Aqua Voice: Aqua Voice is an AI-powered, system-wide voice dictation app that turns speech into refined text in real time across the apps you already use on Mac and iPhone. Letterly: Letterly is a multilingual AI speech-to-text app that turns dictated speech into polished notes, emails, summaries, and meeting transcripts across iOS, Android, Mac, Windows, and Web. We compare them on cost, capture approach, and day-to-day fit so you can choose faster.
How Hosiqo compares and tests toolsFinal recommendation
Shortlist Aqua Voice when dictating emails, documents, and slack messages hands-free across desktop apps matters most, and Letterly when transcribing and summarizing meetings or interviews with speaker separation matters most. Run both through a week of actual calls to see which suits your workflow.
Aqua Voice is an AI-powered, system-wide voice dictation app that turns speech into refined text in real time across the apps you already use on Mac and iPhone.
Letterly is a multilingual AI speech-to-text app that turns dictated speech into polished notes, emails, summaries, and meeting transcripts across iOS, Android, Mac, Windows, and Web.
Aqua Voice is an AI dictation tool built by Aqua Voice, Inc. (a Y Combinator startup) that converts spoken words into written text in real time. Rather than a standalone transcription window, it works system-wide: users hold a key (such as Space) and speak, and the dictated text is inserted into whatever app is in focus, including Gmail, Google Docs, Slack, code editors, and AI chat tools. It runs on macOS and iOS, with the iPhone app now live. Aqua is powered by Avalon, the company's proprietary speech-to-text model trained on prompt-style speech, code, and email, and it refines grammar and phrasing as you talk. It supports context awareness of on-screen content, a custom dictionary for technical terms and names, natural-language editing commands ("make this a list," "rephrase that"), style adaptation, and multilingual input across dozens of languages. It is aimed at developers, knowledge workers, and content creators who want a faster alternative to typing for emails, documents, messages, prompts, and code.
Best suited for
Letterly is a voice-to-text application that converts spoken words into clean, structured written text. Aimed at professionals, students, content creators, and anyone who prefers talking to typing, it lets users record speech directly in the app or dictate into other apps, then automatically transcribes the audio. Beyond raw transcription, Letterly applies AI rewriting so a single recording can become an email, a summary, a social post, a task list, a journal entry, or a meeting recap, using preset styles or custom instructions. It automatically detects and transcribes a wide range of languages and can handle mid-sentence language switching. For meetings and interviews, it offers speaker separation and can generate summaries from a recording. The app supports extended recordings, offline and screen-off dictation, quick-record widgets, and live sync across devices, including Apple Watch. It also integrates with external tools via Zapier and webhooks. Letterly states that user data is kept private and not used to train AI models. It runs on iOS, Android, Mac, Windows, and Web.
Best suited for
Aqua Voice is a free tier with paid upgrades (freemium); Letterly is a free tier with paid upgrades (freemium). Always confirm current pricing on each vendor's site before buying.
| Feature | Aqua Voice | Letterly |
|---|---|---|
| Core capability | System-wide dictation that inserts text into any focused app (Gmail, Docs, Slack, code editors, AI chats) | Automatic speech-to-text transcription of recorded or dictated audio |
| Standout feature | Avalon proprietary speech-to-text model tuned for technical vocabulary, code, and prompt-style speech | AI rewriting into multiple formats (emails, summaries, posts, task lists, journal entries) |
| Team usage | Custom dictionary for names, brands, and technical terms | Multilingual transcription with automatic language detection and mid-sentence switching |
| Integrations | Natural-language editing commands like 'make this a list' or 'rephrase that' mid-dictation | Meeting/interview support with speaker separation and summary generation |
| Languages & capture | Context awareness of on-screen content, including code syntax | Offline and screen-off recording, plus quick-record widget and Apple Watch dictation |
| Best-fit workflow | Multilingual input across dozens of languages | Cross-device sync and integrations via Zapier and webhooks |
Aqua Voice
Choose Aqua Voice if you need dictating emails, documents, and slack messages hands-free across desktop apps — strengths include low-friction, system-wide voice input that works inside existing apps with no per-app setup.
Letterly
Choose Letterly if you need dictating and polishing emails, messages, and notes faster than typing — strengths include broad multilingual coverage with automatic language detection.
Aqua Voice
Letterly
It depends on your workflow. Aqua Voice is strong for dictating emails, documents, and slack messages hands-free across desktop apps, while Letterly is strong for dictating and polishing emails, messages, and notes faster than typing. Both transcribe and summarize meetings.
Aqua Voice is a free tier with paid upgrades and Letterly is a free tier with paid upgrades. Check each vendor's pricing page for the latest plans and free-tier limits.
Sure. Running both makes sense when their strengths don't overlap and the budget allows.
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