音流Soflux vs Keyin
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
音流Soflux
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Seamless Global Communication Real-time AI-powered simultaneous translation, supporting 140+ languages for effortless conversations during international travel and business meetings. Highly accurate meeting transcription, instantly converting speech to text with one-click meeting minutes export. Smart Chat Assistant Featuring an AI-driven chat model, answering questions, drafting copy, and brainstorming ideas – your ultimate office companion
Keyin
This app breaks down language barriers with real-time translation for live streams, courses, and conferences. It automatically generates editable bilingual transcripts and offers flexible text styling for efficient note-taking and content creation.
- Cross-lingual live streaming translation
- 100+ language simultaneous interpretation
- Voice-to-text notes
- Editable bilingual transcripts
- Flexible text styling
- Real-time note generation
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「Global Voices, Translated at Will」 Welcome to KeyinSync – your pocket-sized assistant for global communication and content creation. We don’t just break down language barriers – we help you capture every spark of inspiration as it happens. Whether you're watching a live stream from across the ocean, taking an overseas course, or attending an international conference, KeyinSync works like a professional simultaneous interpreter – helping you understand in real time and take notes efficiently. 【Core Features】 • Cross-Lingual Live Streaming Translate live audio in real time – no waiting for captions. Follow global product launches, gaming streams, and breaking news as if you were there. Stay in sync with the world. • 100+ Language Simultaneous Interpretation Real-time translation between over 100 languages. Covers live streams, short videos, meetings, in-game audio, and more. Communicate without barriers. • Voice-to-Text Notes – Complete & Editable Our exclusive core feature! Automatically generates editable, bilingual transcripts as you listen. Supports long-form content with no interruptions – perfect for recording hours-long conferences or documentaries without missing a word. • Flexible Text Styling Freely customize text structure, add highlights and to-dos. Organize your ideas and logic clearly – making note-taking faster and more effective. 【Use Cases】 Watch overseas live streams, documentaries, and open courses with instant bilingual captions and notes Join international conferences and online training sessions – ensure nothing gets lost in translation Daily cross-language communication and content creation – improve efficiency and understanding We offer more than translation – we provide a complete solution to hear, understand, record, and organize. From documentaries exploring the mysteries of the universe to stories of human origins 10,000 years ago, KeyinSync is your perfect companion for expanding your horizons, learning efficiently, and working deeply. 【User Agreement & Privacy Policy】 https://www.keyinx.com/user-agreement https://www.keyinx.com/privacy-policy
Screenshots
Verdict
The clearest difference is in-app purchases: 音流Soflux at none against Keyin's 3. Keyin's advantage is update cadence (every 5 days vs every 2 weeks) and device support (3 vs 1). 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
Both are free to download. Keyin sells 3 in-app purchases, starting at $24.99 per month. 音流Soflux asks for nothing beyond the download.
音流Soflux ships an update every 2 weeks, Keyin every 5 days. Both last shipped on October 30, 2026.
| Parameter | 音流Soflux | Keyin |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (10 ratings) — better |
| Number of ratings | — | 10 — better |
| Update frequency | Every 2 weeks | Every 5 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Freemium |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 14.0 — better |
| Further details — not scored | ||
| Size | 106 MB | 21 MB |
| Age rating | 17+ | 4+ |
| Developer | 深圳市矢量律动科技有限公司 | Sichuan Yunyou Lifang Technology Co., Ltd. |
In-app purchases
音流Soflux
No in-app purchases
Keyin
- 按月订阅Pro$24.991 Month
- 按年订阅Pro$149.991 Year
- 月度会员Pro$29.99







