Short answer. Use Obsidian mobile for writing and organizing, or its built-in Capture actions to append text from Shortcuts without opening the app. SimpleMemo (Simple Memo - for Obsidian) is an option when you want a dedicated capture screen, a configured vault destination, and an email copy. Its folder-direct append writes locally when the vault file is available on your iPhone; email delivery needs a connection. Choose the route that fits your destination and setup.

Choose a capture route for the situation

Writing a long note and saving a passing thought are different tasks. Opening a vault and choosing a note may suit the first; a preconfigured destination may suit the second. The six approaches below include two different Shortcut routes, which have different setup and app-opening behavior.

Method 1: Type directly in Obsidian mobile

Open your vault in the official app and write. This is a useful starting point for linking, tagging, and editing longer notes. Obsidian is free for personal and commercial use; Sync and Publish are optional paid services. Your capture time depends on the vault, device, and navigation you need.

Method 2: Shortcuts — built-in Capture actions or an Obsidian URI

2a. Obsidian's built-in Capture actions

Since Obsidian 1.11 for mobile, Capture shortcuts can append or prepend text to a note without opening the Obsidian app. Select an Obsidian Capture action in Shortcuts, configure its destination, and try it with a short test line. This is an option to check before building a URI-based workflow.

2b. Shortcuts with obsidian://new

The Obsidian URI protocol can create a note or append to an existing one. It is a separate route that invokes Obsidian through a URL: configure the vault, file, content, and append behavior, and encode parameter values correctly. A silent parameter controls opening the new note; it is not the built-in Capture action. For voice input options, see 4 ways to dictate into Obsidian.

Method 3: Write a Markdown file into an accessible vault folder

An Obsidian vault contains Markdown files. A file action or compatible editor can create or append a .md file in a vault folder accessible on your iPhone, such as an iCloud Drive folder. Folder access and local file availability matter: a cloud-only file may need to download first. Check that your test note appears in the intended vault.

Method 4: Capture in Drafts, then choose an action

Drafts lets you write first and route the text later. Its actions guide includes built-in and installable actions; you do not have to build every action from scratch. An Obsidian workflow still needs the right action and destination settings. We compare this category in the iOS quick-capture comparison.

Method 5: SimpleMemo — an email copy plus direct vault append

SimpleMemo (Simple Memo - for Obsidian) can send a memo to your email and append it with a timestamp to a configured Inbox note or daily note. The vault append is a separate local operation: it does not wait for an email to arrive or require a mail-import plugin.

  • Open the capture screen, write or dictate, then send. The published 0.4-second figure measures warm launch to input readiness, not time to email delivery or a saved vault note. See the August 11 measurement conditions.
  • Folder-direct mode needs a vault folder selected on the iPhone and a locally accessible target. If direct access is unavailable, the URI fallback has different behavior.
  • The local append can work offline; email stays queued until a connection is available. Obsidian-only mode saves without emailing. The Free plan allows up to 3 sends per day.

Start with the vault setup and mode guide. Mail-provider details are in email to Obsidian. Email passes through the delivery service and is not end-to-end encrypted; the privacy architecture explains the route.

Method 6: Capture with SimpleMemo on Apple Watch

When your iPhone is in your pocket, dictate on the Watch and confirm the memo. Vault append uses the paired iPhone and its configured destination; it is not a direct write into a vault stored on the Watch. Email delivery needs connectivity. See Apple Watch voice memos to Obsidian for setup and delivery conditions.

The six approaches compared

Scroll the table sideways to read the setup and connection requirements.

Method 2 has two Shortcut routes. This is a workflow comparison, not an end-to-end speed ranking.
MethodCapture routeBest suited toConnection and setup
1. Obsidian mobileOpen a note and writeWriting, linking, organizingLocal notes can be edited offline; device sync needs connectivity
2a. Obsidian Capture actionsRun a configured Capture shortcutAppending without opening ObsidianObsidian 1.11+; configure and verify the destination
2b. Obsidian URIInvoke Obsidian with a configured URLURL-based automationConfigure and encode vault, file, content, and append parameters
3. Files or a file actionWrite a .md file in the vault folderFolder-based workflowsNeeds folder permission and the target file available locally
4. DraftsWrite, then run an actionRouting text to different destinationsDepends on the chosen action and its configuration
5. SimpleMemoCapture and send; direct append plus an optional email copyA consistent vault destination and email workflowLocal append needs a configured, accessible folder; email needs a connection
6. SimpleMemo on Apple WatchDictate and confirm on the wristCapturing while the iPhone stays in a pocketVault append uses the paired, configured iPhone; email needs connectivity

The habit that makes it work: one entrance

Multiple entrances scatter your notes and add a "where did I write that?" tax. The reliable pattern is one capture entrance → everything collects in a vault Inbox note → process inside Obsidian. How to handle those raw scraps is exactly what the fleeting notes guide covers.

FAQ

Is the Obsidian mobile app free?
Yes. Obsidian is free for personal and commercial use. Sync and Publish are optional paid services. Local note editing does not require a Sync subscription.

Do I need plugins for iPhone capture?
Obsidian's built-in Capture actions, basic obsidian://new links, and SimpleMemo's direct vault append do not require a community plugin. Daily-note workflows may require the built-in Daily Notes plugin to be enabled. Third-party actions depend on their own setup.

Which method is fastest?
This guide does not establish a fastest route from idea to a saved Obsidian note. SimpleMemo's reported 0.4 seconds measures warm launch to input readiness under the linked test conditions. It does not measure dictation, email delivery, or vault append. Compare complete workflows on your own device and vault.

Can I capture offline?
Obsidian can edit locally available notes offline. SimpleMemo can append locally in folder-direct mode when the configured target is accessible on the iPhone; email stays queued until connectivity returns. Cloud file downloads, device sync, URI fallback, and Watch delivery have separate requirements.

If method 5 or 6 fits your workflow, the SimpleMemo integration guide explains which note receives the text, the available modes, and how to confirm your first append.