Why Your Gmail Mobile Signature Differs From Desktop

You spend time building a Gmail signature on your desktop — your name, title, phone number, a company logo, and a link to your calendar. A client emails you while you are away from your desk, you reply from the Gmail app on your phone, and the message goes out with the default 'Sent from Gmail Mobile' footer or a completely different block of text you do not remember setting. The gmail mobile signature different from desktop situation catches almost everyone who builds a careful desktop signature and assumes the phone will follow. It will not, and the reason is deliberate design rather than a bug.

Gmail maintains two entirely separate signature systems. The signature you create at gmail.com uses HTML — formatted text, embedded images, links, and logos. The signature in the Gmail Android or iOS app is plain text only, stored independently in the app, and never synced automatically with what you set on the web. Setting or changing one changes nothing about the other. This guide explains why the two diverge, shows you how to configure each one properly for Android and iOS, and covers what to do when the setting does not take.

Why is your Gmail mobile signature different from the desktop version?#

The gap comes down to how each version of Gmail composes outgoing messages. Gmail on the web writes emails in HTML. Your desktop signature is stored as an HTML block — which is why you can add bold text, change the font color, embed a logo image, and include a hyperlink that displays as 'Book a call' rather than a raw URL. When you send from gmail.com, that HTML block attaches to the bottom of every message.

Gmail's Android and iOS apps compose messages differently, especially for replies and forwards on mobile connections. The mobile signature field accepts plain text only. What you type is exactly what appears — no formatting tags, no embedded images, no font changes. If you paste an HTML snippet from your desktop signature into the mobile field, the raw code appears as visible text with angle brackets and attribute names, not as a rendered element.

This is why your logo does not carry over. An image in an HTML signature is an img tag pointing to a hosted file or an inline base64 blob. The mobile signature field cannot interpret that tag. The image is either absent entirely or appears as garbled code if you paste it directly. The limitation is not one Gmail is likely to remove: plain-text signatures load instantly and render correctly in every mail client on earth. HTML signatures with embedded images can be several kilobytes in size and occasionally get stripped or mangled by receiving servers or aggressive spam filters.

Google has not indicated any plans to add HTML signature support to the Gmail mobile app. For now, a short plain-text signature is both the correct approach and the one that travels best.

Before you start: what to know about Gmail signature settings#

A few things to keep straight before you open the Gmail app. First, each Gmail account you have added to the app has its own mobile signature slot. If you have a personal Gmail and a Google Workspace address on the same phone, you need to configure the mobile signature separately for each one. The setting does not cascade across accounts, and each toggle starts off by default.

Second, the mobile signature setting lives inside the Gmail app on your device, not at gmail.com. If you visit gmail.com in your phone's browser and edit your signature there, you are editing the HTML web signature — not the one the app attaches when you compose from your phone. Even visiting the mobile version of gmail.com changes only the web signature.

Third, plan for a simpler signature on mobile. Your name, title, company, phone number, and a URL are all plain text and travel well. A logo, a formatted block with colored sections, or HTML-styled contact details will not work. If your desktop signature has all of those, your mobile version will be a condensed text-only equivalent — which is usually fine, because the reader is typically on a phone too and a short clean block reads better than a long attempted workaround.

How to change your Gmail signature on Android#

The setting is buried three levels deep in the Gmail app on Android, which is why many users never find it and end up with the default footer. Here are the exact steps.

1. 1

   Open the Gmail app and tap the menu

   Tap the three-line icon in the top-left corner of the screen. This opens the main sidebar with your folder list and account options.

2. 2

   Go to Settings

   Scroll to the bottom of the sidebar and tap Settings. It appears below all your label folders near the bottom of the list.

3. 3

   Select the account to configure

   If you have more than one Gmail or Google Workspace account in the app, each appears as a separate row. Tap the account whose mobile signature you want to set. You will need to repeat this process for each account separately — there is no global setting.

4. 4

   Tap Signature settings

   Scroll down within the account settings page to the General section. Tap Signature settings.

5. 5

   Enable Mobile Signature and type your text

   Toggle Mobile Signature on. A text field appears below the toggle. Tap the field and type your plain-text signature. A useful format: your full name on the first line, title and company on the second, phone number on the third, and a short URL on the fourth if relevant.

6. 6

   Navigate away to save

   There is no Save button. Gmail saves the mobile signature automatically when you leave the screen. Tap the back arrow or navigate to another part of the app. Send a test email to yourself to confirm the signature is appending correctly before you rely on it for a real message.

How to set your Gmail signature in the iOS Gmail app#

The steps on iPhone and iPad follow the same structure as Android. The option is in the same location within the app settings.

1. 1

   Open the Gmail app and tap the three-line menu

   Tap the three horizontal lines at the top left of the screen to open the sidebar.

2. 2

   Tap Settings at the bottom of the sidebar

   Scroll past your label list and tap Settings near the bottom.

3. 3

   Tap the account you want to configure

   Each account appears as a separate row under the Settings heading. Tap the one you want to set a mobile signature for.

4. 4

   Tap Signature settings

   Scroll down to find Signature settings and tap it.

5. 5

   Toggle on Mobile Signature and type your text

   Turn the toggle on. The text input field appears below it. Type your plain-text signature. Tap Done on the keyboard when finished.

6. 6

   Navigate back to save

   Tap the back arrow. The setting saves automatically. Send a test email to yourself from this account to confirm the signature appears as expected.

Gmail mobile vs desktop signatures: full comparison#

The table below shows what each Gmail environment supports. Use it to decide which content belongs in your mobile signature versus your desktop one — and whether a fully unified look is achievable or whether a deliberately shorter mobile version is the better call.

One capability worth noting: hyperlinks. Your desktop signature can include 'Book a call' as a hyperlink pointing to a Calendly URL. In the mobile signature, you can only include the raw URL as a string of text. Most email clients auto-detect URLs and make them tappable on the receiving end, but you cannot give a URL a custom display name in plain text. Keep any URLs short if you include them — a full tracking URL with UTM parameters will look unwieldy.

What to do when your Gmail mobile signature is not showing#

If you set a mobile signature and it is still not appearing on outgoing messages — or if the wrong text is appearing — the cause is almost always one of a short list of things.

The toggle is off. The mobile signature field only activates when the toggle above it is on in Settings for that account. The toggle defaults to off on new installs and can reset after some app updates. Go back to Settings, select the account, tap Signature settings, and verify the toggle is enabled.

You are sending from the wrong account. If you have multiple accounts added to the app and only one has a mobile signature configured, sending from the other account will use whatever that account's setting is — which may be the default footer or nothing at all. Tap the From field in your compose window before sending and confirm you are sending from the account whose signature you configured.

The app is in a cached state. After changing the signature setting, send a test message to yourself. If the old text or the default line still appears, force-quit the Gmail app and reopen it, then try again.

You pasted HTML into the mobile signature field. If your signature contains visible angle brackets and attribute names, you pasted code from your web signature into the plain-text field. Go back to Signature settings, clear the field entirely, and type fresh plain text without any HTML markup.

The 'Sent from Gmail Mobile' line persists after you set a custom signature. This default footer is replaced — not removed separately — when you set a custom mobile signature. If it continues to appear after you set your text and enable the toggle, restart the Gmail app. Note that if the toggle is on but the text field is empty, some versions of the Gmail app will still fall back to the default footer.

If the mobile signature toggle was previously on and the signature has since disappeared, a Gmail app update may have reset the setting. Google updates the Gmail app automatically on both Android and iOS, and signature settings can revert to the default state after a major version change. The fix is the same: open Settings, find the account, re-enable the toggle, and retype your signature.

A faster way to keep signatures consistent across every account#

The per-app, per-account setup described above works, but it compounds quickly if you maintain email addresses across multiple providers — a personal Gmail, a Google Workspace address, an Outlook mailbox for a client, and an IMAP address for a side project. Every device change and every account addition means another signature to configure, and every update to your phone number or title means manually hunting through the settings of each separate app.

AI Emaily manages outgoing signatures across all connected accounts — Gmail, Outlook, iCloud, Fastmail, and any IMAP address — from a single settings panel. When your contact details change, you update them once and every connected account reflects it. In Copilot mode, AI Emaily attaches the right signature for each account to the draft before you approve and send, so the correct signature is the default rather than something to remember and check. We build AI Emaily. A 7-day free trial is available at aiemaily.com — card required, nothing charged if you cancel before day seven. Pricing details are at aiemaily.com/pricing. Full signature configuration documentation is at /docs/signatures.