Comparison

Time Stretch (Speed Change) vs SlowEar

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

Head to head
About

Time Stretch (Speed Change)

This music player allows real-time audio processing, including adjustable playback speed and a 31-band equalizer. It supports AUv3 effects, A-B looping, and background playback, with options to import audio files from other apps.

Highlights
  • Real-time time stretch (50-200%)
  • 31-band equalizer with presets
  • AUv3 effects support
  • A-B loop playback
  • Center Cancel/Emphasis
  • Background playback
  • Audio file export
Read full description

[ Important Notice ] With this version (7.0.0), we are ending regular updates for this app. You can continue using this app, but future development and updates will continue in 'Audio Unit Player', which includes this app's functionality. 'Audio Unit Player' is a free app that supports both speed and pitch adjustment and includes a 31-band equalizer with no band restrictions. Data Transfer: File information registered in this app is not transferred automatically to 'Audio Unit Player'. Use the Files app to manually copy any files you need."; ================================================ This app is a music player that can process the following effects in real time. - Time stretch (0.5-2.0 double speed) - 31 band equalizer (required In-App Purchase) - Reverb - AUv3 (Audio Unit v3) host If you play a musical instrument, this app should be supported by you lower the speed and play when you copy of a musical piece. [Function] - Perform time stretch in real time (50 - 200%). - 31 bands EQ (Hz: 20, 25, 31.5, 40, 50, 63, 80, 100, 125, 160, 200, 250, 315, 400, 500, 630, 800, 1k, 1.25k, 1.6k, 2k, 2.5k, 3.15k, 4k, 5k, 6.3k, 8k, 10k, 12.5k, 16k, 20k). (Initiality, only 3 bands are available. It's possible to use 31 bands by In-App Purchase.) - EQ preset (Abundant Built-in Presets / Custom Presets) (required In-App Purchase). - Reverb: Adjustable decay time (Low freq, High freq) / 13 presets - Reverb preset (Built-in Presets / Custom Presets) - Can be used as an AUv3 host. - A-B loop playback. - Center Cancel / Center Emphasis. - Lch, Rch each mute. - Quick fast forward, rewind (specify the number of seconds). - Check and set current position graphically in wave view. - Supports Auto-Lock ON/OFF. - Supports background playback. - Supports export (file writing) function (Each effect (speed/EQ) value set for each song is also reflected. The range specified in the loop section is output.) In addition to loading music data included in the standard "music" app, it also supports the function to import audio files from other apps ("Voice Memos" etc.). [How to import from "Voice Memos"] 1. Start the app "Voice Memos" and tap the mark "..." of the file to be imported from the list. 2. Tap "Share" on the sheet displayed from the bottom. 3. Tap "More" found by scrolling the displayed list of sharing destination apps to the right. 4. Select "Time Stretch" if available. The file is copied to this app. ================================================ [Note 1] This application will not be able to read songs of the following formats. - Songs from Apple Music, iCloud, iTunes Match - Songs that are protected by digital copyright (DRM) [Note 2] Depending on the state of your device, your custom AUv3 effects may not appear in the list. As a solution, you can solve the problem by starting "GarageBand" once and restarting this app. ================================================

About

SlowEar

Features
Read full description

耳コピしたいのに、速すぎて全然聞き取れない… そんな苦労を、この超シンプルツールで一掃。 あなたの音楽ファイルを読み込んで、 テンポを**遅くする**(音程はそのままキープ)。 スライダーで滑らかに30%から100%まで調整。 さらに秒単位の精密ボタンでピンポイント操作: -2.0s -0.5s -0.01s +0.5s +2.0s +0.01s 苦手フレーズを瞬時に巻き戻し・微調整しながら、 ゆっくり何度も聞き直せます。**速くする機能は一切なし**——耳コピに集中するために、余計なものは削ぎ落としました。 対応形式(すべてピッチ維持でスロー再生) ・MP3 (.mp3) ・M4A (.m4a) ・AAC (.aac) ・WAV (.wav) ・AIFF (.aiff) Struggling to transcribe songs by ear because they're just too fast? This ultra-simple tool makes that frustration disappear.Load your music file and slow down the tempo while perfectly preserving the original pitch.Use the smooth slider to adjust from 30% to 100% of the original speed. For precise control, tap the fine-tune buttons:-2.0s -0.5s -0.01s +0.5s +2.0s +0.01s Instantly rewind and fine-tune those difficult phrases, then listen slowly as many times as you need.No speed-up function whatsoever. I removed everything unnecessary so you can stay fully focused on ear copying.Supported formats (all with pitch preserved during slow playback): • MP3 (.mp3) • M4A (.m4a) • AAC (.aac) • WAV (.wav) • AIFF (.aiff) --- 中文 --- 想扒谱却太快听不清?SlowEar 在保持原音高的同时放慢速度(30–100%)。平滑滑块加上以秒为单位的精确按钮,可快速回放并反复练习难点。没有加速功能,只为专注慢速聆听。支持 MP3/M4A/AAC/WAV/AIFF。 --- 한국어 --- 곡이 너무 빨라 귀카피가 어렵나요? SlowEar는 원래 음정을 유지하면서 속도를 30~100%로 늦춥니다. 부드러운 슬라이더와 초 단위 정밀 버튼으로 어려운 구간을 되감아 반복 연습할 수 있어요. 빠르게 재생 기능은 없이 느린 청취에만 집중. MP3/M4A/AAC/WAV/AIFF 지원. --- Español --- ¿Las canciones van demasiado rápido para sacarlas de oído? SlowEar reduce la velocidad (30–100%) manteniendo el tono original. Un control deslizante suave y botones precisos al segundo te permiten rebobinar y repetir las frases difíciles. Sin función de acelerar. Compatible con MP3/M4A/AAC/WAV/AIFF. --- Français --- Morceaux trop rapides pour les relever à l'oreille ? SlowEar ralentit le tempo (30–100%) tout en conservant la hauteur d'origine. Un curseur fluide et des boutons précis à la seconde permettent de revenir en arrière et de répéter les passages difficiles. Aucune accélération. Compatible MP3/M4A/AAC/WAV/AIFF. --- Deutsch --- Songs zu schnell zum Heraushören? SlowEar verlangsamt das Tempo (30–100%) bei gleichbleibender Tonhöhe. Ein sanfter Schieberegler und sekundengenaue Tasten lassen dich schwierige Stellen zurückspulen und wiederholen. Keine Beschleunigung. Unterstützt MP3/M4A/AAC/WAV/AIFF. --- Português --- Músicas rápidas demais para tirar de ouvido? O SlowEar reduz o tempo (30–100%) mantendo o tom original. Um controle deslizante suave e botões precisos ao segundo permitem voltar e repetir os trechos difíceis. Sem função de acelerar. Compatível com MP3/M4A/AAC/WAV/AIFF. --- Italiano --- Brani troppo veloci da trascrivere a orecchio? SlowEar rallenta il tempo (30–100%) mantenendo l'altezza originale. Un cursore fluido e pulsanti precisi al secondo permettono di riavvolgere e ripetere i passaggi difficili. Nessuna accelerazione. Supporta MP3/M4A/AAC/WAV/AIFF. --- Русский --- Песни слишком быстрые, чтобы снимать на слух? SlowEar замедляет темп (30–100%), сохраняя исходную высоту тона. Плавный ползунок и точные посекундные кнопки позволяют отматывать и повторять сложные фрагменты. Без ускорения. Поддержка MP3/M4A/AAC/WAV/AIFF. --- العربية --- هل الأغاني أسرع من أن تنسخها سمعيًا؟ يبطئ SlowEar الإيقاع (30–100%) مع الحفاظ على طبقة الصوت الأصلية. منزلق سلس وأزرار دقيقة بالثانية تتيح لك الإرجاع وتكرار المقاطع الصعبة. لا توجد ميزة تسريع. يدعم MP3/M4A/AAC/WAV/AIFF.

Screenshots

Time Stretch (Speed Change)2 screens
SlowEar3 screens

Verdict

The call

The clearest difference is in-app purchases: SlowEar at none against Time Stretch (Speed Change)'s 2. SlowEar also leads on ads (none vs shown) and update cadence (every 3 weeks vs every 6 weeks). Time Stretch (Speed Change)'s advantage is iOS requirement (16.0 vs 26.2). On price 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Time Stretch (Speed Change) sells 2 one-off in-app purchases. SlowEar asks for nothing beyond the download.

UpkeepUpdate frequency

Time Stretch (Speed Change) ships an update every 6 weeks, SlowEar every 3 weeks. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.

Scorecard4 real differences · 6 level
Time Stretch (Speed Change) versus SlowEar: the parameters behind the verdict, then further details
ParameterTime Stretch (Speed Change)SlowEar
PriceFreeFree
Rating3.6 (21 ratings) — better—
Positive reviews65.8% of reviews—
Number of ratings21 — better—
Update frequencyEvery 6 weeksEvery 3 weeks — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPadiPhone, iPad
Requires iOS16.0 — better26.2
Further details — not scored
Size5 MB5 MB
Age rating4+4+
DeveloperLoop-Sessions.LLC.HIROSHI SHINKAWA

In-app purchases

2 purchases

Time Stretch (Speed Change)

One-time2
  • 31 bands equalizer$0.99
  • Always remove banner ads.$2.99
None

SlowEar

No in-app purchases

Questions

Is Time Stretch (Speed Change) free?
Time Stretch (Speed Change) is free to download, with in-app purchases available.
Is SlowEar free?
SlowEar is free to download, with no in-app purchases.
Do Time Stretch (Speed Change) or SlowEar have ads?
Time Stretch (Speed Change) shows ads; SlowEar does not.
Which is updated more often, Time Stretch (Speed Change) or SlowEar?
Time Stretch (Speed Change) ships an update every 6 weeks, and SlowEar every 3 weeks. Most recently, Time Stretch (Speed Change) was updated on October 23, 2026 and SlowEar on October 24, 2026.

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