Comparison

SoundSensei vs SpeakZilla

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

Head to head
About

SoundSensei

Features
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日本人のための発音アプリ、ついに登場。 完璧な文法で話しているのに、なぜかネイティブに聞き返される。 会議での発言が、期待したほどのインパクトを持たない。 その原因は「発音」かもしれません。 教え子9名を全国スピーチコンテストで最優秀賞に導いたアメリカ人英語教師が開発。20年以上、5,000人以上の指導経験から生まれた、日本人専用の発音トレーニングアプリです。 L/R、B/V、THなど日本人が苦手な発音を、音から文章練習まで888問で体系的にマスター。さらに、買い物・レストラン・職場などで使える「日常英会話」165フレーズを新たに搭載し、合わせて全1,053レッスンに。Azure AI音声認識があなたの発音を即座に分析し、ネイティブスピーカーとの波形比較で違いが一目でわかります。 【主な機能】 ・4段階の難易度で888個の発音練習(音・単語・文章へ段階的に上達) ・【新機能】日常英会話:16の場面・165フレーズで、実際に使う英語の発音を練習 ・リアルタイムAI音声分析による即座のフィードバック ・ネイティブ音声との波形比較で違いを視覚化 ・音素レベルの詳細分析(どの音を直すべきか明確に) ・日本語による発音コーチング音声(苦手な音や弱点をネイティブ講師が解説) ・XP、ランク、トロフィーによるゲーム感覚の進捗追跡 ・毎日の練習ストリークで学習習慣をサポート ・ライト/ダークモードに対応 【無料版】 ・毎日10回の発音分析 ・レベル1の50レッスン ・基本的なスコアとフィードバック ・進捗追跡システム ・日常英会話フレーズの視聴(録音・AI分析はプレミアム) 【プレミアム(7日間無料体験)】 ・無制限の練習セッション ・発音888問+日常英会話165フレーズ、全1,053レッスンにアクセス ・上級レベル2〜4を含む全コンテンツ ・日本語による発音コーチング音声 ・詳細な音素分析 ・高度な進捗インサイト 【こんな方におすすめ】 ・TOEIC、英検、TOEFLのスコアはあるのに発音に自信がない方 ・英語スピーチ、プレゼン、ビジネス英会話を上達させたい方 ・「もう一度言って」と聞き返されるのが嫌な方 ・人前で英語を話すのが恥ずかしい方 誰にも見られず、聞かれず、自分のペースで練習。 自信がついてから実際の会話で披露。 「いつの間に上手くなったの?」と驚かれる体験を。 サブスクリプションは現在の期間終了の少なくとも24時間前にキャンセルしない限り自動更新されます。購読はアカウント設定で管理できます。 利用規約:https://soundsensei.jp/terms プライバシーポリシー:https://soundsensei.jp/privacy

About

SpeakZilla

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Say it out loud. Find out exactly what to fix. SpeakZilla listens while you read a sentence and scores every word separately, so instead of a single number you can do nothing with, you see which sounds landed and which need another go. HOW IT WORKS The sentence plays in your coach's voice, slowly enough to hear where one word ends and the next begins. You read it back. Every word comes back coloured — green for clear, orange for close, red for another try — and the words you skipped are named rather than quietly ignored. WHAT MAKES IT DIFFERENT • Scored on pronunciation alone. Not fluency, not speed. A score that congratulates everyone teaches nothing, so this one is deliberately strict. • A coach, not a robot. Alex is British, Sofia is American, and one of them records every sentence and every word in the app. Pick the one you would rather sound like; neither is more correct. • A tip written for the sentence in front of you. Not "practise the /æ/ sound", but which words in this sentence carry it and what to do with your jaw. • A Sound Map of forty English sounds, coloured by how well you say each one, with drills for the ones you find hard. • Lessons that come back. Sounds you keep missing return on a schedule, so practice lands where it is needed rather than where you left off. HOW IT IS PACED Three new lessons a day, and your first ten are uncapped while you settle in. Anything you have finished can be replayed as often as you like, and sound drills never count against the limit. Practising a little every day beats one long session a fortnight, and the app is built around that rather than around how long you can be kept in it. Streaks, daily missions and eggs mark the days you turn up. Eggs are earned by practising and buy extra lessons — they cannot be bought with money. FROM FIRST WORDS TO NEAR-NATIVE A short placement test finds your level, then 120 lessons run from single short vowels to the contractions and reductions that make speech sound spoken. Level checkpoints confirm you are ready before the next one opens. From Intermediate up, each level closes with a short passage read in one take — where the linking and rhythm that single sentences cannot teach finally get practised. WHAT IT COSTS Nothing. No adverts, no subscription, no purchases. WHAT WE DO WITH YOUR VOICE Speech is scored as you speak and is not kept as audio. You can delete your account, your progress and everything stored with it from inside the app, at any time, without asking anyone. Made by one person who wanted to be understood the first time.

Screenshots

SoundSensei4 screens
SpeakZilla4 screens

Verdict

The call

The clearest difference is in-app purchases: SpeakZilla at none against SoundSensei's 2. SpeakZilla also leads on update cadence (every 3 days vs every 3 weeks). SoundSensei's advantage is device support (3 vs 1) and iOS requirement (14.0 vs 16.4). On price and ads 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. SoundSensei sells 2 in-app purchases, starting at $9.99 per month. SpeakZilla asks for nothing beyond the download.

UpkeepUpdate frequency

SoundSensei ships an update every 3 weeks, SpeakZilla every 3 days. The most recent releases landed on October 25, 2026 and October 29, 2026 respectively.

Scorecard4 real differences · 2 level
SoundSensei versus SpeakZilla: the parameters behind the verdict, then further details
ParameterSoundSenseiSpeakZilla
PriceFreeFree
Update frequencyEvery 3 weeksEvery 3 days — better
AdsNoNo
In-app purchasesYesNo — better
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS14.0 — better16.4
Further details — not scored
Size27 MB54 MB
Age rating4+4+
DeveloperYumie DeatsAndrew Kim

In-app purchases

2 purchases

SoundSensei

Subscriptions2
  • Premium Subscription7 Days trial$9.991 Month
  • Annual Plan7 Days trial$69.991 Year
None

SpeakZilla

No in-app purchases

Questions

Is SoundSensei free?
SoundSensei is free to download, with in-app purchases available.
Is SpeakZilla free?
SpeakZilla is free to download, with no in-app purchases.
Do SoundSensei or SpeakZilla have ads?
Neither SoundSensei nor SpeakZilla shows ads.
Which is updated more often, SoundSensei or SpeakZilla?
SoundSensei ships an update every 3 weeks, and SpeakZilla every 3 days. Most recently, SoundSensei was updated on October 25, 2026 and SpeakZilla on October 29, 2026.

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