OS Watermark Pro — Support

PDFs: up to 100 pages and 100 MB. Photos: JPEG, PNG and HEIC, up to 60 megapixels. Videos: MP4 and MOV; capture is limited to 10 minutes. Unlock a locked PDF before importing it. You control the watermark text.

Native dimensions are preserved within supported-format limits. Re-encoding can change compression, codec or rendering; universal HDR or video frame-rate preservation and lossless output are not promised.

Tap a watermark to select it, then drag its body to move it. Frame handles resize it; the rotation control changes its angle. Two fingers zoom the document. A locked layer can be selected but cannot be moved. The expanded preview lets you browse PDF pages; video previews share the same playback position.

The Photos picker shows only videos stored in Photos. Import a video from a folder or another app with “Choose in Files”. OS Watermark Pro does not need general photo library access for this picker.

In Timestamp, choose Photo or Video and a 4:3, 16:9 or 1:1 ratio. The preview framing follows that choice. Before capturing, choose one of five date and time formats; the displayed language and time zone are used. You can also enable GPS coordinates or an address, subject to permission and availability. The instant, format, language, time zone and available location are fixed at capture. The dedicated editor then lets you adjust appearance and placement without editing the date, time or location. In video, the displayed date and time follow elapsed playback time and advance in the export, according to the chosen format; the location stays fixed. These details are visible in the media and are separate from GPS metadata. The timestamp is not a certification.

View metadata and remove personal information for free. Premium and Family let you edit supported fields. Uneditable data stays read-only; cleaning metadata does not erase text already visible in an image.

Expected formats are explained beside dates and coordinates. Opaque data, embedded PDF XMP and timed video metadata are not edited. Changes are checked when the copy is created; a photo may be re-encoded.

The library retains copies and originals you choose to keep. Folders provide internal organisation. Deleting a folder moves its files to the parent; deleting a file removes its internal copy and retained original. External exports remain independent. Local data may be included in Apple backups according to your settings.

Password protection requires Premium/Family.

Choose the name, destination and automatic opening in export options. A password protects a PDF; a protected photo is converted to PDF. A protected video uses an .imprynta container that opens in the app. Suggested names include the date and time, and each copy is saved separately. Renaming a library entry does not rename files previously exported elsewhere.

Built-in fonts and Roboto work offline. Other catalogue fonts download with their licence from GitHub on request, then remain available locally. Importing your own supported TTF or OTF font requires Premium/Family. The provider receives neither your files nor watermark text.

Passwords are not saved. Files unlocked for preview are temporary and deleted when it closes; leftovers from interrupted sessions are cleaned at next launch. A separately retained original does not have the copy’s password. Keep your password: OS Studio cannot recover it.

A template stores a reusable composition. A project also keeps a private copy of the source so you can resume work. Renaming, duplicating or deleting these items does not change the original file. Logo and signature collections stay local.

Free: 5 saved personal templates. Premium/Family: Expanded library: up to 256 templates within 32 MiB total; size may reduce the count below 256.

Select up to 5 supported files in Free or 30 with Premium/Family. Adjust the composition on a real file before running the batch. Relative proportions are applied to each source. Cancellation keeps completed copies; errors are listed per file. A free batch is one ad opportunity.

The free offer may show an ad at startup or before you create a new output file. If no ad is available or permitted, you continue without waiting for one to load. Ads are requested in Limited Ads mode, which still uses technical data. Recognised paid subscriptions remove ads. You can revisit privacy choices in Settings when that option is available.