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Kompact vs Watermark: catalog facts
Kompact	Watermark
Free Free and open source under the AGPL-3.0, with no account required.	Free Free and open source under GPL-2.0.
Android	Windows, Linux
Fully offline, images never leave the phone Batch compression with target size and quality settings	Applies watermarks to multiple images Expert mode offers watermark customization
Android only Watermarking is limited to text	Supports TrueType fonts only.
Downloadable app	Downloadable app
Open source	Open source
License: AGPL-3.0	License: GPL-2.0
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 8, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.