Rapidscall

Developer Tools

Only for Mac

Free · In‑App Purchases

Mac

Train AI models directly on your Mac. No cloud, no code, no data leaves your device. Rapidscall — On device model maker Train your own AI language models on your Mac. No cloud services, no coding, no data leaves your device. Import your text data, build a tokenizer, configure a transformer model, and train it — all from one app. Watch training progress in real time with live loss charts, gradient monitoring, and automatic checkpointing. What you can do: Import any text dataset and build custom tokenizers (byte-level BPE, character BPE, SentencePiece) Train transformer language models with next-word prediction or conversational format Choose from three optimizers (AdamW, Lion, SGD) with configurable learning rate schedules Monitor training live: loss, gradient norms, learning rate, validation Pause, resume, and stop training at any time — your progress is always saved Test your model with built-in inference Early stopping to prevent overfitting Built for Apple Silicon Rapidscall runs entirely on your Mac's GPU using Metal. Unified memory means your full RAM is available for training. From MacBook Air to Mac Studio, the app adapts to your hardware. Your data stays yours Everything runs locally. Your training data, your tokenizer, your model — nothing is uploaded anywhere. Free tier Explore the full workflow: import data, build tokenizers, inspect vocabularies, train a one-layer model, and run inference. Upgrade to Pro for unlimited layers and larger models. Rapidscall Pro — $49/month Unlock unlimited model layers and train production-quality models. Family Sharing included. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://cafe.no/applikasjoner-og-personvern/

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Improved checkpointing and better stop and resume handling in training. You can now turn any saved checkpoint into a usable model.

Version 1.0.1

The developer, Cato Hernes Jensen, 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 Linked to You

    The following data may be collected but it is not linked to your identity:

    • Identifiers
    • Usage Data

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Seller
  • Cato Hernes Jensen
Size
  • 8.8 MB
Category
  • Developer Tools
Compatibility
Requires macOS 15.0 or later.
  • Mac
    Requires macOS 15.0 or later.
Languages
  • English
Age Rating
4+
In-App Purchases
Yes
Copyright
  • © 2026 Cato Hernes Jensen
  • Privacy Policy

    • Supports

    • Family Sharing

      Some in-app purchases and subscriptions may be shareable with your family group when Family Sharing is enabled. Learn More

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