Signet

Support

Help for Signet on Android  ·  Last updated: 13 September 2026

Signet adds text or transparent-logo watermarks to batches of photos on your device. This page covers the initial unlimited Android release.

Start a watermark job

1. Open Signet and choose Select photos or import from Files.
2. Select photos using Android’s system picker. JPEG, PNG and WebP are supported inputs; HEIC/HEIF support depends on the device decoder. Convert an unreadable image to JPEG or PNG.
3. Add a text watermark or transparent PNG logo.
4. Review placement across portrait, landscape and square photos.
5. Adjust an individual photo if it needs a different position or visibility.
6. Choose JPEG or PNG output, select Gallery or grant a destination folder through the system picker, and start export.
7. Use the completion screen to find the successfully saved copies.

Original photos

Signet opens selected source photos as read-only content. It never overwrites them. Every successful export is a new file. If a job fails or is cancelled, Signet does not report a partial output as complete.

Supported limits in the first release

• Android 7.0 or newer.
• JPEG and PNG photo export.
• Text and transparent PNG logo watermarks.
• Maximum 13,000,000 oriented pixels per selected image. For example, common 12–12.98 MP camera photos are within this measured limit.
• Up to 200 selected photos and 24 watermark layers per template.
• Actual batch capacity and speed depend on image dimensions, format, available memory, free storage and the phone. Large batches can use substantial memory and previews may take longer on slower devices.

Images over the supported pixel limit are rejected before export to reduce the risk of the operating system terminating the job.

Common problems

A photo cannot be read

• Open the photo in your gallery to confirm it is still available.
• Try selecting it again through the system picker.
• If it is cloud-only, download the original to the device first.
• Convert an unusual or damaged file to a standard JPEG or PNG.

An export failed

The completion screen may show a failure count without a detailed cause. A retry cannot solve a full disk or revoked folder access until that condition is corrected.

• Free storage on the phone and, if different, the selected destination volume.
• If folder access was revoked or the folder moved, select the destination again through the system picker.
• Keep Signet open while retrying a very large batch.
• Retry only the failed items from the result screen; successful siblings should not be duplicated.
• Try JPEG output if a very large PNG job exceeds the device’s available memory.

I cannot find the output

• Use the completion screen’s destination action.
• Check your Photos/Gallery app and its recent items.
• If you selected a Files destination, reopen that folder through Android’s Files app.

The App was closed during export

An active export uses an Android foreground service, but memory pressure, battery restrictions and manufacturer behavior can still stop it. Reopen Signet. The saved draft should return, while an incomplete output should not appear as successful. Review the recovered job and retry the items that did not finish. For demanding batches, keep Signet visible and consider fewer photos at a time.

Does Signet need internet access?

Photo selection, watermark editing, preview and export work on-device without internet once the selected files are available locally. Cloud-only picker files may need downloading first. Optional remote diagnostics use internet only in a supporting build after you opt in. Policy and support links open your browser. The initial release has no ads, subscriptions or in-app purchases.

Accessibility

Signet provides Android text scaling and TalkBack labels for the main workflow. Known launch limitation: the editor tool tabs and review compare control are not reachable through hardware-keyboard focus; those actions currently require touch. If an action is clipped, unlabeled or difficult to reach, report the screen, font-size setting, input method and TalkBack state.

Remote diagnostics and privacy requests

In Settings, Remote diagnostics shows “Unavailable” when the build has no enabled service. A supporting build offers an optional control, off until you choose to turn it on. Turning it off stops future collection and does not delete previously sent diagnostics.

For access or deletion requests, email kowalski.dev07@gmail.com with the subject “Signet privacy request”, your app version and the kind of information concerned. We do not need private media. The App has no account and does not display its diagnostic installation identifier, so your email alone may not let us match a remote record. We will explain what can be identified and handled with the provider’s tools. See the Privacy Policy for data categories and retention.

What to include in a useful report

• Signet version and build number from Settings.
• Phone manufacturer and model.
• Android version.
• JPEG or PNG output.
• Number of photos and approximate megapixels.
• Whether the watermark was text or a logo.
• The exact error message and the step where it appeared.