Mobile app · Office & notes

Kairos

Tasks in the right order, fitted into your day, with on-device machine learning.

Completely free
Android
Open source

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Download from the official source

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Geographic availability: No geographic restriction found in our sources; availability is not checked country by country.

Technical details

Pricing: Completely freeconfirmed by F-Droid
License: MIT — Open source (permissive)confirmed by F-Droid
Open source: Yes
Commercial use: Yesconfirmed by F-Droid
Account required: not documented
Credit card required: Noconfirmed by F-Droid
Watermark: Not applicable
Ads: No
Platforms: AndroidEstablished by Android: F-Droid
Publisher: SKOHscripts
Latest version: 4.0.0 (9 November 2026)
Latest activity: 9 November 2026
Source code: github.com/SKOHscripts/Kairos

Overview

Features described in its F-Droid listing, in its GitHub repository and on its official website: reminders and due dates, statistics and charts, MIDI support.

Overview written by LicitPro from the documentation published by the authors and the cited sources; we have not tried the resource ourselves.

Excerpts that establish this information

“Fixed times, recurring tasks (daily, weekdays, weekly, “on the 23rd of the month”), dependencies between tasks, editable subtasks, French public holidays.” — F-Droid, 10 November 2026
“Statistics compare your estimates with the time actually spent.” — F-Droid, 10 November 2026
“Export and import a JSON file, to back up or switch devices; or keep an up-to-date copy in a folder you sync.” — F-Droid, 10 November 2026
“Les créneaux de deep work sont protégés ; l’après-midi, les tâches complexes cèdent la place aux tâches légères.” — F-Droid, 10 November 2026

At a glance

Kairos is completely free: it is open source software, and every feature is available without paying or subscribing.

Its licence (MIT) is a permissive open source licence: use, modification and redistribution are allowed, including in commercial projects.

Strengths

Open source code
No advertising
Commercial use allowed

Sources and checks

Facts collected from F-Droid (credit card, source code, publisher, licence, free status, platforms, ads, commercial use, version) — 9 November 2026
Last technical check: 6 November 2026
Description from F-Droid — F-Droid (citation courte)

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