Comparison

AI音声文字起こし vs ROJIN

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

Head to head
About

AI音声文字起こし

This app quickly converts audio recordings into text using advanced AI. It offers a simple, intuitive interface for transcribing meetings, interviews, and personal notes. All data is securely stored on your device, ensuring privacy.

Highlights
  • Unlimited audio to text conversion
  • High-accuracy AI speech recognition
  • Simple and intuitive recording interface
  • Easy data management by tab
  • Secure on-device data storage
  • Privacy protection
Features
Read full description

無料のもじおこしです!総ダウンロード30万超の開発者が作った、『超シンプルなもじおこし』アプリです! 無制限音声を文字にすばやく変換できる、シンプルかつ直感的なアプリです。 【こんな方におすすめ】 ・会議や講義の内容をメモしたい方 ・インタビューや取材の内容をテキスト化したい方 ・日常のちょっとしたメモを音声で残したい方 【主な特徴】 ① シンプル操作 難しい操作は一切不要。録音ボタンを押すだけで音声がすぐに文字化されます。 ② 高精度な文字起こし 最新のAIの音声認識技術を使っており、精度が高く聞き取りやすい音声変換を実現しています。 ③ データ管理も簡単 録音したデータはタブ毎に管理できます。 ④ プライバシー保護 データは端末内で安全に保存・管理され、外部に漏れる心配はありません。 音声から文字への変換をシンプルに。 『超シンプルな文字起こし』をぜひお試しください。

About

ROJIN

This app provides real-time, offline speech-to-text and translation for multiple languages. It prioritizes privacy with fully on-device processing, making it ideal for use in various settings without an internet connection.

Highlights
  • Offline multilingual speech-to-text
  • Real-time translation
  • On-device processing
  • No internet required
  • Privacy-focused
  • Low latency
Read full description

No purchase, no internet, no ads. Core Features Multilingual offline ASR: Japanese, Mandarin, Cantonese, English—real-time speech-to-text without internet. Real-time translation : Speak and translate instantly, ideal for travel, class, meetings. AI-enhanced translation (Apple Intelligence devices): Higher-quality local AI translation on supported models. Fully on-device processing: No internet access; speech and text are handled and stored locally. Privacy First No cloud upload; data stays on device. You can disable cellular/Wi-Fi access in system settings. Low Latency, Offline Ready Perfect for classrooms, commuting, travel, interviews—especially in unstable network conditions. Use Cases Lecture/class notes, meeting transcription, podcast/interview editing Travel communication, cross-language interaction, language learning Secure offline transcription in quiet/private settings Open the app, select a language. Tap to record, get instant text. System & Device Requirements ASR: iOS 16+ (latest version recommended) Real-time translation: iOS 18+ AI-enhanced translation: Requires Apple Intelligence support Features depend on device/system; speed and availability may vary. Language Support Recognition: Japanese / Mandarin / Cantonese / English Interface & documentation: continuously improving Privacy Notice This app does not access the internet or collect/upload any speech or text. All processing and data stay on your device (iOS system-level collection is unrelated to this app).

Screenshots

AI音声文字起こし4 screens
ROJIN2 screens

Verdict

The call

The clearest difference is in-app purchases: ROJIN at none against AI音声文字起こし's 3. ROJIN also leads on ads (none vs shown) and review sentiment (100% vs 71%). On price, update cadence, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. AI音声文字起こし sells 3 in-app purchases, starting at $2.99 per month. ROJIN asks for nothing beyond the download.

UpkeepUpdate frequency

AI音声文字起こし ships an update weekly, ROJIN every 5 days. Both last shipped on October 24, 2026.

Scorecard4 real differences · 6 level
AI音声文字起こし versus ROJIN: the parameters behind the verdict, then further details
ParameterAI音声文字起こしROJIN
PriceFreeFree
Rating—5.0 (1 ratings) — better
Positive reviews71.4% of reviews100.0% of reviews — better
Number of ratings—1 — better
Update frequencyWeeklyEvery 5 days — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.2 — better18.1
Further details — not scored
Size63 MB557 MB
Age rating4+4+
DeveloperAtsushi KoyamaSilicon Nexus

Customer experience

AI音声文字起こし

Written reviews7 reviews
Positive71.4%
Neutral14.3%
Negative14.3%

ROJIN

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

3 purchases

AI音声文字起こし

Subscriptions2
  • プレミアムプラン$2.991 Month
  • プレミアムプラン$29.991 Year
One-time1
  • 買い切りプラン$99.99
None

ROJIN

No in-app purchases

Questions

Is AI音声文字起こし free?
AI音声文字起こし is free to download, with in-app purchases available.
Is ROJIN free?
ROJIN is free to download, with no in-app purchases.
Do AI音声文字起こし or ROJIN have ads?
AI音声文字起こし shows ads; ROJIN does not.
Which is updated more often, AI音声文字起こし or ROJIN?
AI音声文字起こし ships an update weekly, and ROJIN every 5 days. Most recently, AI音声文字起こし was updated on October 24, 2026 and ROJIN on October 24, 2026.

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