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Image Toolbox vs Kompact: catalog facts
Image Toolbox	Kompact
Free Free and open source under the Apache-2.0 licence.	Free Free and open source under the AGPL-3.0, with no account required.
Android	Android
More than 310 filters with shareable custom filter chains Batch processing and format conversion	Fully offline, images never leave the phone Batch compression with target size and quality settings
Android only The large feature set can take time to learn	Android only Watermarking is limited to text
Downloadable app	Downloadable app
Open source	Open source
License: Apache-2.0	License: AGPL-3.0
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

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