ShadowVoice vs SentenceDeck
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ShadowVoice
Practice English pronunciation using the shadowing method. Listen to native speakers, repeat, and see your voice visualized in real-time. Get instant feedback and track your progress to sound more natural.
- Real-time voice comparison with waveform display
- Sidetone monitoring for clear self-hearing
- Sentence-by-sentence practice breakdown
- Speech recognition for instant transcription
- Progress tracking of practice sessions
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ShadowVoice is your personal English pronunciation coach. Using the shadowing method, you can practice speaking by listening to native audio and repeating along while seeing your voice compared in real-time. KEY FEATURES • Real-time Voice Comparison See your pronunciation visualized alongside native speakers with waveform display. Identify differences and improve your accent. • Sidetone Monitoring Hear yourself clearly through headphones while practicing, just like professional interpreters. • Sentence-by-Sentence Practice Break down videos into manageable sentences. Master each phrase before moving on. • Speech Recognition Feedback Get instant transcription of your speech to check accuracy. • Progress Tracking Review your practice sessions and track improvement over time. PERFECT FOR - English learners at any level - Accent reduction practice - IELTS/TOEFL speaking preparation - Business English training - Anyone who wants to sound more natural The shadowing technique is used by professional interpreters worldwide. ShadowVoice brings this powerful method to your pocket. Download now and start your journey to fluent, natural-sounding English!
SentenceDeck
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Shadowing, made simple. Paste any text — a news story, a podcast transcript, a page from your textbook — and SentenceDeck turns it into a sentence-by-sentence speaking drill: hear it, say it, hear yourself back. No scripted lessons, no grades. Just the method interpreters and polyglots swear by, applied to the exact text you want to master. HOW A SESSION WORKS For every sentence, SentenceDeck: 1. Plays a clear reference voice 2. Records you automatically — recording stops when you stop speaking 3. Plays your voice back so you can hear the difference Switch on A/B compare to hear reference and recording back to back, lock a tricky sentence to loop it, and change playback speed (0.75× to 1.5×) without regenerating audio. WHAT'S NEW IN 1.5 • A redesigned home screen: pick up where you left off, and see today's sentences, your streak and your lifetime total at a glance • A richer premium voice with selectable voice styles • Free Sample articles so you can try the flow before adding your own text • Backup & Export: premium audio is included in your device backup when backups are enabled and sufficient backup space is available. Only a SentenceDeck ZIP can import compatible articles and audio on a new device; practice progress is not restored. Exported merged audio is for listening only and cannot be imported • Clearer pricing: each sentence is generated as you practice. The same sentence is charged once and cached for replay with the same premium voice and style settings; changing the premium voice or style may generate it again and use characters again TWO VOICES — ONE IS FREE System voice: built into iOS. Free, offline, unlimited. Premium voice: natural, expressive male and female voices with several speaking styles. Pay only for the sentences you practice; nothing expires. 9 VOICE LANGUAGES English, Chinese (Simplified and Traditional), Japanese, Korean, Spanish, French, Italian, German. The language of your text is detected automatically, or set it yourself. MADE FOR REAL STUDY • Works with any text: articles, dialogues, exam material, notes for a presentation • Each sentence is cached for the selected premium voice and style — generate it once, practice as often as you like • Light, dark and system themes; 10 interface languages • iPhone and iPad PREMIUM VOICE PRICING • 6,000 characters (about 100 sentences) • 30,000 characters (about 500 sentences) • 72,000 characters (about 1,200 sentences) Characters never expire. The App Store shows the local price for your region. Whether you are preparing for IELTS, TOEFL, JLPT or TOPIK, polishing a presentation, or just want to sound more natural, SentenceDeck gives you a focused, repeatable speaking routine from any text you choose. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.kuroneko-cmd.dev/privacy/sentencedeck/
Screenshots
Verdict
The clearest difference is in-app purchases: ShadowVoice at none against SentenceDeck's 3. ShadowVoice also leads on update cadence (daily vs every 6 months). On price, ads, 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
Both are free to download. SentenceDeck sells 3 one-off in-app purchases. ShadowVoice asks for nothing beyond the download.
ShadowVoice ships an update daily, SentenceDeck every 6 months. The most recent releases landed on September 16, 2026 and August 30, 2026 respectively.
| Parameter | ShadowVoice | SentenceDeck |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Daily — better | Every 6 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 17.2 | 17.0 — better |
| Further details — not scored | ||
| Size | 84 MB | 10 MB |
| Age rating | 4+ | 4+ |
| Developer | Junhua Shi | 奇濂 任 |
In-app purchases
ShadowVoice
No in-app purchases
SentenceDeck
- Credits 100$0.99
- Credits 500$3.99
- Credits 1200$7.99





