise. Works with any audio app and offers customizable settings for various vehicles. Enjoy seamless audio on the go without manual adjustments.

Highlights
  • Automatic speed-based volume compensation
  • Works with any audio app
  • Customizable compensation strength
  • Vehicle presets and custom profiles
  • Auto-detect mode for profile switching
  • Smart phone call handling
  • Apple Watch app integration
Features
Read full description

SpeedyQ automatically adjusts your music volume based on how fast you're moving — so you never have to touch the volume again. HOW IT WORKS Set your volume to a comfortable level at a stop. As you drive, SpeedyQ gradually increases the volume to compensate for road and wind noise. When you slow down, the volume comes back down. It's that simple. WORKS WITH ANY AUDIO APP SpeedyQ works with Apple Music, Spotify, podcasts, audiobooks — anything playing audio on your iPhone. SMART FEATURES • Automatic speed-based volume compensation • Works over Bluetooth with your car, motorcycle, boat, or headphones • Customizable compensation strength (Mild to Strong) • Vehicle presets for cars, motorcycles, bicycles, boats, and walking/running • Create custom vehicle profiles with personalized compensation curves • Auto-detect mode that switches profiles based on your speed • Smart phone call handling — pauses during calls and recovers automatically • Safe volume cap prevents sudden loud audio APPLE WATCH APP • See your speed and boost at a glance • Toggle SpeedyQ on/off from your wrist • Adjust compensation strength with the Digital Crown • Watch complication for your Watch face LIVE ACTIVITY & DYNAMIC ISLAND • See speed, boost, and volume on your lock screen • Dynamic Island shows real-time compensation data • Works alongside your music app's Now Playing DESIGNED FOR • Daily commuters • Road trip enthusiasts • Motorcycle riders • Boaters • Cyclists • Anyone who listens to audio on the go SET IT AND FORGET IT SpeedyQ works in the background with your screen locked. Just open it once, set your preferred strength, and enjoy perfectly adjusted volume every time you drive. Requires location access for speed detection.

Screenshots

SolPlayer4 screens
Speedy4 screens

Verdict

The call

The clearest difference is review sentiment: Speedy at 100% against SolPlayer's 57%. Speedy also leads on rating (5.0 vs 1.0) and update cadence (every 3 days vs every 3 weeks). SolPlayer's advantage is iOS requirement (15.6 vs 17.0). On price, ratings volume, ads and in-app purchases 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

Speedy holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively. Written reviews point the same way: 57% of SolPlayer's written reviews are positive against 100% of Speedy's.

UpkeepUpdate frequency

SolPlayer ships an update every 3 weeks, Speedy every 3 days. Both last shipped on October 5, 2026.

Scorecard4 real differences · 6 level
SolPlayer versus Speedy: the parameters behind the verdict, then further details
ParameterSolPlayerSpeedy
PriceFreeFree
Rating1.0 (1 ratings)5.0 (1 ratings) — better
Positive reviews57.1% of reviews100.0% of reviews — better
Number of ratings11
Update frequencyEvery 3 weeksEvery 3 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPodiPhone, iPad, Apple Watch — better
Requires iOS15.6 — better17.0
Further details — not scored
Size3 MB57 MB
Age rating4+4+
DeveloperNaoya MoriokaSpeedEQ, LLC

Customer experience

SolPlayer

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews7 reviews
Positive57.1%
Neutral14.3%
Negative28.6%

Speedy

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

SolPlayer

No in-app purchases

None

Speedy

No in-app purchases

Questions

Is SolPlayer free?
SolPlayer is free to download, with no in-app purchases.
Is Speedy free?
Speedy is free to download, with no in-app purchases.
Which has better reviews, SolPlayer or Speedy?
Speedy is rated higher. SolPlayer averages 1.0 out of 5 from 1 ratings, while Speedy averages 5.0 from 1 ratings.
Do SolPlayer or Speedy have ads?
Neither SolPlayer nor Speedy shows ads.
Which is updated more often, SolPlayer or Speedy?
SolPlayer ships an update every 3 weeks, and Speedy every 3 days. Most recently, SolPlayer was updated on October 5, 2026 and Speedy on October 5, 2026.

Other comparisons