Comparison

ShadowVoice vs Onsei

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

Head to head
About

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.

Highlights
  • 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
Features
Read full description

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!

About

Onsei

Features
Read full description

Onsei is a Japanese learning app designed for focused daily study. Build vocabulary and grammar with spaced repetition, clear review flows, native audio, and scenario-based practice that helps you turn study into real usage. Features: • Vocabulary and grammar review • Spaced repetition scheduling • Daily study sessions and progress tracking • Japanese audio playback • Optional account sync across devices • Scenario-based practice for everyday situations

Screenshots

ShadowVoice4 screens
Onsei3 screens

Verdict

The call

The clearest difference is update cadence: ShadowVoice at daily against Onsei's every 10 days. Onsei's advantage is iOS requirement (15.1 vs 17.2). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

ShadowVoice ships an update daily, Onsei every 10 days. The most recent releases landed on October 3, 2026 and October 6, 2026 respectively.

Scorecard2 real differences · 7 level
ShadowVoice versus Onsei: the parameters behind the verdict, then further details
ParameterShadowVoiceOnsei
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyDaily — betterEvery 10 days
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhoneiPhone, iPod — better
Requires iOS17.215.1 — better
Further details — not scored
Size84 MB33 MB
Age rating4+12+
DeveloperJunhua Shi鑫 陈

In-app purchases

None

ShadowVoice

No in-app purchases

None

Onsei

No in-app purchases

Questions

Is ShadowVoice free?
ShadowVoice is free to download, with no in-app purchases.
Is Onsei free?
Onsei is free to download, with no in-app purchases.
Do ShadowVoice or Onsei have ads?
Neither ShadowVoice nor Onsei shows ads.
Which is updated more often, ShadowVoice or Onsei?
ShadowVoice ships an update daily, and Onsei every 10 days. Most recently, ShadowVoice was updated on October 3, 2026 and Onsei on October 6, 2026.

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