On-Device AI: TTS & STT Agent

On-Device AI: TTS & STT Agent

Offline AI, Chat & Smart Voice

162 ratings
99 reviews
Free
In-App Purchases

Details

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About

Transform your device into a private AI assistant for meetings and complex tasks. Features include speaker diarization, live transcription, and specialized subagents for research, analysis, and writing. Control your AI via messaging apps, with options for 100% offline processing or cloud connectivity.

Speaker Diarization for meeting transcripts
Real-time live transcription
Natural AI speech generation
Deploy specialized AI subagents
AI-powered web browser automation
Control AI via messaging apps
100% offline processing option
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What users say

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What's New in On

1.46.0

July 9, 2026

Version 1.46.0 adds Calendar and Reminders tools, a faster Text Note workspace, stronger AI Search, and more Shortcuts support. • Calendar and Reminders tools: With your permission, AI tools can read, create, update, complete, move, and delete events or reminders after you review changes. • Text Note workspace: Create a note quickly, pick the Knowledge Library it belongs to, edit in a cleaner notes view, and keep it searchable. • Cleaner AI Search context: Web results now skip consent pages, cookie notices, search-engine boilerplate, and other unusable pages, with fallback behavior when a result set is noisy. • Save AI Search results: Import a completed AI Search answer into a Knowledge Library as a curated Markdown snapshot with the query, answer, sources, and supporting context. • Smarter note destinations: When you use multiple Knowledge Libraries, the app asks where a new note should go instead of creating duplicate default libraries. • Customizable side menu: Choose which sections stay pinned in the sidebar and open everything else from the new Menu. • More Shortcuts actions: Transcribe audio files, speak text, export generated audio, and create Text Notes from Apple Shortcuts or Siri. • Better TTS playback: Kokoro long-form playback now keeps generated segments tied to the active session, so restarts and cleanup behave more reliably. • Safer Calendar & Reminders permissions: Actions require explicit permission, personal-data consent, and a review step before changes are applied. • Fixes and improvements: Improved Text Note selection, autosave/status feedback, keyboard behavior, and sidebar navigation.

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Subscription plans

Pro Member Subscription

Pro Annually Subscription

$34.991 Year
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In-App Purchases

$49.99

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User reviews

crash crash crash

an other update with hopes crushed by constant crashes, voice mode crashes when you use the auto mode after the first answer, it does not switch into listening mode, just simply crashes no matter what voice model or ai model you use... on an M2 ipad pro with 16 gigs of ram... this app was never stable, pretty much unusable, no response from developer... don't spend money on this app, not worth it until they fix the bugs instead of packing more and more features into it.
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Response from developer

Hi trancemuter, thank you for using the app. We apologize for the inconvenience. It was a bug that has now been fixed in the latest version. You should be able to long-press and copy the model response in iOS, and select text on macOS. Please update to the newest version to try it out.

High quality and well thought out

Excellent implementation of features and very robust. This app is more advanced than most which allows you to do so many neat things. Highly recommend to pay the small fee and unlock everything

Response from developer

Thank you for supporting!

hard crash!!!

today I saw that there is an update, I was happy to try it out, maybe they fixed the problems it had, I sent emails to them about it, (no response btw) well, I open it up and starts loading the last model I was using then hard crashed immediately, not just a normal crash, it was blank screen crash!!! it was stuck on blank screen for a while unresponsive to anything, then my iPad restarted by itself, thanks God! this is the only app that hard crashes my iPad and I have over a thousand apps, I even beta test apps, I am a power user, no other app ever crashed my iPad as this app is crashing it, not only now, this app had these hard crashes many time despite the updates! I have a maxed out iPad pro M2, 16gb ram 2 tb storage, I have about 700 gigs free space on it, I was only running this app on a freshly restarted machine... this is not normal! idk what else to say but this developer is not a pro! no response from support either for weeks now, I have a lifetime membership... I think there is a new owner or something, I had good working relationship with the developer before, I was testing for them, he was responsive to me before, not anymore... yeah... 🤷‍♂️ idk...
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Response from developer

Hi trancemuter, thank you for using the app. We apologize for the inconvenience. It was a bug that has now been fixed in the latest version. You should be able to long-press and copy the model response in iOS, and select text on macOS. Please update to the newest version to try it out.

Keine Reaktion nach dem Senden…

Weder das lokale noch eine Downloaded AI reagieren auf die User-Eingabe… lost Time & Energy!

A Game-Changer for Personal AI Assistants

I’ve tested countless AI apps over the years, and OnDevice AI truly stands out as a powerhouse. Its expansive feature set covers everything you need to build and customize your own AI assistant, making it incredibly versatile for both casual and advanced users. I primarily rely on it for voice-to-text functionality across various models, which enables seamless, hands-free operation that’s a total game-changer for productivity on the go.
I’ve also dived deep into the chat flow feature, where you can assign multiple “characters” to role-play interactions between different AI models. It’s endlessly creative and fun—perfect for brainstorming, storytelling, or even simulating debates. The built-in search tool is another highlight; I use it frequently to pull in real-time information without breaking my workflow.
What I love most is running OnDevice AI strictly on my MacBook (with 64GB RAM) as an endpoint via LM Studio. This setup lets me handle the largest AI models effortlessly, without any performance hiccups or memory overload on my devices. The app integrates beautifully with Kokoro voices or Apple’s default voices, delivering natural, fluid conversations that feel truly unencumbered.
I seamlessly use this app across my iPhone, iPad, MacBook Pro, and Vision Pro—it’s a unified experience that’s hard to beat. If I could, I’d rate it 10 stars!
Suggested Features and Improvements
While OnDevice AI is already exceptional, here are some thoughtful enhancements that could elevate it even further:
• Automated Multi-Character Conversations: Introduce an option to select two or more characters and let them engage in ongoing, autonomous discussions on a given topic. Right now, users must manually alternate between characters for each exchange, which can feel tedious. As a workaround, I’ve experimented with setting up an iPhone and iPad to “talk” to each other via voice-to-voice—it’s surprisingly immersive, like listening to a live story unfold!
• Character Set Saving and Syncing: Add functionality to save, export, and import character configurations across devices. Currently, I have to recreate them manually using copy-paste and Apple’s Continuity features, which disrupts the seamless multi-device experience.
• Streamlined Search Integration: Refine the search tool to integrate more fluidly into chats without interrupting the flow (e.g., eliminate the toggle that converts the chat field into a URL input). Extend voice-mode access for quick, on-the-fly queries—like checking a product’s price—without switching sections or resuming the conversation separately afterward.
• UI Optimization for Icons: Consolidate key elements like the microphone and speaker icons into a single, more prominent area, and enlarge them slightly for better accessibility, especially on the Vision Pro where spatial interactions demand intuitive design.
• Remote Endpoint Support for Multi-Agents: Expand the multi-agent (character) system to include remote endpoints, in addition to local devices. This would align perfectly with OnDevice AI’s strengths in handling distributed AI workloads.
• HomeKit Integration: Incorporate basic controls for smart home devices, such as adjusting lights or playing music. While Siri handles this natively, OnDevice AI could offer a more customizable, AI-driven alternative for enhanced automation.
• Improved Documentation: Provide clearer guides on importing models from sources like Hugging Face—I haven’t been able to do this successfully yet, and step-by-step tutorials would be invaluable for users experimenting with custom setups.
• Expanded Agent Input Window: Enlarge the text input area for defining agents/characters; it’s currently quite restrictive, especially when this should be the focal point for creative customization.
• Per-Agent Model Assignment: For each agent—particularly in remote or cloud-based scenarios—add the ability to assign specific model sets. My MacBook can handle running multiple models simultaneously, and while this might be a niche feature, it would greatly aid in evaluating whether a particular model is suited to the task at hand.
These are just a few ideas to build on an already outstanding app—I have more in mind, but this covers my top priorities for now. Keep up the fantastic work!
Thank you!
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Developer apps

User experience

🐞

Reported Bugs

3 issues

Crashes on startup

Bug

Model selection issues

Bug

Inability to copy generated text

Bug

Requested Features

9 requests

Automated multi-character conversations

Feature

Character set saving and syncing

Feature

Streamlined search integration

Feature

UI optimization for icons

Feature

Remote endpoint support for multi-agents

Feature

HomeKit integration

Feature

Improved documentation

Feature

Enlarged agent input window

Feature

Per-agent model assignment

Feature

FAQ

What does On-Device AI do?

On-Device AI transforms your Apple device into a private AI powerhouse. It offers advanced language models, professional voice transcription, natural speech generation, and multi-agent collaboration. You can use it for tasks like mastering meetings with speaker diarization, deploying specialized subagents for complex work, and controlling your AI through messaging apps, all while maintaining complete privacy.

What are the key features of On-Device AI?

Key features include speaker diarization to identify speakers in recordings, flawless live transcription for meetings, and natural AI voices for speech generation. It also allows you to deploy expert subagents for tasks like research and writing, automate web browsing, and control your AI remotely via messaging apps like Slack and Telegram. A significant feature is its 100% offline processing capability.

Is On-Device AI free to use?

The application is free to download and use, offering core functionalities. However, it operates on a 'free with in-app purchases' model. This means that while you can access many features without cost, certain advanced capabilities, premium models, or expanded usage might require in-app purchases.

What devices is On-Device AI compatible with?

On-Device AI is designed to run directly on your Apple devices. This includes your Mac, iPad, and iPhone. The app leverages the hardware capabilities of these devices to provide its advanced AI and speech processing features, with specific optimizations for iOS and macOS.

Can I use On-Device AI for sensitive information?

Yes, the app is built with privacy as a core tenet, offering a 100% offline processing option. This means sensitive documents and data can be processed entirely on your device without being sent to any cloud servers, ensuring total security and confidentiality.