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Image Compressor vs Kompact: catalog facts
Image Compressor	Kompact
Free Free and open source under the MIT license.	Free Free and open source under the AGPL-3.0, with no account required.
Android	Android
Compresses JPEG and PNG files on the device Offers MozJPEG and Jpegli encoders	Fully offline, images never leave the phone Batch compression with target size and quality settings
Android-only Supports JPEG and PNG compression	Android only Watermarking is limited to text
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License: AGPL-3.0
Not stated if an account is needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 8, 2026	Official website Full listing and sources Checked October 2, 2026

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