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Drink Water! vs FillMeUp!: catalog facts
Drink Water!	FillMeUp!
Free Free and open source under the MIT License.	Free Free and open source under AGPL-3.0-only.
Android	Android
One-tap logging with configurable amounts Reminders adapt to a chosen time window and daily goal	One-tap water intake logging Customizable reminders that survive reboots
Android 12 or newer required	Android app
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License: AGPL-3.0-only
No account needed	Not stated if an account is needed
Works offline	Works offline
Official website Full listing and sources Checked October 8, 2026	Official website Full listing and sources Checked October 8, 2026

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