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On device AI note taking: summaries and action items without a server

The useful part of an AI notes app is what happens after the transcript: the summary, the to-do list, the minutes you can send. All of that can now run on an iPhone. Here is how it works in Murble, which model does what, and where the on device approach genuinely costs you something.

By Lukasz Majda Updated 25 July 2026

Two engines, one rule

Murble can write a summary two ways, and the rule that governs both is the same: the text never leaves the phone to get written.

If neither is available, Murble tells you why and offers the download. It does not fall back to a crude word frequency trick and present the result as a summary, because a summary you cannot trust is worse than none.

From recording to minutes, step by step

  1. Make sure a summary engine is available

    On a device with Apple Intelligence there is nothing to do. Otherwise open Settings → Offline AI summaries and download a model. Murble recommends the largest one your device can comfortably run, and marks anything too large for the available memory as unavailable rather than letting you install something that will crawl.

  2. Record or import the note

    Record in the app, or import an audio file you already have. Transcription happens first, on the device, because the summary is written from the transcript rather than from the audio.

  3. Read the summary

    Murble writes an overview, stars the highlights and lists the key points. Four styles are available: brief, standard, detailed and action plan. You can also have the summary written in a language other than the one spoken in the recording.

    Summaries are free, for every note, with no monthly allowance.

  4. Work the action items

    Sentences like "Marta will send the mockups on Friday" become checkable to-dos without any tagging on your part. Check them off in the app, or add your own. Sending the list to Apple Reminders, with completion syncing both ways, is a Pro extra PRO.

  5. Generate a report when you need minutes

    A report PRO turns the note into a structured write up: overview, decisions, details, action items and next steps. Export it as PDF, Markdown, RTF and more, or regenerate it later as the note changes. You can also ask the note questions in the chat tab PRO, and get answers grounded in what was actually said.

Murble summary screen with an overview paragraph, starred highlights and a list of key points
Murble Tasks tab listing detected action items with a button to sync them with Apple Reminders
Murble report screen with overview, decisions, details and action items sections
The summary, the detected action items and a structured report. All three are written by a model running on the phone.

Which local model your device can run

Language models trade size for quality, and a phone has a memory budget the app must respect. Murble ships four sizes and works out which ones fit your device before offering them.

The four local summary models, as listed in Settings, with the sizes the app shows.
Model Size What the app says
Nanoabout 400 MBSmallest and fastest, runs on any supported device
Compactabout 1.1 GBFast, with solid quality
Balancedabout 1.9 GBSharper results, needs more memory
Maximumabout 2.4 GBBest quality, slowest, high memory devices only

Automatic selection stops at Balanced. Maximum is a deliberate opt in for people who want the best result and accept the wait. A model too large for the device is shown as unavailable with a suggestion to pick a smaller one.

What is free and what is Pro

Where the line sits between the free app and the Pro extras.
Capability Tier
Recording and transcriptionFREE
AI summaries in four stylesFREE
Action item detection and the tasks listFREE
Search, folders, categories and exportFREE
Apple Reminders syncPRO
Chat with your notesPRO
Detailed reportsPRO
Translations, including live while recordingPRO
Private iCloud syncPRO

Pro is $2.99 a month, $19.99 a year or $59.99 once. If Pro lapses, your notes, transcripts, summaries and local tasks stay readable; only the five extras switch off. Full detail on the pricing section.

Honest limitations

Sources

AI notes that stay on your phone

Summaries and action items are free with no caps. Pro adds Reminders sync, chat, reports, translations and private iCloud sync.

Download on the App Store

More detail on the Murble landing page.

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