Playground For LM
Run AI Models On Your Device
Free · In‑App Purchases · Designed for iPad
A major local AI upgrade: smarter model scheduling, smoother transcription, faster recovery, and up to 90% better high-load stability.
Your chats, voice transcriptions, and files stay on your device.
Playground for LM is a private local AI workspace for Apple devices. Run supported language models with local llama.cpp-based inference, chat with models offline, manage your own model library, and transcribe supported audio locally with Whisper.cpp.
The app includes a limited free trial so you can test the core workflow on your device. Playground For LM Pro unlocks the full experience, including extended local model usage, full transcription access, premium themes, and the exclusive gilded Pro app icon.
Local AI Chat
Run supported local language models directly on your device. Test models, compare responses, experiment with prompts, draft text, and build personal AI workflows without relying entirely on cloud-based chat services. Free users can try the chat workflow with a limited message allowance. Playground For LM Pro removes the free-user message restriction.
Local Audio Transcription
Turn supported recorded or imported audio into text with local Whisper.cpp-powered transcription. Review generated transcripts and organize spoken content into cleaner, more readable text. Free users can try transcription with a limited allowance. Playground For LM Pro unlocks the full transcription workflow.
Model Library Management
Choose or create your own model library folder. Add models, load them, chat with them, and unload them when you are done. Playground for LM is designed for users who want clear control over where their models are stored and how they are used.
Clean Output Rendering
Playground for LM supports readable rendering for common AI-generated formats, including Markdown, code blocks, LaTeX formulas, tables, and structured lists.
System Diagnostics
View useful runtime and model information while working with local AI. Depending on your device, model, and workflow, the app may display loading state, model status, memory-related notes, transcription state, runtime behavior, and generation performance.
Playground For LM Pro
Upgrade to Playground For LM Pro to unlock extended local model usage, full local transcription access, premium themes, the exclusive gilded Pro app icon, and future Pro features.
Privacy-Oriented by Design
When using supported local language models, inference runs on your device through the app’s local runtime. When using local transcription, supported audio is processed on device.
Some actions, such as downloading models, importing files from external locations, restoring purchases, completing in-app purchases, or opening external legal documents, may require a network connection.
Important Notes
Playground for LM does not include every possible AI model or transcription model by default. Users are responsible for ensuring that any model they use is compatible with the app and that they have the right to use it.
Local AI models and transcription models may require significant storage, memory, and processing power. Larger models may load slowly, fail to load, or perform differently depending on your device.
Generated content and transcription results may be inaccurate, incomplete, or misleading. Speech transcription may be affected by background noise, speaker accent, audio quality, language, and model limitations. Always review important information carefully before relying on it.
Playground for LM gives you a practical way to experiment with private local AI on Apple devices: local chat, Whisper.cpp-powered transcription, model management, clean rendering, diagnostics, and a focused workspace under your control.
What’s New in Version 1.8
Version 1.8 is one of the most important updates yet for Playground for LM — a full-scale evolution of local AI performance, stability, speech workflows, and interface polish across Apple devices.
At the core of this release is a carefully rebuilt architecture, designed to better adapt to a wide range of hardware configurations. From iPhone and iPad to Mac and Apple Vision Pro, Playground for LM now coordinates model loading, memory usage, and task switching more intelligently, bringing a smoother and more reliable on-device AI experience to every supported device.
Local intelligence is now significantly more stable under high-load scenarios. With a new model scheduling strategy, more precise memory coordination, and more resilient recovery logic, stability can improve by up to approximately 90% in supported workflows — without compromising performance.
Speech and transcription have also been upgraded throughout. Whisper-based voice input and audio transcription are now smoother, faster, and more reliable, with intelligent progress recovery that allows interrupted transcription tasks to continue from a saved point instead of starting over. Supported transcription history items can now automatically generate clearer, more readable titles, making long-term content management easier than ever.
Language models and speech models now work together more intelligently. When switching between local chat, voice input, audio transcription, and model recovery, Playground for LM can better allocate resources, reduce unnecessary model unloads, and recover more gracefully when temporary memory pressure occurs.
Version 1.8 also introduces a new Chip Performance page, featuring Apple chip badges and clearer capability explanations. Users can now better understand how their device supports model loading, speech recognition, multitasking, and continuous on-device AI workflows.
The interface has been refined across the app, including long-message reading, Markdown rendering, table and code previews, waveform behavior, return-position handling, colorful intelligent loading animations, completion states, sound feedback, haptics, Liquid Glass visual details, theme consistency, localization coverage, and offline legal document fallback.
This release also includes extensive reliability fixes and refinements for scrolling, model recovery, transcription history, title animations, large-screen input behavior, and overall stability.
Built for local AI. Ready for higher loads. Designed to recover faster, run longer, and feel more refined on every Apple device.
The developer, 泽铖 王, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- 泽铖 王
- Size
- 33.4 MB
- Category
- Productivity
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 26.0 or later and a Mac with Apple M1 chip or later.
- iPhone
- Languages
English and 9 more
- English, French, German, Japanese, Korean, Portuguese, Russian, Simplified Chinese, Spanish, Traditional Chinese
- Age Rating
13+
- 13+
- Infrequent
Cartoon or Fantasy Violence
Profanity or Crude Humor
Horror/Fear Themes
Medical Treatment information
Alcohol, Tobacco, Drug Use or References
Guns or Other Weapons
- In-App Purchases
Yes
- Playground For LM Pro $5.99
- Copyright
- Copyright © 2026 Wang ZeCheng. All rights reserved.

