The short answer
| Your goal | Use |
|---|---|
| Credit or branding on photos you publish | A corner mark: your name, copyright line, or logo |
| Stopping reuse of proofs and previews | A diagonal band across the whole photo |
| A whole batch, identical on every photo | A batch tool, not a photo editor |
Android has no built-in watermark feature. Gallery editors can draw text on one photo at a time, but the result drifts photo to photo, and most online watermark sites work by uploading your images to their server. A small on-device batch tool covers all three rows of that table; here is the walkthrough with Imgport.
Watermarking a batch, step by step
- Install Imgport from Google Play. No account, no ads.
- Tap "Watermark" on the Home screen, then select your photos. Already looking at them in your gallery? Share them to Imgport and they arrive pre-selected.
- Pick the type: Text or Logo. For text, type your name, brand, or copyright line; it renders through the platform text engine, so every language and script comes out right. For a logo, tap "Add logo" and pick your logo image once (a PNG with transparency works best).
- Pick the style: Standard or Protect. Standard anchors the mark at any of nine positions, the classic corner watermark. Protect lays one large translucent text band along the photo diagonal, the client-proof watermark. The band is text-only; logo marks use the anchored style.
- Dial it in. Position on the nine-point grid, exact size and opacity on sliders, and a Tone toggle: Light for white marks with a dark halo, Dark for the inverse when a light mark washes out on a bright photo.
- Check the live preview. It renders through the same pipeline as the real run, so what you see is exactly what gets stamped, and a pager lets you flip through every photo in the batch.
- Pick a destination (Gallery, Downloads, or straight to the share sheet) and tap Start. Originals are never touched; every photo gets a new file.
Free vs Pro, honestly: configuring and previewing the watermark on your actual photos is free. Running the batch is the Pro unlock, a one-time $2.99 (no subscription). Everything else in this guide about quality and placement applies whatever tool you use.
The live preview renders through the same engine as the real run: what you see is what gets stamped.
Logo watermarks and where the logo lives
A logo mark is the branding option: the same mark, in the same place, at the same opacity, on everything you publish. Imgport keeps up to five logos, so a wordmark and a monogram can coexist, with one active at a time; saved presets simply use whichever logo is active.
Because Imgport otherwise never stores your images, the logos are the app's single deliberate exception, and they are handled accordingly: each is copied privately into the app at your explicit request, each is removable in-app, and none of them can leave the device. The app cannot make network connections (it does not declare the internet permission), and its data is excluded from backups.
What a good watermark looks like
- Translucent, not opaque. Around 50 to 70 percent opacity credits you without shouting over the photo. Imgport defaults to 70.
- Sized to the photo, not in pixels. A mark that is 4 percent of a small web image and 4 percent of a full-resolution export reads identically on both. That is why the size control is a percentage.
- Contrast handled. Pure white text disappears on a bright sky. A subtle halo in the opposite tone keeps the mark legible on any background; flip the Tone toggle when a photo fights it.
- Placed by purpose. Credit belongs in a corner, out of the subject's way. Protection belongs across the middle, where it cannot be cropped out. Choose per job, not once forever.
The Protect band runs along the photo's own diagonal, so it cannot be cropped away.
The honest fine print
- Ultra HDR photos lose their HDR when watermarked. The gain map describes the original pixels; carrying it across a composite would tint the mark, so it is dropped deliberately rather than wrongly.
- Tiny images are declined, not defaced. A photo too small to carry a legible mark fails with a clear message ("This photo is too small to watermark") instead of shipping an unreadable stamp.
- Metadata is removed from outputs by default, GPS location included, which is usually what you want on photos headed for the public internet. Keeping the original metadata is a Pro option on JPG outputs.
- A watermark is a deterrent, not a lock. Corner marks crop; even bands can be attacked with enough effort. It signals ownership and makes casual reuse inconvenient; nothing more is honest to promise.
The alternatives, briefly
For a single photo where consistency does not matter, your gallery app's editor can draw text and may be all you need. Dedicated watermark apps vary widely; before trusting one, check two things: whether it works offline (many upload your photos to apply the mark) and what it does to metadata. If the answer to either is unclear, the same privacy checklist we apply to online converters applies here.
